Source note · Troubleshooting SIP 403 Forbidden from a carrier
For Microsoft response code 510559 with SIP 403 (No viable path), Microsoft says to make sure the dialed number matches a number pattern in a voice route for the user, and notes the error can come from a misdialed number or a customer policy that prevents calls to specific countries, regions or number patterns.
Checked 2026-09-30
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- voice routing
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-30
- Checked
- 2026-09-30
Sources
- SIP 403 and Microsoft response codes - Microsoft Teams — Microsoft · tier 2 current vendor documentation · 510559 403 Get Outbound routing - No viable path (Forbidden)
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting SIP 403 Forbidden from a carrier: source note sip-403-forbidden-troubleshooting-ms-510559. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-403-forbidden-troubleshooting-ms-510559
BibTeX
@misc{warmtransfer-claim-sip-403-forbidden-troubleshooting-ms-510559,
title = {Troubleshooting SIP 403 Forbidden from a carrier: source note sip-403-forbidden-troubleshooting-ms-510559},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-403-forbidden-troubleshooting-ms-510559},
note = {Source note sip-403-forbidden-troubleshooting-ms-510559, checked 2026-09-30}
}