RFC 8224 defines response codes 428 Use Identity Header, 436 Bad Identity Info, 437 Unsupported Credential and 438 Invalid Identity Header.
Checked 2026-10-02
- Vendor
- not restricted
- Product
- not restricted
- Subsystem
- Identity header
- Deployment
- multi-tenant, on-premises
- Region
- not restricted
- Release range
- RFC 8224
- Checked
- 2026-10-02
Sources
- RFC 8224: Authenticated Identity Management in the Session Initiation Protocol (SIP) — IETF / RFC Editor · tier 1 standards and regulators · Response code definitions (Section 6.2.2 area; section not confirmed)
Cite this note
APA
WarmTransfer. (2026, October 2). SIP identity headers: P-Asserted-Identity and Diversion and History-Info: source note sip-identity-headers-stir-error-codes. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-identity-headers-stir-error-codes
BibTeX
@misc{warmtransfer-claim-sip-identity-headers-stir-error-codes,
title = {SIP identity headers: P-Asserted-Identity and Diversion and History-Info: source note sip-identity-headers-stir-error-codes},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-identity-headers-stir-error-codes},
note = {Source note sip-identity-headers-stir-error-codes, checked 2026-10-02}
}