| 212.220.50.0 | 212.220.50.255 | Bank Severnaya Kazna Yekaterinburg Russia |
| 212.220.51.0 | 212.220.51.255 | JSC "Uralauto" Ekaterinburg Russia |
| 212.220.52.0 | 212.220.52.255 | JSC "Ural Air Lines" Ekaterinburg Russia |
| 212.220.53.0 | 212.220.53.15 | Skip Co. Ltd. Ekaterinburg, Sverdlovsk region, R.. |
| 212.220.53.16 | 212.220.53.23 | Fulcrum Co. Ltd. Ekaterinburg, Sverdlovsk region.. |
| 212.220.53.24 | 212.220.53.31 | Educational book Co. Ltd. Kamensk-Uralskiy, Sver.. |
| 212.220.53.32 | 212.220.53.63 | Unit-service Co. Ltd. Ekaterinburg, Sverdlovsk r.. |
| 212.220.53.64 | 212.220.53.95 | Kvartet-buro plus Co. Ltd. Ekaterinburg, Sverdlo.. |
| 212.220.53.96 | 212.220.53.103 | Locomotive Diesel engine Service maintenance dep.. |
| 212.220.53.104 | 212.220.53.111 | PEMKO The operator of local communication Karpin.. |