| 62.141.8.0/23 | Deutsche Telekom / ex GTS Central Europe |  |
| 62.141.12.0/24 | T-Mobile Czech Business Solutions | |
| 62.141.17.0/24 | T-Mobile Czech Business Solutions | |
| 89.24.96.0/19 | T-Mobile Czech Business Solutions | |
| 93.153.100.0/23 | GPRS/UMTS customer network | |
| 93.153.124.0/22 | B2B Customers | |
| 139.181.142.0/24 | Deutsche Telekom / ex GTS Central Europe | |
| 217.20.128.0/20 | Deutsche Telekom / ex GTS Central Europe | |
| 217.116.32.0/20 | Deutsche Telekom / ex GTS Central Europe | |
| 5.56.33.0/24 | 3 in 1 Hosting Bt - Datanet | |
| 5.56.37.0/24 | 3 in 1 Hosting Bt - Datanet | |
| 5.56.38.0/24 | 3 in 1 Hosting Bt - Datanet | |
| 46.13.0.0/20 | T-Mobile Czech Business Solutions | |
| 91.120.0.0/16 | Deutsche Telekom / ex GTS Central Europe | |
| 91.139.0.0/20 | T-Mobile Czech Business Solutions | |
| 91.198.111.0/24 | Deutsche Telekom / ex GTS Central Europe | |
| 91.208.36.0/24 | Deutsche Telekom / ex GTS Central Europe | |
| 178.183.224.0/19 | statically assigned space | |
| 193.9.27.0/24 | Deutsche Telekom / ex GTS Central Europe | |
| 193.138.127.0/24 | Deutsche Telekom / ex GTS Central Europe | |
| 193.169.16.0/23 | Deutsche Telekom / ex GTS Central Europe | |
| 194.88.32.0/19 | Deutsche Telekom / ex GTS Central Europe | |
| 194.88.37.0/24 | Deutsche Telekom / ex GTS Central Europe | |
| 194.149.0.0/19 | Deutsche Telekom / ex GTS Central Europe | |
| 195.47.7.0/24 | Deutsche Telekom / ex GTS Central Europe | |
| 195.47.74.0/24 | Deutsche Telekom / ex GTS Central Europe | |
| 195.56.0.0/16 | Deutsche Telekom / ex GTS Central Europe | |
| 195.70.32.0/19 | Deutsche Telekom / ex GTS Central Europe | |
| 195.90.98.0/24 | Deutsche Telekom / ex GTS Central Europe | |
