SIP Provider DE
- SIP Provider NetCologne (DE)
- SIP Provider NetCom BW (DE)
- SIP Provider NFON (DE)
- SIP Provider O2 All-IP Voice SIP (DE)
- SIP Provider OnPoint-IT (DE)
- SIP Provider Outbox AG (DE)
- SIP Provider Peoplefone (DE)
- SIP Provider Plusnet (DE) , IPFonie extended
- SIP Provider Plusnet (DE), IPfonie Extended Connect
- SIP Provider PYUR Business (DE)
- SIP Provider R-KOM (DE)
- SIP Provider RelAix (DE)
- SIP Provider reventix (DE)
- SIP Provider sipgate (DE)
- SIP Provider SKYTRON (DE)
- SIP Provider SWE (DE)
- SIP Provider T-M-Net (DE)
- SIP Provider Tele-Tec (DE)
- SIP Provider Teleforte (DE)
- SIP Provider TNG (DE)
- SIP Provider Toplink (DE)
- SIP Provider Virtual-Call (DE)
- SIP Provider Vodafone R.4a (DE)
- SIP Provider Vodafone R.6 (DE)
- SIP Provider Voiceworks (DE)
- SIP Provider VSE NET (DE)
- SIP Provider wilhelm.tel (DE)
- SIP Provider willy.tel (DE)
- Swyx Trunk (DE)