The FCC's 2020 STIR/SHAKEN order describes partial (B) attestation as the provider being able to confirm the identity of the subscriber but not the telephone number.
Checked 2026-10-02
- Vendor
- not restricted
- Product
- not restricted
- Subsystem
- FCC caller ID authentication rules
- Deployment
- carrier
- Region
- us
- Release range
- FCC 20-42
- Checked
- 2026-10-02
Sources
- Call Authentication Trust Anchor; Implementation of TRACED Act Section 6(a)—Knowledge of Customers by Entities With Access to Numbering Resources (85 FR 22029) — Federal Communications Commission via Office of the Federal Register (GovInfo) · tier 1 standards and regulators · paragraph 8, 85 FR 22031
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting STIR/SHAKEN attestation levels on outbound calls: source note stir-shaken-attestation-troubleshooting-fcc-b-def. WarmTransfer. https://warmtransfer.net/knowledge/claims/stir-shaken-attestation-troubleshooting-fcc-b-def
BibTeX
@misc{warmtransfer-claim-stir-shaken-attestation-troubleshooting-fcc-b-def,
title = {Troubleshooting STIR/SHAKEN attestation levels on outbound calls: source note stir-shaken-attestation-troubleshooting-fcc-b-def},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/stir-shaken-attestation-troubleshooting-fcc-b-def},
note = {Source note stir-shaken-attestation-troubleshooting-fcc-b-def, checked 2026-10-02}
}