KDDI-IP Phone
Partner IP phone service (free connection)
| Ministry of Internal Affairs and Communications 050 Number Designated Business |
|---|
| KDDI CORPORATION |
| SoftBank Corp |
| Rakuten Mobile, Inc. |
| STNet, Inc. |
| K-Opticom Corporation |
| Enecom,Inc. |
| ITEC Hankyu Hanshin Co., Ltd. |
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