It is recommended that you add ALL of VOXO’s following IP address ranges and ports on your firewall for real-time traffic. This is important if you have Numbers and devices in different regions and for resiliency purposes (e.g. if North America Atlanta gateways are down, then North America Chicago gateways will be used). VOXO does not guarantee which region the media will egress from since it can depend on which PSTN-SIP Gateway delivers the call to which VOXO region.
“
Global Subnet
(NEW; takes effect 3/1/2026)
140.235.248.0/24
us-east1
35.196.54.85
34.148.222.24
34.73.78.180
us-east4
35.186.160.145
34.150.150.6
34.86.247.46
us-central1
35.222.110.103
34.68.84.223
35.184.145.167
us-south1
34.174.151.12
34.174.6.120
34.174.181.61
us-west1
35.203.170.238
34.168.9.91
34.82.42.98
us-west2
34.94.212.85
34.102.68.194
35.236.36.140
DNS
connect.voxo.co
portal.voxo.co
app.voxo.co
api.voxo.co
`rps.yealink.com```
PORTS
443 (TCP)
5060 (TCP)
8060 TCP
5060 (UDP)
8060 (UDP)
10,000 - 60,000 (UDP)
STUN Servers
stun.l.google.com:19302
stun1.l.google.com:19302
stun2.l.google.com:19302
stun3.l.google.com:19302
stun4.l.google.com:19302
UDP: stun.voxo.co:3478, 53
UDP: turn.voxo.co:3478, 53
TCP: turn.voxo.co:3478, 80 
