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SIP Provider 4TS (CH)
SIP Provider A1 Telekom (AT)
SIP Provider Drei (AT)
SIP Provider IP Austria (AT)
SIP Provider media.tel (AT)
SIP Provider myTweak (AT)
SIP Provider net-cloud (AT)
SIP Provider Netvoip (CH)
SIP Provider netvoip Voice SIP Connect (CH)
SIP Provider Nexphone (CH)
SIP Provider NFON (AT/CH)
SIP Provider PCH (AT)
SIP Provider peoplefone (AT)
SIP Provider peoplefone (CH)
SIP Provider Plusviereins (CH)
SIP Provider Quickline (CH)
SIP Provider Russmedia IT (AT)
SIP Provider sipcall (CH)
SIP Provider SolNet (CH)
SIP Provider Sunrise (CH)
SIP Provider Swisscom (CH) - Business Connect
SIP Provider Swisscom (CH) - Enterprise SIP
SIP Provider Swisscom (CH) - SBCon Internet Trunk
SIP Provider Swisscom (CH) - Smart Business Connect
SIP Provider T-Mobile Austria (AT)
SIP Provider Tele-Tec (AT)
SIP Provider Tele2 (AT)
SIP Provider UPC Cablecom (CH)
SIP Provider UPC Cablecom, Registered (CH)
SIP Provider Virtual-Call (AT/CH)