Microsoft 365 endpoint set ID 11 (Teams, Optimize Required) lists UDP 3478-3481 to 52.112.0.0/14, 52.122.0.0/15 and 2603:1063::/38; this is a different port list from the UDP 49152-53247 range the SIP Gateway configure article specifies.
Checked 2026-10-02
- Vendor
- Microsoft
- Product
- Microsoft 365
- Subsystem
- network
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- endpoint data last updated 2026-08-14
- Checked
- 2026-10-02
Sources
- Microsoft 365 URLs and IP address ranges — Microsoft · tier 2 current vendor documentation · Microsoft 365 URLs and IP address ranges > Microsoft Teams table > ID 11
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting phones signing in through Teams SIP Gateway: source note teams-sip-gateway-troubleshooting-m365-teams-udp-3478. WarmTransfer. https://warmtransfer.net/knowledge/claims/teams-sip-gateway-troubleshooting-m365-teams-udp-3478
BibTeX
@misc{warmtransfer-claim-teams-sip-gateway-troubleshooting-m365-teams-udp-3478,
title = {Troubleshooting phones signing in through Teams SIP Gateway: source note teams-sip-gateway-troubleshooting-m365-teams-udp-3478},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/teams-sip-gateway-troubleshooting-m365-teams-udp-3478},
note = {Source note teams-sip-gateway-troubleshooting-m365-teams-udp-3478, checked 2026-10-02}
}