Teams Direct Routing Microsoft response code 511404 with SIP 404 ('Getting user info by number from RuntimeAPI failed') means the user could not be found during the reverse number lookup.
Checked 2026-10-02
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- Response codes
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- SIP 404 and Microsoft response codes - Microsoft Teams — Microsoft · tier 2 current vendor documentation · Section '511404 404 Getting user info by number from RuntimeAPI failed'
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting SIP 404 Not Found and 484 Address Incomplete call failures: source note sip-404-484-troubleshooting-teams-511404. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-404-484-troubleshooting-teams-511404
BibTeX
@misc{warmtransfer-claim-sip-404-484-troubleshooting-teams-511404,
title = {Troubleshooting SIP 404 Not Found and 484 Address Incomplete call failures: source note sip-404-484-troubleshooting-teams-511404},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-404-484-troubleshooting-teams-511404},
note = {Source note sip-404-484-troubleshooting-teams-511404, checked 2026-10-02}
}