IPKall (original) (raw)

IPKall was a public switched telephone network to voice over IP call forwarding service. Users were able to register with the service to obtain a phone number chosen from several Washington State area codes and have all calls to that number forwarded to their Session Initiation Protocol or Inter-Asterisk eXchange uniform resource identifier, including an Asterisk server. IPKall's popularity stemmed from the fact that it was probably the last remaining, widely accessible US-based VoIP service offering free-of-charge PSTN numbers.