Source note · Troubleshooting SIP 403 Forbidden from a carrier
Telnyx returns 403 with cause code D41 when the dialed number matches a forbidden prefix used for fraud prevention and with D58 when the destination number is restricted; both direct the customer to Telnyx support.
Checked 2026-09-30
- Vendor
- Telnyx
- Product
- SIP Trunking
- Subsystem
- destination blocking
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-30
- Checked
- 2026-09-30
Sources
- Telnyx SIP Response Codes — Telnyx · tier 2 current vendor documentation · 403 list, cause codes D41 and D58
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting SIP 403 Forbidden from a carrier: source note sip-403-forbidden-troubleshooting-telnyx-d41-d58. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-403-forbidden-troubleshooting-telnyx-d41-d58
BibTeX
@misc{warmtransfer-claim-sip-403-forbidden-troubleshooting-telnyx-d41-d58,
title = {Troubleshooting SIP 403 Forbidden from a carrier: source note sip-403-forbidden-troubleshooting-telnyx-d41-d58},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-403-forbidden-troubleshooting-telnyx-d41-d58},
note = {Source note sip-403-forbidden-troubleshooting-telnyx-d41-d58, checked 2026-09-30}
}