We have a special web service that returns IP addresses of the servers used for different purposes:
http://api.voximplant.com/getMediaResources.
To get the list of addresses where SIP comes from (SBCS):
http://api.voximplant.com/getMediaResources?with_sbcs.
To get the list of addresses where RTP (media) comes from (Media Servers):
http://api.voximplant.com/getMediaResources?with_mediaservers.
To get the list of addresses used by SDKs (Web/Mobile):
http://api.voximplant.com/getMediaResources?with_webgateways.
To get the list of addresses where HTTP requests from JS scenarios come from:
http://api.voximplant.com/getMediaResources?with_jsservers.
You can also combine parameters to get more information on a specific request.