Source note · Troubleshooting Zoom Phone
Zoom's firewall rules for Zoom Phone list outbound TCP 390 from Zoom clients for company directory search.
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 390 row
Cite this note
APA
WarmTransfer. (2026, September 25). Troubleshooting Zoom Phone: source note zoom-phone-troubleshooting-fw-tcp-390. WarmTransfer. https://warmtransfer.net/knowledge/claims/zoom-phone-troubleshooting-fw-tcp-390
BibTeX
@misc{warmtransfer-claim-zoom-phone-troubleshooting-fw-tcp-390,
title = {Troubleshooting Zoom Phone: source note zoom-phone-troubleshooting-fw-tcp-390},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/zoom-phone-troubleshooting-fw-tcp-390},
note = {Source note zoom-phone-troubleshooting-fw-tcp-390, checked 2026-09-25}
}