Regional telephone carriers
Regional telephone carrier (direct telephone line)
- ・Tohoku Intelligent Communications
- ・Optage
- ・STNet
- ・Verizon Japan
- ・NTT Communications
- ・ZIP Telecom
- ・Energia Communications
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- ・Kyushu Communication Network
- ・Chubu Telecommunications
- ・SoftBank Telecom
- ・UCOM
- ・Fusion Communications
- ・K.V.H.
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IP Telephone Providers
- ※The IP phones in the table refer to calls to IP phones (050 numbers) provided by the following carriers.
- ・NTT Communications
- ・SoftBank Telecom
- ・Tohoku Intelligent Communications
- ・Optage
- ・STNet
- ・SoftBank BB
- ・NTT Plala
- ・NTT Docomo
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- ・KDDI
- ・Fusion Communications
- ・Kyushu Communication Network
- ・Chubu Telecommunications
- ・NTT-ME
- ・ZIP Telecom
- ・UCOM
- ・Energia Communications
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