Sorted by domains count. Used most recent known number.
| Registrar | Domains |
|---|---|
| REG-WEDOS | 329971 |
| REG-INTERNET-CZ | 326062 |
| REG-ACTIVE24 | 190993 |
| REG-WEBGLOBE | 150885 |
| REG-GRANSY | 133441 |
| REG-IGNUM | 98156 |
| REG-GENREG | 70017 |
| REG-ZONER | 64307 |
| REG-MEDIA4WEB | 51501 |
| REG-WEB4U | 43534 |
| REG-THINLINE | 37345 |
| REG-ONESOLUTION | 23749 |
| REG-1API | 21420 |
| REG-WEBSUPPORT | 21136 |
| REG-STABLE | 20131 |
| REG-TELE3 | 18898 |
| REG-SEONET | 15921 |
| REG-KEYSYSTEMS | 15155 |
| REG-MITON | 11979 |
| REG-E-INTERNET | 6363 |
| REG-SEZNAM | 6344 |
| REG-ONE | 6098 |
| REG-IPMIRROR | 6043 |
| REG-OPENPROVIDER | 6041 |
| REG-COL | 5763 |
| REG-WINSOFT | 5341 |
| REG-ASCIO | 5332 |
| REG-OVH | 4727 |
| REG-INTERNETX | 3962 |
| REG-NETIM | 3959 |
| REG-EXPLORER | 3949 |
| REG-GANDI | 3416 |
| REG-MARKMONITOR | 3336 |
| REG-BANAN | 3226 |
| REG-MASANTA | 2985 |
| REG-KRAXNET | 2932 |
| REG-CENTRUM | 2586 |
| REG-UN-DOMAINS | 2555 |
| REG-SONEXO | 2476 |
| REG-TERMS | 2436 |
| REG-PIPNI | 2223 |
| REG-AERO-TRIP | 2158 |
| REG-AXFONE | 2132 |
| REG-IPEX | 1844 |
| REG-ASPONE | 1758 |
| REG-NOMIQ | 1402 |
| REG-THOSTING | 1367 |
| REG-ABOVE | 1334 |
| REG-NAMESHIELD | 1228 |
| REG-CES-SERVER | 1031 |
| REG-NEXUM | 1010 |
| REG-CT | 961 |
| REG-DIAL-TEL | 740 |
| REG-SAFENAMES | 730 |
| REG-QUANTCOM | 651 |
| REG-INSTRA | 634 |
| REG-DOMAINPROFI | 618 |
| REG-HAVEL | 495 |
| REG-CORE | 493 |
| REG-MIRAMO | 445 |
| REG-DYNADOT | 285 |
| REG-CZNIC | 284 |
| REG-DOMENESHOP | 240 |
| REG-VARIOMEDIA | 151 |
| REG-MARCARIA | 133 |
| REG-AKREDIT | 125 |
| REG-NEWMEDIA | 74 |
| REG-LEXSYNERGY | 58 |
| REG-DOMRAIDER | 33 |
| REG-WEBSOLUTIONS | 32 |
| REG-BARBERO | 13 |
| REG-FOCUSIP | 2 |
| REG-1X | 1 |
| REG-MARKETER | 1 |