Call Authentication Trust Anchor (Federal Register 2025-15809; FCC 24-120)

Publisher

Office of the Federal Register via GovInfo

URL

https://www.govinfo.gov/content/pkg/FR-2025-08-19/html/2025-15809.htm

Published

2025-08-19

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

US government work; public domain; public-domain text; short excerpts and locators used anyway

Source notes citing this source

• The Federal Register publication of FCC 24-120 gives September 18, 2025 as the effective date of the third-party authentication rules. in context
• In the Federal Register text of FCC 24-120, A-level attestation requires the originating provider to have a direct authenticated relationship with the customer, be able to identify it, and have verified that the customer has a legitimate right to use the telephone number. in context
• FCC 24-120 states that the attestation-level determination requires the originating provider's due diligence on its own customer and cannot be made by a third party with no relationship to that customer. in context
• Under FCC 24-120, a provider with a STIR/SHAKEN obligation may use a third party to sign calls, but every call must be signed with the obligated provider's own certificate and the provider must make the attestation-level decisions. in context
• A US originating provider can give A-level attestation to a substituted or presentation number only if it has verified the customer's right to use that number. A number the enterprise does not hold with that provider, such as one ported elsewhere or belonging to a third party, is likely to be signed below A or to be screened. inferred in context

Cite this source record

APA

WarmTransfer. (2025, August 19). Call Authentication Trust Anchor (Federal Register 2025-15809; FCC 24-120). WarmTransfer. https://warmtransfer.net/knowledge/sources/govinfo-fr-2025-15809-third-party-auth

BibTeX

@misc{warmtransfer-govinfo-fr-2025-15809-third-party-auth,
  title  = {Call Authentication Trust Anchor (Federal Register 2025-15809; FCC 24-120)},
  author = {{WarmTransfer}},
  year   = {2025},
  url    = {https://warmtransfer.net/knowledge/sources/govinfo-fr-2025-15809-third-party-auth},
  note   = {Office of the Federal Register via GovInfo, accessed 2026-09-25}
}