• Is it possible to call anywhere from IP-Phone-C?
    Fixed phones, cellular phones, and PHS can be called from IP-Phone-C and international calls can also be made from IP-Phone-C.
    If you are calling IP-Phone users, users of affiliated ISPs using NTT Communication's VoIP infrastructure and users of affiliated VoIP platforms can be called.

    However, some IP-Phone services are outside scope of the IP-Phone-C service and so cannot be called. These number can be called from the fixed telephone line.

    Please find more information here:
    >> Numbers Outside the Scope of IP-Phone-C Service