Source note · SIP scanning and telephony denial of service
Direct Routing SIP signaling FQDNs for Microsoft 365, Office 365 and GCC resolve to 52.112.0.0/14 and 52.120.0.0/14, and to 2603:1063:400::/40 for IPv6.
Checked 2026-09-25
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- SIP signaling
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Plan Direct Routing — Microsoft (Microsoft Learn) · tier 2 current vendor documentation · SIP signaling: FQDNs
Cite this note
APA
WarmTransfer. (2026, September 25). SIP scanning and telephony denial of service: source note sip-scanning-tdos-ms-dr-signaling-ranges. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-scanning-tdos-ms-dr-signaling-ranges
BibTeX
@misc{warmtransfer-claim-sip-scanning-tdos-ms-dr-signaling-ranges,
title = {SIP scanning and telephony denial of service: source note sip-scanning-tdos-ms-dr-signaling-ranges},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-scanning-tdos-ms-dr-signaling-ranges},
note = {Source note sip-scanning-tdos-ms-dr-signaling-ranges, checked 2026-09-25}
}