Source note · Troubleshooting SIP 403 Forbidden from a carrier
RFC 8588 defines the SHAKEN attest claim with three values, A, B and C, corresponding to Full Attestation, Partial Attestation and Gateway Attestation.
Checked 2026-09-30
These values correspond to 'Full Attestation', 'Partial Attestation', and 'Gateway Attestation', respectively.
- Vendor
- IETF
- Product
- SHAKEN PASSporT
- Subsystem
- PASSporT shaken extension
- Deployment
- any
- Region
- not restricted
- Release range
- current as of 2026-09-30
- Checked
- 2026-09-30
Sources
- RFC 8588: Personal Assertion Token (PaSSporT) Extension for Signature-based Handling of Asserted information using toKENs (SHAKEN) — IETF / RFC Editor · tier 1 standards and regulators · section 4
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting SIP 403 Forbidden from a carrier: source note sip-403-forbidden-troubleshooting-rfc8588-attest-values. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-403-forbidden-troubleshooting-rfc8588-attest-values
BibTeX
@misc{warmtransfer-claim-sip-403-forbidden-troubleshooting-rfc8588-attest-values,
title = {Troubleshooting SIP 403 Forbidden from a carrier: source note sip-403-forbidden-troubleshooting-rfc8588-attest-values},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-403-forbidden-troubleshooting-rfc8588-attest-values},
note = {Source note sip-403-forbidden-troubleshooting-rfc8588-attest-values, checked 2026-09-30}
}