IP Addresses for Allow Lists

In most cases you should not need to configure an allow list for GTP Services. However, if you’re having issues with connectivity to some GTP Services you should add the following IPs to your firewall allow list. We’ve included IPs for GTP Services as well as those used for our service provider Microsoft Azure. In all cases we use a minimum of TLS 1.2 and port 443.

Inbound Calls

When you are connecting to our services the following IP addresses can be used:

GTP Services

20.81.121.121, 20.171.225.158

Microsoft Azure

20.40.229.4

Outbound Responses

When you are receiving a response from our services the following IP addresses can be used:

GTP Services

20.75.136.112/28, 20.125.92.32/28

Microsoft Azure

20.40.229.4