47 CFR part 64 subpart HH — Caller ID Authentication

Publisher

Office of the Federal Register / eCFR

URL

https://www.ecfr.gov/current/title-47/chapter-I/subchapter-B/part-64/subpart-HH

Published

2026-09-14

Updated

unknown

Accessed

2026-09-16

HTTP status

200

License

United States government work, not subject to copyright; permitted

Source notes citing this source

• 47 CFR 64.6301(a) requires voice service providers to authenticate caller ID for SIP calls they originate and to verify caller ID for SIP calls they receive, with STIR/SHAKEN implemented in their IP networks by June 30, 2021. in context
• 47 CFR 64.6300 defines a gateway provider as a United States based intermediate provider that receives a call directly from a foreign originating or intermediate provider at its United States facilities before passing it downstream to another United States provider, and an intermediate provider as any entity that carries or processes traffic traversing the public switched telephone network while neither originating nor terminating it. in context
• 47 CFR 64.6301 requires a voice service provider to obtain a Service Provider Code token from the Secure Telephone Identity Policy Administrator and use it to obtain a certificate from a Secure Telephone Identity Certificate Authority, then to authenticate and verify caller identification information for all SIP calls that transit only its own network, to authenticate it for all SIP calls it originates and hand them on with that information where technically feasible, and to verify it for all authenticated SIP calls it terminates. in context
• 47 CFR 64.6307 prohibits voice service providers from adding any additional line item charge to consumer or small business customer subscribers for the effective call authentication technology required by 47 CFR 64.6301 and 64.6303. in context
• 47 CFR 64.6303 gives a voice service provider with non-internet-protocol network portions 2 ways to comply by 30 June 2021: upgrade the entire network to carry SIP calls and implement STIR/SHAKEN throughout, or maintain and be ready to provide documented proof of participation in a working group, industry standards group or consortium developing or actively testing a non-IP caller identity authentication solution. in context
• 47 CFR 64.6301(b) permits a voice service provider to meet its authentication obligation through a third-party authentication service, provided the third party signs all calls using the provider's own certificate, the provider makes all attestation-level decisions for each SIP call it originates, and the agreement is memorialised in writing specifying the third party's tasks and confirming both conditions. in context

Cite this source record

APA

WarmTransfer. (2026, September 14). 47 CFR part 64 subpart HH — Caller ID Authentication. WarmTransfer. https://warmtransfer.net/knowledge/sources/ecfr-47-cfr-64-subpart-hh

BibTeX

@misc{warmtransfer-ecfr-47-cfr-64-subpart-hh,
  title  = {47 CFR part 64 subpart HH — Caller ID Authentication},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/ecfr-47-cfr-64-subpart-hh},
  note   = {Office of the Federal Register / eCFR, accessed 2026-09-16}
}