To ensure that your communication infrastructure doesn’t block communication with Plivo, we encourage you to whitelist these IP address ranges for Messaging API. Subscribe to be notified of any updates regarding IP address changes via email or RSS feed.

​
Callbacks from Plivo

Some Plivo APIs elements support callback events. To make sure those callbacks are not blocked, allow traffic from these Plivo IP addresses to your web applications. These IP addresses are NAT gateway IPs associated with our HTTP(s) OutProxy instance.
RegionsIP Addresses
Ashburn, Virginia, USA18.211.55.148/32
18.211.27.222/32
San Jose, California, USA13.56.175.187/32
13.57.139.231/32