| 80.188.0.0/16 | O2 Czech Republic, a.s. |  |
| 80.188.0.0/17 | O2 Czech Republic, a.s. | |
| 80.188.40.0/24 | O2 Czech Republic, a.s. | |
| 80.188.128.0/17 | O2 Czech Republic, a.s. | |
| 80.188.222.0/24 | O2 Czech Republic, a.s. | |
| 81.90.160.0/20 | O2 Czech Republic, a.s. | |
| 81.90.168.0/24 | Ceske Budejovice | |
| 81.90.170.0/24 | O2 Czech Republic, a.s. | |
| 81.90.173.0/24 | O2 Czech Republic, a.s. | |
| 83.69.32.0/19 | O2 Czech Republic, a.s. | |
| 83.208.0.0/16 | O2 Czech Republic, a.s. | |
| 83.208.0.0/18 | O2 Czech Republic, a.s. | |
| 83.208.64.0/18 | O2 Czech Republic, a.s. | |
| 83.208.128.0/19 | O2 Czech Republic, a.s. | |
| 85.70.0.0/15 | O2 Czech Republic, a.s. | |
| 85.70.0.0/16 | O2 Czech Republic, a.s. | |
| 85.70.0.0/17 | O2 Czech Republic, a.s. | |
| 85.70.128.0/17 | O2 Czech Republic, a.s. | |
| 85.71.0.0/16 | O2 Czech Republic, a.s. | |
| 85.160.0.0/15 | O2 Czech Republic, a.s. | |
| 85.193.0.0/18 | O2 Czech Republic, a.s. | |
| 88.83.160.0/19 | O2 Czech Republic, a.s. | |
| 88.83.175.0/24 | O2 Czech Republic, a.s. | |
| 88.100.0.0/14 | O2 Czech Republic, a.s. | |
| 88.100.0.0/15 | O2 Czech Republic, a.s. | |
| 88.102.0.0/15 | O2 Czech Republic, a.s. | |
| 88.102.0.0/16 | O2 Czech Republic, a.s. | |
| 90.176.32.0/19 | O2 Czech Republic, a.s. | |
| 90.176.64.0/18 | O2 Czech Republic, a.s. | |
| 90.176.128.0/17 | O2 Czech Republic, a.s. | |
| 90.177.0.0/16 | O2 Czech Republic, a.s. | |
| 90.178.0.0/15 | O2 Czech Republic, a.s. | |
| 90.180.0.0/14 | O2 Czech Republic, a.s. | |
| 90.182.108.0/24 | O2 Czech Republic, a.s. | |
| 109.80.0.0/15 | O2 Czech Republic, a.s. | |
| 109.81.208.0/24 | O2 Czech Republic, a.s. | |
| 109.81.209.0/24 | O2 Czech Republic, a.s. | |
| 109.81.210.0/24 | O2 Czech Republic, a.s. | |
| 109.81.211.0/24 | O2 Czech Republic, a.s. | |
| 109.81.212.0/24 | O2 Czech Republic, a.s. | |
| 109.81.213.0/24 | O2 Czech Republic, a.s. | |
| 109.81.214.0/24 | O2 Czech Republic, a.s. | |
| 109.81.215.0/24 | O2 Czech Republic, a.s. | |
| 151.236.224.0/20 | O2 Czech Republic, a.s. | |
| 151.236.224.0/22 | O2 Czech Republic, a.s. | |
| 151.236.228.0/22 | O2 Czech Republic, a.s. | |
| 151.236.232.0/24 | O2 Czech Republic, a.s. | |
| 151.236.233.0/24 | O2 Czech Republic, a.s. | |
| 160.218.0.0/16 | O2 Czech Republic, a.s. | |
| 217.117.208.0/20 | O2 Czech Republic, a.s. | |
| 217.194.160.0/20 | O2 Czech Republic, a.s. | |
| 37.58.0.0/21 | Telefonica Slovakia, s.r.o. | |
| 37.58.8.0/21 | Telefonica Slovakia, s.r.o. | |
| 37.188.128.0/17 | O2 Czech Republic, a.s. | |
| 37.188.128.0/21 | O2 Czech Republic, a.s. | |
| 37.188.136.0/21 | O2 Czech Republic, a.s. | |
| 37.188.144.0/20 | O2 Czech Republic, a.s. | |
| 37.188.144.0/21 | O2 Czech Republic, a.s. | |
| 37.188.152.0/21 | O2 Czech Republic, a.s. | |
| 37.188.160.0/20 | O2 Czech Republic, a.s. | |
| 37.188.160.0/21 | O2 Czech Republic, a.s. | |
| 37.188.168.0/21 | O2 Czech Republic, a.s. | |
| 37.188.176.0/20 | O2 Czech Republic, a.s. | |
| 37.188.176.0/21 | O2 Czech Republic, a.s. | |
| 37.188.184.0/21 | O2 Czech Republic, a.s. | |
| 37.188.192.0/23 | O2 Czech Republic, a.s. | |
| 37.188.194.0/23 | O2 Czech Republic, a.s. | |
| 37.188.224.0/21 | O2 Czech Republic, a.s. | |
| 37.188.232.0/21 | O2 Czech Republic, a.s. | |
| 37.188.240.0/20 | O2 Czech Republic, a.s. | |
| 37.188.240.0/21 | O2 Czech Republic, a.s. | |
| 37.188.248.0/21 | O2 Czech Republic, a.s. | |
| 91.191.64.0/18 | O2 Czech Republic, a.s. | |
| 91.193.132.0/22 | O2 Czech Republic, a.s. | |
| 91.213.10.0/24 | CGI IT Czech Republic s.r.o. | |
| 91.232.82.0/24 | O2 Czech Republic, a.s. | |
| 92.243.192.0/19 | O2 Czech Republic, a.s. | |
| 185.61.228.0/22 | O2 Czech Republic, a.s. | |
| 185.134.61.0/24 | O2 Czech Republic, a.s. | |
| 185.143.112.0/22 | O2 Czech Republic, a.s. | |
| 185.250.72.0/22 | O2 Czech Republic, a.s. | |
| 193.17.13.0/24 | O2 Czech Republic, a.s. | |
| 193.84.12.0/22 | Frenstat p.R. | |
| 193.84.12.0/23 | Frenstat p.R. | |
| 193.84.14.0/23 | Frenstat p.R. | |
| 194.50.248.0/24 | O2 Czech Republic, a.s. | |
| 194.50.249.0/24 | O2 Czech Republic, a.s. | |
| 194.165.47.0/24 | O2 Czech Republic, a.s. | |
| 194.228.0.0/16 | O2 Czech Republic, a.s. | |
| 194.228.0.0/17 | O2 Czech Republic, a.s. | |
| 194.228.11.0/24 | O2 Czech Republic, a.s. | |
| 194.228.13.0/24 | Prague | |
| 194.228.20.0/24 | O2 Czech Republic, a.s. | |
| 194.228.32.0/24 | O2 Czech Republic, a.s. | |
| 194.228.59.0/24 | O2 Czech Republic, a.s. | |
| 194.228.68.0/24 | O2 Czech Republic, a.s. | |
| 194.228.76.0/24 | O2 Czech Republic, a.s. | |
| 194.228.79.0/24 | O2 Czech Republic, a.s. | |
| 194.228.128.0/17 | O2 Czech Republic, a.s. | |
| 195.5.186.0/24 | O2 Czech Republic, a.s. | |
| 195.246.96.0/23 | O2 Czech Republic, a.s. | |
| 5.23.39.0/24 | O2 Czech Republic, a.s. | |
| 90.182.6.0/24 | O2 Czech Republic, a.s. | |
| 194.50.248.0/23 | O2 Czech Republic, a.s. | |
| 195.246.97.0/24 | O2 Czech Republic, a.s. | |