SIP Provider DE
- SIP Provider intersaar (DE)
- SIP Provider inexio (DE)
- SIP Provider HFO Telecom, NGN (DE)
- SIP Provider GELSEN-NET (DE)
- SIP Provider EWETEL (DE)
- SIP Provider equada GmbH (DE)
- SIP Provider EmslandTel.net (DE)
- SIP Provider VSE NET (DE)
- SIP Provider echtschnell (DE)
- SIP Provider easybell (DE)
- SIP Provider DOKOMO21 (DE)
- SIP Provider DNS:NET (DE)
- SIP Provider Deutsche Telekom, SIP Trunk & SIP Trunk Pure (DE)
- SIP Provider willy.tel (DE)
- SIP Provider Deutsche Telekom, Call & Surf Connection (DE)
- SIP Provider wilhelm.tel (DE)
- SIP Provider Deutsche Telefon (DE)
- SIP Provider COLT (DE)
- SIP Provider M-net (DE)
- SIP Provider Vodafone (DE)
- SIP Provider Toplink (DE)
- SIP Provider TNG (DE)
- SIP Provider Teleforte (DE)
- SIP Provider reventix (DE)
- SIP Provider R-KOM (DE)
- SIP Provider Plusnet (DE), IPfonie Extended Connect
- SIP Provider Plusnet (DE) , IPFonie extended
- SIP Provider O2 All-IP Voice SIP (DE)
- SIP Provider NetCom BW (DE)
- SIP Provider NetCologne (DE)