| 2400:4041:: | 2400:40ff:ffff:ffff:ffff:ffff:ffff:ffff | NTT DOCOMO BUSINESS,Inc. |
| 2400:4100:: | 2400:4100:3ff:ffff:ffff:ffff:ffff:ffff | NTT COMMUNICATIONS CORPORATION |
| 2400:4100:400:: | 2400:4100:400:ffff:ffff:ffff:ffff:ffff | XING INC. |
| 2400:4100:401:: | 2400:4100:ffff:ffff:ffff:ffff:ffff:ffff | NTT COMMUNICATIONS CORPORATION |
| 2400:4101:: | 2400:4101:ffff:ffff:ffff:ffff:ffff:ffff | NTT COMMUNICATIONS CORPORATION |
| 2400:4102:: | 2400:4102:3ff:ffff:ffff:ffff:ffff:ffff | NTT COMMUNICATIONS CORPORATION |
| 2400:4102:400:: | 2400:4102:400:ffff:ffff:ffff:ffff:ffff | S-Cube Corporation |
| 2400:4102:401:: | 2400:4102:401:ffff:ffff:ffff:ffff:ffff | NTT COMMUNICATIONS CORPORATION |
| 2400:4102:402:: | 2400:4102:402:ffff:ffff:ffff:ffff:ffff | TV Shizuoka System Creates Corporation |
| 2400:4102:403:: | 2400:4102:403:ffff:ffff:ffff:ffff:ffff | NTT COMMUNICATIONS CORPORATION |