LaunchTelephony

Egress IP addresses

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When Synthflow connects to your infrastructure (webhooks, custom actions, MCP servers, or any other outbound HTTP request), traffic originates from a fixed set of IP addresses. If your network requires an allow-list for inbound connections, add the addresses below for your region.

Synthflow operates three regions: Global, US, and EU. Only allow-list the addresses for the region your workspace is in. You can find your region under Settings > Preferences > Customer Region in the Synthflow portal.

These addresses cover platform-level outbound traffic (API callbacks, webhooks, MCP, custom actions). For SIP signalling and RTP media addresses, see SIP Trunking Network ACL.

Egress addresses by region

Egress IP
34.75.13.71
34.74.126.13
34.139.172.104
34.139.35.82
34.23.52.21
35.243.188.164
104.196.154.68
34.75.98.89
34.75.163.76
34.75.64.8
34.73.214.36
34.139.44.238
34.138.49.101
34.138.46.87
34.73.237.242
34.73.234.92
34.73.106.37
34.139.173.176