Microsoft instructs that the firewall allow signaling to and from all Microsoft Teams IP ranges (52.112.0.0/14 and 52.120.0.0/14 for commercial clouds), not only the addresses DNS returns.
Checked 2026-09-24
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- network
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Plan Direct Routing — Microsoft (Microsoft Learn) · tier 2 current vendor documentation · SIP signaling: FQDNs, Important note
Cite this note
APA
WarmTransfer. (2026, September 24). Building a hybrid Unified CM and Teams Phone environment for a phased migration: source note cucm-teams-hybrid-build-plan-firewall-ranges. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-teams-hybrid-build-plan-firewall-ranges
BibTeX
@misc{warmtransfer-claim-cucm-teams-hybrid-build-plan-firewall-ranges,
title = {Building a hybrid Unified CM and Teams Phone environment for a phased migration: source note cucm-teams-hybrid-build-plan-firewall-ranges},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-teams-hybrid-build-plan-firewall-ranges},
note = {Source note cucm-teams-hybrid-build-plan-firewall-ranges, checked 2026-09-24}
}