Below is the top of countries that host Czech (.cz) domains ordered downwards by the number of domains hosted by a country.
| Nr | Country | Hosted domains | IPs | Percent |
| 1 | Czech Republic | 83735 | 10366 | 94.4 % |
| 2 | United States | 1920 | 810 | 2.2 % |
| 3 | Germany | 602 | 473 | 0.7 % |
| 4 | Slovakia | 517 | 258 | 0.6 % |
| 5 | Italy | 355 | 51 | 0.4 % |
| 6 | United Kingdom | 234 | 135 | 0.3 % |
| 7 | Canada | 179 | 24 | 0.2 % |
| 8 | Poland | 159 | 109 | 0.2 % |
| 9 | Europe | 130 | 66 | 0.1 % |
| 10 | Austria | 120 | 92 | 0.1 % |
| 11 | France | 115 | 90 | 0.1 % |
| 12 | Netherlands | 113 | 98 | 0.1 % |
| 13 | Australia | 93 | 7 | 0.1 % |
| 14 | Sweden | 68 | 52 | 0.1 % |
| 15 | Hungary | 51 | 37 | 0.1 % |
| 16 | Denmark | 47 | 36 | 0.1 % |
| 17 | Seychelles | 38 | 7 | 0.0 % |
| 18 | Switzerland | 31 | 29 | 0.0 % |
| 19 | Belgium | 29 | 24 | 0.0 % |
| 20 | Russian Federation | 23 | 20 | 0.0 % |
| 21 | Finland | 16 | 16 | 0.0 % |
| 22 | Luxembourg | 14 | 6 | 0.0 % |
| 23 | Slovenia | 13 | 9 | 0.0 % |
| 24 | Spain | 10 | 10 | 0.0 % |
| 25 | Norway | 9 | 9 | 0.0 % |
| 26 | ? | 8 | 5 | 0.0 % |
| 27 | Israel | 4 | 4 | 0.0 % |
| 28 | Estonia | 4 | 4 | 0.0 % |
| 29 | Ireland | 4 | 4 | 0.0 % |
| 30 | Iceland | 4 | 3 | 0.0 % |
| 31 | Cyprus | 4 | 2 | 0.0 % |
| 32 | Ukraine | 4 | 3 | 0.0 % |
| 33 | Lithuania | 3 | 3 | 0.0 % |
| 34 | Hong Kong | 3 | 3 | 0.0 % |
| 35 | Singapore | 3 | 2 | 0.0 % |
| 36 | Croatia | 3 | 2 | 0.0 % |
| 37 | Taiwan | 2 | 1 | 0.0 % |
| 38 | Turkey | 2 | 2 | 0.0 % |
| 39 | Romania | 2 | 2 | 0.0 % |
| 40 | Mexico | 1 | 1 | 0.0 % |
| 41 | Bulgaria | 1 | 1 | 0.0 % |
| 42 | Indonesia | 1 | 1 | 0.0 % |
| 43 | San Marino | 1 | 1 | 0.0 % |
| 44 | Saudi Arabia | 1 | 1 | 0.0 % |
| 45 | Latvia | 1 | 1 | 0.0 % |
| 46 | China | 1 | 1 | 0.0 % |
| 47 | Virgin Islands | 1 | 1 | 0.0 % |
| 48 | Liechtenstein | 1 | 1 | 0.0 % |
| 49 | Japan | 1 | 1 | 0.0 % |
| 50 | Serbia | 1 | 1 | 0.0 % |
