| CZ-CZNET-20061017 | ||||
| 90.176.32.0 — 90.183.255.255 | Czech Republic | 90.176.32.0/19, 90.176.64.0/18, 90.176.128.0/17, 90.177.0.0/16, 90.178.0.0/15, 90.180.0.0/14 | 516096 | |
| CZ-CZNET-20051004 | ||||
| 88.100.0.0 — 88.103.255.255 | Czech Republic | 88.100.0.0/14 | 262144 | |
| CZ-CZNET-20041025 | ||||
| 85.160.0.0 — 85.161.255.255 | Czech Republic | 85.160.0.0/15 | 131072 | |
| CZ-CZNET-20090710 | ||||
| 109.80.0.0 — 109.81.255.255 | Czech Republic | 109.80.0.0/15 | 131072 | |
| CZ-CZNET-20041102 | ||||
| 85.70.0.0 — 85.71.255.255 | Czech Republic | 85.70.0.0/15 | 131072 | |
| CZ-CZNET-20040405 | ||||
| 160.218.0.0 — 160.218.255.255 | Czech Republic | 160.218.0.0/16 | 65536 | |
| CZ-CZNET-20040302 | ||||
| 83.208.0.0 — 83.208.255.255 | Czech Republic | 83.208.0.0/16 | 65536 | |
| CZ-CZNET-20020613 | ||||
| 80.188.0.0 — 80.188.255.255 | Czech Republic | 80.188.0.0/16 | 65536 | |
| CZ-CZNET-971003 | ||||
| 194.228.0.0 — 194.228.255.255 | Czech Republic | 194.228.0.0/16 | 65536 | |
| CZ-CZNET-20120320 | ||||
| 37.188.128.0 — 37.188.255.255 | Czech Republic | 37.188.128.0/17 | 32768 | |
| CZ-CZNET-20041216 | ||||
| 85.193.0.0 — 85.193.63.255 | Czech Republic | 85.193.0.0/18 | 16384 | |
| EUROTEL-8 | ||||
| 37.188.128.0 — 37.188.191.255 | O2 Czech Republic, a.s. | Czech Republic | 37.188.128.0/18 | 16384 |
| EUROTEL-9 | ||||
| 37.188.192.0 — 37.188.255.255 | O2 Czech Republic, a.s. | Czech Republic | 37.188.192.0/18 | 16384 |
| CZ-CZNET-20060109 | ||||
| 88.83.160.0 — 88.83.191.255 | Czech Republic | 88.83.160.0/19 | 8192 | |
| CZ-CZNET-20040525 | ||||
| 83.69.32.0 — 83.69.63.255 | Czech Republic | 83.69.32.0/19 | 8192 | |
| CZ-CZNET-20080130 | ||||
| 92.243.192.0 — 92.243.223.255 | Czech Republic | 92.243.192.0/19 | 8192 | |
| EUROTEL-9a | ||||
| 37.188.192.0 — 37.188.223.255 | O2 Czech Republic, a.s. | Czech Republic | 37.188.192.0/19 | 8192 |
| CZ-CZNET-20040202 | ||||
| 217.117.208.0 — 217.117.223.255 | Czech Republic | 217.117.208.0/20 | 4096 | |
| CZ-CZNET-20020704 | ||||
| 81.90.160.0 — 81.90.175.255 | Czech Republic | 81.90.160.0/20 | 4096 | |
| CZ-CZNET-20090402 | ||||
| 217.194.160.0 — 217.194.175.255 | Czech Republic | 217.194.160.0/20 | 4096 | |
| CZ-CZNET-20140624 | ||||
| 185.61.228.0 — 185.61.231.255 | Czech Republic | 185.61.228.0/22 | 1024 | |
| CGNAT | ||||
| 194.228.11.0 — 194.228.11.255 | O2 Czech Republic, a.s. | Czech Republic | 194.228.11.0/24 | 256 |
| 194.228.32.0 — 194.228.32.255 | O2 Czech Republic, a.s. | Czech Republic | 194.228.32.0/24 | 256 |
| 194.228.68.0 — 194.228.68.255 | O2 Czech Republic, a.s. | Czech Republic | 194.228.68.0/24 | 256 |
| 194.228.20.0 — 194.228.20.255 | O2 Czech Republic, a.s. | Czech Republic | 194.228.20.0/24 | 256 |
| 194.228.13.0 — 194.228.13.255 | O2 Czech Republic, a.s. Prague | Czech Republic | 194.228.13.0/24 | 256 |
| NEXTEL-XDSL | ||||
| 109.80.0.0 — 109.80.0.255 | O2 Czech Republic, a.s. | Czech Republic | 109.80.0.0/24 | 256 |
| IOL-ADSL | ||||
| 194.228.59.0 — 194.228.59.255 | O2 Czech Republic, a.s. | Czech Republic | 194.228.59.0/24 | 256 |
| 194.228.79.0 — 194.228.79.255 | O2 Czech Republic, a.s. | Czech Republic | 194.228.79.0/24 | 256 |
| 194.228.76.0 — 194.228.76.255 | O2 Czech Republic, a.s. | Czech Republic | 194.228.76.0/24 | 256 |
| CZ-CZNET-20090619 | ||||
| 2a00:1028:: — 2a00:102f:ffff:ffff:ffff:ffff:ffff:ffff | Czech Republic | 2a00:1028::/29 | 299 | |
| O2-CR | ||||
| 195.250.141.208 — 195.250.141.209 | O2 Czech Republic, a.s. | Czech Republic | 195.250.141.208/31 | 2 |
| 195.250.141.210 — 195.250.141.211 | O2 Czech Republic, a.s. | Czech Republic | 195.250.141.210/31 | 2 |
| CZ-CZNET-20041118 | ||||
| 2001:41d8:: — 2001:41d8:ffff:ffff:ffff:ffff:ffff:ffff | Czech Republic | 2001:41d8::/32 | 296 | |
