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SIP Provider
SIP Provider DE
SIP Provider DE
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SIP Provider NetCologne (DE)
SIP Provider NetCologne TLS (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 Versatel (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)
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