Source note · Troubleshooting Zoom Phone
Zoom's firewall rules for Zoom Phone require outbound TCP 443 from all Zoom clients and the user's web browser to Zoom's published IPv4 and IPv6 ranges.
Checked 2026-09-25
- Vendor
- Zoom
- Product
- Zoom Phone
- Subsystem
- network-firewall
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Zoom network firewall or proxy server settings — Zoom Communications · tier 2 current vendor documentation · section 'Firewall rules for Zoom Phone', TCP 443 row
Cite this note
APA
WarmTransfer. (2026, September 25). Troubleshooting Zoom Phone: source note zoom-phone-troubleshooting-fw-tcp-443. WarmTransfer. https://warmtransfer.net/knowledge/claims/zoom-phone-troubleshooting-fw-tcp-443
BibTeX
@misc{warmtransfer-claim-zoom-phone-troubleshooting-fw-tcp-443,
title = {Troubleshooting Zoom Phone: source note zoom-phone-troubleshooting-fw-tcp-443},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/zoom-phone-troubleshooting-fw-tcp-443},
note = {Source note zoom-phone-troubleshooting-fw-tcp-443, checked 2026-09-25}
}