PART 4—DISRUPTIONS TO COMMUNICATIONS Authority: 47 U.S.C. 34-39, 151, 154, 155, 157, 201, 214, 218, 251, 301, 303, 307, 309, 316, 332, 403, 615, 615a-1, 615b, 1302(a), 1302(b), 1421, 1426, and 1433; 5 U.S.C. 301; and E.O. 10530, 19 FR 2709, 3 CFR, 1954-1958 Comp., p. 189. Source: 69 FR 70338, Dec. 3, 2004, unless otherwise noted. General § 4.1 Scope, basis, and purpose. (a) In this part, the Federal Communications Commission is setting forth requirements pertinent to the reporting of disruptions to communications and to the reliability and security of communications infrastructures. (b) The definitions, criteria, and reporting requirements set forth in Section 4.15 of this part are applicable to submarine cable providers who have been licensed pursuant to 47 U.S.C. 34-39. [81 FR 52362, Aug. 8, 2016, as amended at 91 FR 1403, Jan. 14, 2026] § 4.2 Availability of reports filed under this part. Reports filed under this part will be presumed to be confidential under § 0.457(d)(1) of this chapter. Notice of any requests for inspection of outage reports will be provided pursuant to § 0.461(d)(3) of this chapter except that the Chief of the Public Safety and Homeland Security Bureau may grant, without providing such notice, an agency of the states, the District of Columbia, U.S. territories, Federal Government, or Tribal Nations direct access to portions of the information collections affecting its respective jurisdiction after the requesting agency has certified to the Commission that it has a need to know this information and has protections in place to safeguard and limit the disclosure of this information as described in the Commission's Certification Form for NORS and DIRS Sharing (Certification Form). Sharing is restricted by the following terms: (a) Requesting Agencies granted direct access to information collections must report immediately to any affected service providers and to the Commission any known or reasonably suspected unauthorized use or improper disclosure, manage their agency's access to outage reports by managing user accounts in accordance with the Commission's rules, coordinate with the Commission to manage an unauthorized access incident, and answer any questions from the Commission regarding their agency's access, use, or sharing of reports. (b) Agencies granted direct access to information collections may share copies of the filings, and any confidential information derived from the filings, outside their agency on a strict need-to-know basis when doing so pertains to a specific imminent or on-going public safety event. The agency must condition the recipients' receipt of confidential NORS and DIRS information on the recipients' certification, on a form separate from the Certification Form, that they will treat the information as confidential, not publicly disclose it absent a finding by the Commission that allows them to do so, and securely destroy the information by, at a minimum, securely cross-cut shredding, or machine-disintegrating, paper copies of the information, and irrevocably clearing and purging digital copies, when the public safety event that warrants access to the information has concluded. (c) Except as permitted pursuant to paragraph (b) of this section, agencies granted direct access to information collections may not share filings, or any confidential information derived from the filings, with non-employees of the agency, including agency contractors, unless such sharing is expressly authorized in writing by the Commission. (d) Agencies granted direct access to information collections may disseminate aggregated and anonymized information to the public. Such information must be aggregated from at least four service providers and must be sufficiently anonymized so that it is not possible to identify any service providers by name or in substance. (e) Consequences for an Agency's failure to comply with these terms may result in, among other measures, termination of direct access to reports by the Commission for a time period to be determined by the Commission based on the totality of the circumstances surrounding the failure. [86 FR 22825, Apr. 29, 2021] Reporting Requirements for Disruptions to Communications § 4.3 Communications providers covered by the requirements of this part. (a) Cable communications providers (b) Communications provider (c) IXC or LEC tandem facilities (d) Satellite communications providers (e) Signaling System 7 (SS7) (f) Wireless service providers See (g) Wireline communications providers (h) Interconnected Voice over Internet Protocol (VoIP) providers See (i) Excluded from the requirements of this part 4 are those equipment manufacturers or vendors that do not maintain or provide communications networks or services used by communications providers in offering communications. (j) Covered 988 service providers [69 FR 70338, Dec. 3, 2004, as amended at 77 FR 25097, Apr. 27, 2012; 83 FR 7401, Feb. 21, 2018; 89 FR 2513, Jan. 16, 2024] § 4.5 Definitions of outage, special offices and facilities, 911 special facilities, and 988 special facilities. (a) Outage (b) Special offices and facilities (c) A critical communications outage that potentially affects an airport is defined as an outage that: (1) Disrupts 50 percent or more of the air traffic control links or other FAA communications links to any airport; (2) Has caused an Air Route Traffic Control Center (ARTCC) or airport to lose its radar; (3) Causes a loss of both primary and backup facilities at any ARTCC or airport; (4) Affects an ARTCC or airport that is deemed important by the FAA as indicated by FAA inquiry to the provider's management personnel; or (5) Has affected any ARTCC or airport and that has received any media attention of which the communications provider's reporting personnel are aware. (d) [Reserved] (e) An outage that potentially affects a 911 special facility occurs whenever: (1) There is a loss of communications to PSAP(s) potentially affecting at least 900,000 user-minutes and: The failure is neither at the PSAP(s) nor on the premises of the PSAP(s); no reroute for all end users was available; and the outage lasts 30 minutes or more; or (2) There is a loss of 911 call processing capabilities in one or more E-911 tandems/selective routers for at least 30 minutes duration; or (3) One or more end-office or MSC switches or host/remote clusters is isolated from 911 service for at least 30 minutes and potentially affects at least 900,000 user-minutes; or (4) There is a loss of ANI/ALI (associated name and location information) and/or a failure of location determination equipment, including Phase II equipment, for at least 30 minutes and potentially affecting at least 900,000 user-minutes (provided that the ANI/ALI or location determination equipment was then currently deployed and in use, and the failure is neither at the PSAP(s) or on the premises of the PSAP(s)). (f) An outage that potentially affects a 988 special facility occurs whenever there is a loss of the ability of the 988 Suicide & Crisis Lifeline to receive, process, or forward calls, potentially affecting at least 900,000 user-minutes and lasting at least 30 minutes duration. [69 FR 70338, Dec. 3, 2004, as amended at 81 FR 45067, July 12, 2016; 89 FR 2513, Jan. 16, 2024] § 4.7 Definitions of metrics used to determine the general outage-reporting threshold criteria. (a) Administrative numbers (b) Assigned numbers (c) Assigned telephone number (d) Optical Carrier 3 (OC3) minutes (e) User minutes (1) Assigned telephone number minutes (as defined in paragraph (c) of this section), for telephony, including non-mobile interconnected VoIP telephony, and for those paging networks in which each individual user is assigned a telephone number; (2) The mathematical result of multiplying the duration of an outage, expressed in minutes, by the number of end users potentially affected by the outage, for all other forms of communications. For interconnected VoIP service providers to mobile users, the number of potentially affected users should be determined by multiplying the simultaneous call capacity of the affected equipment by a concentration ratio of 8. (f) Working telephone numbers [69 FR 70338, Dec. 3, 2004, as amended at 77 FR 25097, Apr. 27, 2012; 81 FR 45068, July 12, 2016] § 4.9 Outage reporting requirements—threshold criteria. (a) Cable. (1) Potentially affects at least 900,000 user minutes of telephony service; (2) Affects at least 667 OC3 minutes; (3) Potentially affects any special offices and facilities (in accordance with paragraphs (a) through (d) of § 4.5); or (4) Potentially affects a 911 special facility (as defined in § 4.5(e)) or potentially affects a 988 special facility (as defined in § 4.5(f)), in which case they also shall notify the affected facility in the manner described in paragraph (h) or (i) of this section, respectively. Not later than 72 hours after discovering the outage, the provider shall submit electronically an Initial Communications Outage Report to the Commission. Not later than 30 days after discovering the outage, the provider shall submit electronically a Final Communications Outage Report to the Commission. The notification and the initial and final reports shall comply with all of the requirements of § 4.11. (b) IXC or LEC tandem facilities. (c) Satellite. (2) All satellite communications providers shall submit electronically a Notification to the Commission within 120 minutes of discovering that they have experienced on any facilities that they own, operate, lease, or otherwise utilize, an outage of at least 30 minutes duration that manifests itself as: (i) A loss of complete accessibility to at least one satellite or transponder; (ii) A loss of a satellite communications link that potentially affects at least 900,000 user-minutes (as defined in § 4.7(d)) of either telephony service or paging service; or (iii) [Reserved] (iv) Potentially affecting a 911 special facility (as defined in § 4.5(e)) or potentially affecting a 988 special facility (as defined in § 4.5(f)), in which case the affected facility shall be notified in the manner described in paragraph (h) or (i) of this section, respectively. (3) Not later than 72 hours after discovering the outage, the operator and/or provider shall submit electronically an Initial Communications Outage Report to the Commission. Not later than thirty days after discovering the outage, the operator and/or provider shall submit electronically a Final Communications Outage Report to the Commission. (4) The Notification and the Initial and Final reports shall comply with all of the requirements of § 4.11. (5) Excluded from these outage-reporting requirements are those satellites, satellite beams, inter-satellite links, MSS gateway earth stations, satellite networks, and transponders that are used exclusively for intra-corporate or intra-organizational private telecommunications networks, for the one-way distribution of video or audio programming, or for other non-covered services (that is, when they are never used to carry common carrier voice or paging communications). (d) Signaling system 7. (e) Wireless. (i) Of a Mobile Switching Center (MSC); (ii) That potentially affects at least 900,000 user minutes of either telephony and associated data (2nd generation or lower) service or paging service; (iii) That affects at least 667 OC3 minutes (as defined in § 4.7); or (iv) [Reserved] (v) That potentially affects a 911 special facility (as defined in § 4.5(e)) or potentially affects a 988 special facility (as defined in § 4.5(f)), in which case they also shall notify the affected facility in the manner described in paragraph (h) or (i) of this section, respectively. (2) In determining the number of users potentially affected by a failure of a switch, a wireless provider must multiply the number of macro cell sites disabled in the outage by the average number of users served per site, which is calculated as the total number of users for the provider divided by the total number of the provider's macro cell sites. (3) For providers of paging service only, a notification must be submitted if the failure of a switch for at least 30 minutes duration potentially affects at least 900,000 user-minutes. (4) Not later than 72 hours after discovering the outage, the provider shall submit electronically an Initial Communications Outage Report to the Commission. Not later than 30 days after discovering the outage, the provider shall submit electronically a Final Communications Outage Report to the Commission. (5) The Notification and Initial and Final reports shall comply with the requirements of § 4.11. (f) Wireline. (1) Potentially affects at least 900,000 user minutes of either telephony or paging; (2) Affects at least 667 OC3 minutes; (3) Potentially affects any special offices and facilities (in accordance with paragraphs (a) through (d) of § 4.5); or (4) Potentially affects a 911 special facility (as defined in § 4.5(e)) or potentially affects a 988 special facility (as defined in § 4.5(f)), in which case they also shall notify the affected facility in the manner described in paragraph (h) or (i) of this section, respectively. Not later than 72 hours after discovering the outage, the provider shall submit electronically an Initial Communications Outage Report to the Commission. Not later than 30 days after discovering the outage, the provider shall submit electronically a Final Communications Outage Report to the Commission. The Notification and the Initial and Final reports shall comply with all of the requirements of § 4.11. (g) Interconnected VoIP Service Providers. (i) Within 240 minutes of discovering that they have experienced on any facilities that they own, operate, lease, or otherwise utilize, an outage of at least 30 minutes duration that potentially affects a 911 special facility (as defined in § 4.5(e)) or potentially affects a 988 special facility (as defined in § 4.5(f)), in which case they also shall notify the affected facility in the manner described in paragraph (h) or (i) of this section, respectively; or (ii) Within 24 hours of discovering that they have experienced on any facilities that they own, operate, lease, or otherwise utilize, an outage of at least 30 minutes duration: (A) That potentially affects at least 900,000 user minutes of interconnected VoIP service and results in complete loss of service; or (B) That potentially affects any special offices and facilities (in accordance with paragraphs § 4.5(a) through (d)). (2) Not later than thirty days after discovering the outage, the provider shall submit electronically a Final Communications Outage Report to the Commission. The Notification and Final reports shall comply with all of the requirements of § 4.11. (h) 911 special facility outage notification. (1) Appropriate contact information. (2) Content of notification. (i) An identifier unique to each outage; (ii) The name, telephone number, and email address at which the notifying cable, satellite, wireless, wireline, interconnected VoIP, or covered 911 service provider can be reached for follow up; (iii) The name of the cable, satellite, wireless, wireline, interconnected VoIP, or covered 911 service provider(s) experiencing the outage; (iv) The date and time when the incident began (including a notation of the relevant time zone); (v) The types of communications service(s) affected; (vi) The geographic area affected by the outage; (vii) A statement of the notifying cable, satellite, wireless, wireline, interconnected VoIP, or covered 911 service provider's expectations for how the outage potentially affects the 911 special facility ( e.g., (viii) Expected date and time of restoration, including a notation of the relevant time zone; (ix) The best-known cause of the outage; and (x) A statement of whether the message is the notifying cable, satellite, wireless, wireline, interconnected VoIP, or covered 911 service provider's initial notification to the 911 special facility, an update to an initial notification, or a message intended to be the service provider's final assessment of the outage. (3) Means of notification. (4) Timing of initial notification. (5) Follow-up notification. (i) 988 Special facility outage notification. (1) Appropriate contact information. (2) Content of notification. (i) An identifier unique to each outage; (ii) The name, telephone number, and email address at which the notifying 988 service provider can be reached for follow up; (iii) The name of the covered 988 service provider experiencing the outage; (iv) The date and time when the incident began (including a notation of the relevant time zone); (v) The types of communications service(s) affected; (vi) The geographic area affected by the outage; (vii) A statement of the notifying covered 988 service provider's expectations for how the outage potentially affects the special facility ( e.g., (viii) Expected date and time of restoration, including a notation of the relevant time zone; (ix) The best-known cause of the outage; and (x) A statement of whether the message is the notifying covered 988 service provider's initial notification to the special facility, an update to an initial notification, or a message intended to be the service provider's final assessment of the outage. (3) Means of notification. (4) Timing of initial notification. (5) Follow-up notification. [69 FR 70338, Dec. 3, 2004, as amended at 77 FR 25097, Apr. 27, 2012; 79 FR 3130, Jan. 17, 2014; 79 FR 7589, Feb. 10, 2014; 81 FR 45068, July 12, 2016; 88 FR 9764, Feb. 15, 2023; 89 FR 2513, Jan. 16, 2024] § 4.11 Notification and initial and final communications outage reports that must be filed by communications providers. Notification and Initial and Final Communications Outage Reports shall be submitted by a person authorized by the communications provider to submit such reports to the Commission. The person submitting the Final report to the Commission shall also be authorized by the provider to legally bind the provider to the truth, completeness, and accuracy of the information contained in the report. Each Final report shall be attested by the person submitting the report that he/she has read the report prior to submitting it and on oath deposes and states that the information contained therein is true, correct, and accurate to the best of his/her knowledge and belief and that the communications provider on oath deposes and states that this information is true, complete, and accurate. The Notification shall provide: The name of the reporting entity; the date and time of onset of the outage; a brief description of the problem; service effects; the geographic area affected by the outage; and a contact name and contact telephone number by which the Commission's technical staff may contact the reporting entity. The Initial and Final Reports shall contain the information required in this part 4. The Initial report shall contain all pertinent information then available on the outage and shall be submitted in good faith. The Final report shall contain all pertinent information on the outage, including any information that was not contained in, or that has changed from that provided in, the Initial report. The Notification and the Initial and Final Communications Outage Reports are to be submitted electronically to the Commission. “Submitted electronically” refers to submission of the information using Commission-approved Web-based outage report templates. If there are technical impediments to using the Web-based system during the Notification stage, then a written Notification to the Commission by e-mail, FAX, or courier may be used; such Notification shall contain the information required. All hand-delivered Notifications and Initial and Final Communications Outage Reports, shall be addressed to the Federal Communications Commission, The Office of Secretary, Attention: Chief, Public Safety & Homeland Security Bureau. Electronic filing shall be effectuated in accordance with procedures that are specified by the Commission by public notice. Notifications and initial reports may be withdrawn under legitimate circumstances, e.g., when the filing was made under the mistaken assumption that an outage was required to be reported. [71 FR 69037, Nov. 29, 2006, as amended at 80 FR 34324, June 16, 2015] § 4.13 [Reserved] § 4.15 Submarine cable outage reporting. (a) Definitions. (i) An outage of a portion of submarine cable system between submarine line terminal equipment (SLTE) at one end of the system and SLTE at another end of the system occurs for 30 minutes or more; or (ii) An outage of any fiber pair, including due to terminal equipment, on a cable segment occurs for four hours or more, regardless of the number of fiber pairs that comprise the total capacity of the cable segment. (2) An “outage” does not require reporting under this section if the outage is caused by announced planned maintenance and the licensee notified its customers in advance of the planned maintenance and its expected duration, except that if the planned maintenance duration surpasses the shortest announced duration for the planned maintenance and this additional time triggers the requirements in paragraph (a)(1) of this section, the outage becomes reportable as of the time the maintenance exceeds the shortest announced duration for the planned maintenance. (b) Outage reporting. (i) For a submarine cable that is jointly owned and operated by multiple licensees, the licensees of that cable may designate a Responsible Licensee that files outage reports under this rule on behalf of all licensees on the affected cable. (ii) Licensees opting to designate a Responsible Licensee must jointly notify the Chief of the Public Safety and Homeland Security Bureau's Cybersecurity and Communications Reliability Division of this decision in writing. Such Notification shall include the name of the submarine cable at issue; and contact information for all licensees on the submarine cable at issue, including the Responsible Licensee. (2) Notification, Interim, and Final Outage Reports shall be submitted by a person authorized by the licensee to submit such reports to the Commission. (i) The person submitting the Final Outage Report to the Commission shall also be authorized by the licensee to legally bind the provider to the truth, completeness, and accuracy of the information contained in the report. Each Final report shall be attested by the person submitting the report that he/she has read the report prior to submitting it and on oath deposes and states that the information contained therein is true, correct, and accurate to the best of his/her knowledge and belief and that the licensee on oath deposes and states that this information is true, complete, and accurate. (ii) The Notification is due within 480 minutes (8 hours) of the time of determining that an event is reportable for the first three years from the effective date of these rules. After three years from the effective date of the rules, Notifications shall be due within 240 minutes (4 hours). The Notification shall be submitted in good faith. Licensees shall provide: The name of the reporting entity; the name of the cable and a list of all licensees for that cable; the date and time of onset of the outage, if known (for planned events as defined in paragraph (a)(2) of this section, this is the estimated start time/date of the repair); a brief description of the event, including root cause if known; nearest cable landing station; best estimate of approximate location of the event, if known (expressed in either nautical miles and the direction from the nearest cable landing station or in latitude and longitude coordinates); best estimate of the duration of the event, if known; whether the event is related to planned maintenance; and a contact name, contact email address, and contact telephone number by which the Commission's technical staff may contact the reporting entity. (iii) The Interim Report is due within 24 hours of receiving the Plan of Work. The Interim Report shall be submitted in good faith. Licensees shall provide: The name of the reporting entity; the name of the cable; a brief description of the event, including root cause, if known; the date and time of onset of the outage; nearest cable landing station; approximate location of the event (expressed in either nautical miles and the direction from the nearest cable landing station or in latitude and longitude); best estimate of when the cable is scheduled to be repaired, including approximate arrival time and date of the repair ship, if applicable; a contact name, contact email address, and contact telephone number by which the Commission's technical staff may contact the reporting entity. (iv) The Final Outage Report is due seven (7) days after the repair is completed. The Final Outage Report shall be submitted in good faith. Licensees shall provide: The name of the reporting entity; the name of the cable; the date and time of onset of the outage (for planned events as defined in paragraph (a)(2) of this section, this is the start date and time of the repair); a brief description of the event, including the root cause if known; nearest cable landing station; approximate location of the event (expressed either in nautical miles and the direction from the nearest cable landing station or in latitude and longitude coordinates); duration of the event, as defined in paragraph (a) of this section; the restoration method; and a contact name, contact email address, and contact telephone number by which the Commission's technical staff may contact the reporting entity. If any required information is unknown at the time of submission of the Final Report but later becomes known, licensees should amend their report to reflect this knowledge. The Final Report must also contain an attestation as described in paragraph (b)(2)(i) of this section. (v) The Notification, Interim Report, and Final Outage Reports are to be submitted electronically to the Commission. “Submitted electronically” refers to submission of the information using Commission-approved Web-based outage report templates. If there are technical impediments to using the Web-based system during the Notification stage, then a written Notification to the Commission by email to the Chief, Public Safety and Homeland Security Bureau is permitted; such Notification shall contain the information required. Electronic filing shall be effectuated in accordance with procedures that are specified by the Commission by public notice. Notifications, Interim reports, and Final Reports may be withdrawn under legitimate circumstances, e.g., (c) Confidentiality. [81 FR 52363, Aug. 8, 2016, as amended at 85 FR 15740, Mar. 19, 2020; 86 FR 22361, Apr. 28, 2021] § 4.17 Mandatory Disaster Response Initiative. (a) Facilities-based mobile wireless providers are required to perform, or have established, the following procedures when: (1) Any entity authorized to declare Emergency Support Function 2 (ESF-2) activates ESF-2 for a given emergency or disaster; (2) The Commission activates the Disaster Information Reporting System (DIRS); or (3) The Commission's Chief of the Public Safety and Homeland Security Bureau issues a Public Notice activating the Mandatory Disaster Response Initiative in response to a state request to do so, where the state has also either activated its Emergency Operations Center, activated mutual aid or proclaimed a local state of emergency: (i) Provide for reasonable roaming under disaster arrangements (RuDs) when technically feasible, where: (A) A requesting provider's network has become inoperable and the requesting provider has taken all appropriate steps to attempt to restore its own network; and (B) The provider receiving the request (home provider) has determined that roaming is technically feasible and will not adversely affect service to the home provider's own subscribers, provided that existing roaming arrangements and call processing methods do not already achieve these objectives and that any new arrangements are limited in duration and contingent on the requesting provider taking all possible steps to restore service on its own network as quickly as possible; (ii) Establish mutual aid arrangements with other facilities-based mobile wireless providers for providing aid upon request to those providers during emergencies, where such agreements address the sharing of physical assets and commit to engaging in necessary consultation where feasible during and after disasters, provided that the provider supplying the aid has reasonably first managed its own network needs; (iii) Take reasonable measures to enhance municipal preparedness and restoration; (iv) Take reasonable measures to increase consumer readiness and preparation; and (v) Take reasonable measures to improve public awareness and stakeholder communications on service and restoration status. (b) Providers subject to the requirements of paragraph (a) of this section are required to perform annual testing of their roaming capabilities and related coordination processes, with such testing performed bilaterally with other providers that may foreseeably roam, or request roaming from, the provider during times of disaster or other exigency. (c) Providers subject to the requirements of paragraph (a) of this section are required to submit reports to the Commission detailing the timing, duration, and effectiveness of their implementation of the Mandatory Disaster Response Initiative's provisions in this section within 60 days of when the Public Safety and Homeland Security Bureau issues a Public Notice announcing such reports must be filed for providers operating in a certain geographic area in the aftermath of a disaster. (d) Providers subject to the requirements of paragraph (a) of this section are required retain RuDs for a period of at least one year after their expiration and supply copies of such agreements to the Commission promptly upon Commission request. (e) [Reserved] [87 FR 59339, Sept. 30, 2022, as amended at 89 FR 20869, Mar. 26, 2024; 91 FR 1403, Jan. 14, 2026] § 4.18 Mandatory Disaster Information Reporting System (DIRS) reporting. Link to an amendment published at 91 FR 39528, June 30, 2026. (a) Cable Communications, Wireline, Wireless, and Interconnected VoIP providers that own or operate their own facilities shall be required to report their infrastructure status information each day in the Disaster Information Reporting System (DIRS) when the Commission activates DIRS in geographic areas in which they provide service, even when their reportable infrastructure has not changed compared to the prior day. These providers are subject to mandated reporting in DIRS and shall: (1) Provide daily reports on their infrastructure status from the start of DIRS activation until DIRS has been deactivated. (2) [Reserved] (b) Facilities-based cable communications, wireline communications, wireless service, and interconnected VoIP providers who provide a DIRS report pursuant to paragraph (a) of this section are not required to make submissions in the Network Outage Reporting System (NORS) under this chapter pertaining to any outage that occurs in an area in which the Commission has activated DIRS, as long as the first daily DIRS report for the activation is due before the NORS submission under section 4.9 of this chapter would be due for the outage, and the outage is timely reported in DIRS. Subject providers shall be notified that DIRS is activated and deactivated pursuant to Public Notice from the Commission and/or the Public Safety and Homeland Security Bureau. [89 FR 25542, Apr. 11, 2024, as amended at 90 FR 6840, Jan. 21, 2025; 90 FR 44564, Sept. 16, 2025; 91 FR 39528, June 30, 2026]