| 2400:4115:: | 2400:4115:ffff:ffff:ffff:ffff:ffff:ffff | NTT COMMUNICATIONS CORPORATION |
| 2400:4116:: | 2400:4116:400:ffff:ffff:ffff:ffff:ffff | NTT COMMUNICATIONS CORPORATION |
| 2400:4116:401:: | 2400:4116:401:ffff:ffff:ffff:ffff:ffff | Ikoi Inc. |
| 2400:4116:402:: | 2400:4116:ffff:ffff:ffff:ffff:ffff:ffff | NTT COMMUNICATIONS CORPORATION |
| 2400:4117:: | 2400:411c:ffff:ffff:ffff:ffff:ffff:ffff | NTT COMMUNICATIONS CORPORATION |
| 2400:411d:: | 2400:411d:ffff:ffff:ffff:ffff:ffff:ffff | NTT COMMUNICATIONS CORPORATION |
| 2400:411e:: | 2400:413f:ffff:ffff:ffff:ffff:ffff:ffff | NTT DOCOMO BUSINESS,Inc. |
| 2400:4140:: | 2400:4140:2001:ffff:ffff:ffff:ffff:ffff | NTT COMMUNICATIONS CORPORATION |
| 2400:4140:2002:: | 2400:4140:2002:ffff:ffff:ffff:ffff:ffff | NTT DATA CORPORATION |
| 2400:4140:2003:: | 2400:4140:3003:ffff:ffff:ffff:ffff:ffff | NTT COMMUNICATIONS CORPORATION |