The latest service introduced by Finarea SA. Like VoipBuster it’s offered for access through a softphone, but can also be used with a standard SIP client, including Asterisk (this mode is undeclared and not officially supported). The domain name of the SIP proxy/registrar is sip.voipstunt.com , and resolves to the same set of IP addresses as sip1.sipdiscount.com. The server is not Asterisk-based, only supports G.711 and G.726 codecs (GSM announced as available soon), and does not speak IAX. Only dtmfmode=inband is supported.

The domain name connectionserver.voipstunt.com, used by the softphone client for Windows, resolves to a set of IP addresses larger than sip.voipstunt.com, and some of the hosts in that set only seem to support the undocumented protocol used by the softphone client, not the SIP protocol.