| 2400:4040:5017:: | 2400:4040:5017:ffff:ffff:ffff:ffff:ffff | Ministry of Foreign Affairs |
| 2400:4040:5018:: | 2400:4040:5023:ffff:ffff:ffff:ffff:ffff | NTT COMMUNICATIONS CORPORATION |
| 2400:4040:5024:: | 2400:4040:5024:ffff:ffff:ffff:ffff:ffff | International Systems Research Co. |
| 2400:4040:5025:: | 2400:4040:5031:ffff:ffff:ffff:ffff:ffff | NTT COMMUNICATIONS CORPORATION |
| 2400:4040:5032:: | 2400:4040:5032:ffff:ffff:ffff:ffff:ffff | TOKYO METROPOLITAN POLICE DEPARTMENT |
| 2400:4040:5033:: | 2400:4040:5033:ffff:ffff:ffff:ffff:ffff | NTT Communications Corporation |
| 2400:4040:5034:: | 2400:4040:5034:ffff:ffff:ffff:ffff:ffff | NTT COMMUNICATIONS CORPORATION |
| 2400:4040:5035:: | 2400:4040:5037:ffff:ffff:ffff:ffff:ffff | NTT Communications CorporationNetwork Service De.. |
| 2400:4040:5038:: | 2400:4040:5038:ffff:ffff:ffff:ffff:ffff | NTT Security (Japan) KK |
| 2400:4040:5039:: | 2400:4040:5039:ffff:ffff:ffff:ffff:ffff | NTT Communications Corporation |