| 2 connect a.s. | 35236 | X | R | N | Y | N | U | R | R | R | R | Y | Y | Y | N | U | N | U | N | N | N | Y | R | N | R | N | R | R | R | Y | U | N | Y | Y | R | N | Y | N | R | R | Y | N | N | R | R | R | N | Y | Y | Y | R | U | R | N | Y | N | Y | R | N | R | R | R | U | N | U | N | R | N | R | N | U | R | N | R | N | R | Y | U | U | N | R | U |
| 4connect, s.r.o. | 51025 | R | X | Y | U | N | Y | R | R | R | R | R | Y | R | U | N | U | R | U | N | N | R | U | N | R | R | R | R | R | R | U | N | Y | N | R | U | R | N | R | R | R | U | Y | R | R | U | R | U | R | R | R | N | R | N | R | U | Y | Y | N | R | R | R | R | N | U | U | R | R | R | N | U | R | N | R | N | R | N | R | R | R | R | Y |
| ACTIVE 24, s.r.o. | 25234 | N | Y | X | N | N | N | U | N | N | N | U | U | Y | N | N | N | Y | N | Y | N | Y | N | Y | N | N | N | N | N | N | N | N | N | N | D | N | Y | N | N | N | Y | N | Y | N | N | N | Y | N | N | N | U | N | N | N | Y | N | Y | N | N | N | N | Y | Y | N | N | N | N | N | Y | N | N | N | N | N | N | N | U | Y | N | N | N | N |
| Akamai International B.V. | 20940 | Y | U | N | X | N | N | U | N | U | N | U | N | N | N | N | N | N | N | Y | N | R | N | N | R | N | N | U | N | N | N | N | N | N | N | N | U | N | N | U | N | N | N | N | U | U | N | N | U | N | R | N | U | N | N | N | Y | N | N | N | N | N | N | N | N | N | N | N | N | N | U | U | N | N | N | U | N | N | N | N | N | N |
| AS112 project | 112 | N | N | N | N | X | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N |
| Atrato IP Networks | 5580 | U | Y | N | N | N | X | U | N | U | N | U | Y | N | N | N | N | N | N | U | N | U | N | Y | R | U | U | U | N | Y | N | N | N | N | N | N | U | N | N | U | N | N | Y | N | U | N | N | N | U | Y | U | N | U | N | Y | N | Y | N | N | N | N | N | N | Y | N | N | N | N | Y | N | N | U | N | N | N | U | N | N | U | U | Y | N |
| AVAST Software a.s. | 197815 | R | R | U | U | N | U | X | U | N | R | R | U | R | U | U | U | U | N | N | U | R | U | N | R | R | U | Y | N | U | U | N | R | Y | U | U | R | N | U | R | R | N | U | N | R | U | U | U | Y | R | R | U | R | N | Y | N | U | Y | N | R | U | U | N | U | N | U | Y | U | R | N | R | R | N | N | N | U | N | N | Y | R | U | U |
| Casablanca INT, s.r.o. | 15685 | R | R | N | N | N | N | U | X | R | U | U | Y | Y | N | N | Y | Y | N | Y | N | D | N | Y | R | N | R | R | N | N | N | Y | R | N | Y | N | R | N | Y | D | D | N | Y | Y | N | U | Y | N | Y | N | D | N | N | N | Y | N | Y | N | N | R | N | R | Y | N | N | N | R | Y | Y | Y | U | R | Y | N | Y | U | U | Y | N | N | Y | N |
| CBS holding limited - Czech Branch, organizační složka | 42477 | R | R | N | U | N | U | N | R | X | R | R | Y | R | U | U | N | U | N | N | N | R | N | N | R | R | U | R | U | R | D | N | R | N | U | N | R | N | U | R | R | N | Y | U | R | R | U | U | R | R | R | N | R | N | R | N | Y | R | N | N | U | N | U | N | U | N | R | U | R | N | R | R | N | R | N | R | N | N | U | R | R | U |
| CentroNet, a.s. | 29321 | R | R | N | N | N | N | R | U | R | X | R | Y | N | N | N | N | N | N | N | N | R | N | N | N | N | R | Y | N | N | N | N | R | U | N | N | U | N | N | R | R | N | N | N | R | U | D | N | R | N | R | U | N | N | N | N | Y | N | N | R | N | R | N | N | N | N | R | N | R | N | R | R | N | R | N | R | Y | N | N | N | R | U |
| Centrum Holdings s.r.o. | 43614 | Y | R | U | U | N | U | R | U | R | R | X | R | R | U | N | N | N | N | N | N | Y | U | N | R | R | N | R | U | Y | U | N | Y | Y | U | U | Y | N | U | Y | Y | N | Y | U | Y | R | U | U | Y | R | R | U | Y | N | Y | N | Y | Y | N | R | U | N | U | U | U | U | Y | U | R | N | R | R | N | R | N | R | N | U | Y | Y | U | U |
| CESNET, z.s.p.o. | 2852 | Y | Y | U | N | N | Y | U | Y | Y | Y | R | X | Y | N | Y | U | Y | N | Y | N | Y | Y | Y | N | N | Y | Y | U | U | N | Y | N | N | Y | N | Y | N | Y | Y | Y | N | Y | Y | N | U | Y | U | Y | N | Y | N | Y | N | Y | N | Y | Y | N | Y | Y | Y | Y | Y | Y | N | N | N | Y | Y | U | Y | Y | N | Y | U | N | Y | U | N | Y | U |
| COOLHOUSING s.r.o. | 35592 | Y | R | Y | N | N | N | R | Y | R | N | R | Y | X | N | N | Y | Y | N | D | N | R | N | N | N | N | R | R | N | Y | N | N | R | N | Y | N | Y | N | Y | R | R | N | Y | N | R | U | Y | N | R | N | R | N | Y | N | Y | N | Y | N | N | R | N | R | Y | N | Y | N | N | N | Y | N | R | R | N | R | N | R | Y | N | N | N | R | N |
| CoproSys, a.s. | 39906 | N | U | N | N | N | N | U | N | U | N | U | N | N | X | N | N | N | N | N | N | U | N | N | N | N | N | U | N | N | N | N | N | N | N | N | U | N | N | U | N | N | N | N | U | U | N | N | U | N | R | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | U | N | N | N | U | N | N | N | N | N | N |
| CZ.NIC (ICANN L-ROOT) | 20144 | U | N | N | N | N | N | U | N | U | N | N | Y | N | N | X | N | N | N | Y | N | N | N | U | R | N | U | U | N | N | N | N | N | N | N | N | Y | N | N | U | Y | N | Y | N | U | N | N | N | U | N | R | N | N | N | R | N | Y | N | N | N | N | N | N | N | N | N | N | N | R | N | U | U | N | N | N | N | N | N | N | N | N | N |
| CZ.NIC (projekt F-ROOT) | 30134 | N | U | N | N | N | N | U | Y | N | N | N | U | Y | N | N | X | Y | N | Y | N | N | N | N | N | N | U | U | N | N | N | N | N | N | N | N | U | N | Y | N | R | N | N | N | U | N | Y | N | U | N | U | N | N | N | Y | N | Y | N | N | N | N | N | Y | N | N | N | N | N | R | N | U | U | N | N | N | N | N | N | N | N | N | N |
| CZ.NIC z.s.p.o. | 25192 | U | R | Y | N | N | N | U | Y | U | N | N | Y | Y | N | N | Y | X | N | Y | N | N | N | Y | U | N | U | U | N | N | N | Y | U | N | Y | N | U | N | Y | U | R | N | Y | N | U | U | Y | N | U | N | U | N | Y | N | Y | N | Y | N | N | U | N | U | Y | N | N | N | U | N | Y | Y | U | U | Y | N | N | U | U | Y | N | N | U | N |
| DataCamp, s.r.o. | 39392 | N | U | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | X | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | U | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N |
| Dial Telecom, a.s. | 29208 | N | N | Y | Y | N | U | N | Y | N | N | N | Y | D | N | Y | Y | Y | N | X | N | N | N | N | N | N | N | N | U | D | N | Y | U | Y | D | N | D | U | Y | N | Y | N | Y | R | N | N | Y | N | U | N | U | U | Y | N | Y | N | D | N | N | D | U | N | Y | D | U | N | N | D | Y | Y | N | N | Y | N | D | N | N | Y | U | N | N | N |
| DoclerWeb Kft. | 34655 | N | N | N | N | N | N | U | N | N | N | N | N | N | N | N | N | N | N | N | X | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | U | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | U | N | N | N | N | N | N | N | N | N | N | N |
| Dragon Internet, a.s. | 15614 | Y | R | Y | R | N | U | R | D | R | R | Y | Y | R | U | N | N | N | N | N | N | X | U | N | R | R | R | R | U | Y | R | U | R | Y | R | R | R | N | U | R | R | N | Y | R | R | R | U | U | R | R | R | U | R | N | R | N | Y | R | N | R | U | R | U | R | Y | U | R | R | R | U | U | R | N | R | N | R | N | N | U | R | R | Y |
| E4A s.r.l. | 34695 | R | U | N | N | N | N | U | N | N | N | U | Y | N | N | N | N | N | N | N | N | U | X | N | N | N | U | U | N | N | N | N | U | N | N | N | U | N | N | N | R | N | N | N | U | N | N | N | U | N | U | N | N | N | N | N | N | N | N | U | N | U | N | N | N | N | N | N | N | N | U | U | N | N | N | U | N | N | N | N | U | N |
| ČD-Telematika, a.s. | 25512 | N | N | Y | N | N | Y | N | Y | N | N | N | Y | N | N | U | N | Y | N | N | N | N | N | X | N | N | N | N | N | N | N | Y | N | N | U | N | Y | U | N | N | N | N | Y | N | N | N | U | N | N | N | U | N | Y | N | Y | N | D | N | N | N | N | N | U | N | U | N | N | N | N | N | N | N | N | N | N | N | Y | Y | N | N | U | U |
| České Radiokomunikace, a.s. | 25248 | R | R | N | R | N | R | R | R | R | N | R | N | N | N | R | N | U | N | N | N | R | N | N | X | R | R | R | R | R | R | N | R | N | U | N | R | N | U | R | R | N | N | R | R | U | U | R | R | R | R | N | R | N | R | N | Y | R | N | N | R | N | U | N | R | N | R | R | R | N | R | R | N | R | N | R | Y | N | R | N | R | R |
| Fortech, spol. s r.o. | 28851 | N | R | N | N | N | U | R | N | R | N | R | N | N | N | N | N | N | N | N | N | R | N | N | R | X | R | R | N | N | N | N | N | Y | N | N | R | N | N | R | N | N | N | N | R | R | N | N | R | N | R | N | N | N | N | N | Y | N | N | N | N | N | N | N | N | N | R | N | N | N | R | R | N | N | N | R | N | U | N | N | N | N |
| Freebone s.r.o. | 34692 | R | R | N | N | N | U | U | R | U | R | N | Y | R | N | U | U | U | N | N | N | R | U | N | R | R | X | U | U | R | N | N | R | N | R | N | R | N | U | U | R | N | N | U | U | U | U | U | U | N | R | N | R | N | R | N | Y | R | N | R | U | R | U | N | N | U | R | U | R | N | U | U | N | N | N | U | N | U | U | N | R | N |
| GiTy,a.s. | 29086 | R | R | N | U | N | U | Y | R | R | Y | R | Y | R | U | U | U | U | N | N | N | R | U | N | R | R | U | X | U | R | U | N | R | U | U | N | R | N | U | R | R | N | N | U | R | U | U | U | R | R | R | Y | R | N | R | N | Y | R | N | R | U | U | U | N | U | U | R | U | R | N | R | R | N | N | N | R | N | U | U | R | U | U |
| Google Ireland Limited | 15169 | R | R | N | N | N | N | N | N | U | N | U | U | N | N | N | N | N | N | U | N | U | N | N | R | N | U | U | X | N | N | N | U | N | N | N | U | N | N | U | R | N | N | N | U | U | N | N | U | N | R | N | N | N | N | N | Y | N | N | U | N | U | N | N | N | N | U | N | N | N | U | U | N | N | N | U | N | N | N | N | R | N |
| GRAPE SC, a.s. | 47232 | Y | R | N | N | N | Y | U | N | R | N | Y | U | Y | N | N | N | N | N | D | N | Y | N | N | R | N | R | R | N | X | N | N | Y | N | N | N | Y | N | N | R | N | N | N | N | R | U | N | N | R | N | R | N | N | N | N | N | Y | N | N | Y | N | N | N | N | N | N | R | N | R | N | R | R | N | R | N | R | N | N | N | N | R | Y |
| GREPA Networks, s.r.o. | 35361 | U | U | N | N | N | N | U | N | D | N | U | N | N | N | N | N | N | N | N | N | R | N | N | R | N | N | U | N | N | X | N | N | N | N | N | N | N | N | U | N | N | N | N | U | U | N | N | U | N | U | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | U | N | N | N | U | N | N | N | N | N | N |
| GTS Czech s.r.o. | 2819 | N | N | N | N | N | N | N | Y | N | N | N | Y | N | N | N | N | Y | N | Y | N | U | N | Y | N | N | N | N | N | N | N | X | N | N | Y | N | N | U | N | N | N | N | N | N | N | U | Y | N | N | U | U | N | N | N | N | N | Y | N | N | N | N | U | Y | N | N | N | N | N | N | Y | N | N | Y | N | Y | U | U | Y | N | N | N | U |
| ha-vel internet, s.r.o. | 15935 | Y | Y | N | N | N | N | R | R | R | R | Y | N | R | N | N | N | U | N | U | N | R | U | N | R | N | R | R | U | Y | N | N | X | N | R | N | R | N | U | R | R | N | N | R | R | U | Y | U | R | N | R | N | R | N | R | N | Y | N | N | R | U | R | U | N | N | N | R | U | R | N | R | R | N | R | N | R | Y | U | U | N | R | Y |
| Hurricane Electric | 6939 | Y | N | N | N | N | N | Y | N | N | U | Y | N | N | N | N | N | N | N | Y | N | Y | N | N | N | Y | N | U | N | N | N | N | N | X | N | N | Y | N | N | U | N | N | Y | N | U | U | N | N | Y | Y | U | N | R | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | Y | N | N | N | N | N | N | Y | Y | N | N | N | N | N |
| IGNUM, s.r.o. | 29134 | R | R | D | N | N | N | U | Y | U | N | U | Y | Y | N | N | N | Y | N | D | N | R | N | U | U | N | R | U | N | N | N | Y | R | N | X | N | R | N | Y | U | R | N | Y | N | U | U | Y | N | U | N | U | N | N | N | Y | N | Y | N | N | R | N | R | Y | N | N | N | R | N | R | Y | U | U | Y | R | N | U | U | Y | N | N | R | U |
| INTERNET CZ, a.s. | 24806 | N | U | N | N | N | N | U | N | N | N | U | N | N | N | N | N | N | N | N | N | R | N | N | N | N | N | N | N | N | N | N | N | N | N | X | N | N | N | U | N | N | N | N | N | U | N | N | U | N | N | N | N | N | N | N | U | N | N | N | N | N | N | N | N | N | N | N | N | N | U | N | N | N | N | U | N | N | N | N | N | N |
| Internethome, s.r.o. | 41824 | Y | R | Y | U | N | U | R | R | R | U | Y | Y | Y | U | Y | U | U | N | D | N | R | U | Y | R | R | R | R | U | Y | N | N | R | Y | R | N | X | U | R | R | R | N | Y | R | R | R | U | U | R | R | Y | U | R | N | Y | N | Y | R | N | R | U | R | Y | N | U | N | R | U | Y | R | R | R | Y | R | N | R | N | N | U | R | R | U |
| Interoute Czech, s.r.o. | 8928 | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | U | N | N | N | U | N | N | N | N | N | N | N | U | N | N | N | N | U | X | N | N | N | N | N | N | U | N | N | N | U | N | U | N | U | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | U | N | N | N | N | N | Y | N | N | N | N | N |
| IP Exchange GmbH | 15598 | R | R | N | N | N | N | U | Y | U | N | U | Y | Y | N | N | Y | Y | N | Y | N | U | N | N | U | N | U | U | N | N | N | N | U | N | Y | N | R | N | X | U | R | N | Y | N | U | U | Y | N | U | N | U | N | N | N | R | N | Y | N | N | U | N | U | N | N | N | N | U | N | R | Y | U | U | Y | N | N | U | N | N | N | N | U | N |
| JAW.cz s.r.o. | 43070 | R | R | N | U | N | U | R | D | R | R | Y | Y | R | U | U | N | U | N | N | N | R | N | N | R | R | U | R | U | R | U | N | R | U | U | U | R | N | U | X | R | N | N | U | R | R | U | U | R | R | R | U | R | N | R | N | Y | R | N | R | U | N | U | N | U | N | R | U | R | N | N | R | N | R | N | R | N | N | U | R | R | U |
| Kaora, s.r.o. | 42000 | Y | R | Y | N | N | N | R | D | R | R | Y | Y | R | N | Y | R | R | N | Y | N | R | R | N | R | N | R | R | R | N | N | N | R | N | R | N | R | N | R | R | X | N | Y | Y | R | R | Y | N | R | N | R | N | R | N | Y | N | Y | N | N | R | N | R | R | N | N | N | R | Y | R | N | R | R | N | R | N | R | Y | Y | Y | N | R | N |
| Kaunas University | 44358 | N | U | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | X | N | N | N | N | N | N | N | N | U | N | N | N | N | N | D | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N |
| KIT digital Czech, a.s. | 41711 | N | Y | Y | N | N | Y | U | Y | Y | N | Y | Y | Y | N | Y | N | Y | N | Y | N | Y | N | Y | N | N | N | N | N | N | N | N | N | Y | Y | N | Y | N | Y | N | Y | N | X | N | N | N | Y | N | N | N | U | Y | N | N | Y | N | Y | N | N | N | N | N | Y | N | N | N | N | N | N | N | N | N | D | N | Y | N | U | Y | N | N | N | U |
| LeaseWeb BV | 16265 | R | R | N | N | N | N | N | Y | U | N | U | Y | N | N | N | N | N | N | R | N | R | N | N | R | N | U | U | N | N | N | N | R | N | N | N | R | N | N | U | Y | N | N | X | U | U | N | N | U | N | R | N | N | N | R | N | Y | N | N | R | N | R | N | N | N | N | U | N | R | N | U | U | N | R | N | U | N | N | N | N | R | N |
| M.NET Studénka, s.r.o. | 197197 | R | R | N | U | N | U | R | N | R | R | Y | N | R | U | U | U | U | N | N | N | R | U | N | R | R | U | R | U | R | U | N | R | U | U | N | R | U | U | R | R | N | N | U | X | R | U | U | R | R | R | U | R | N | R | N | Y | R | U | R | U | U | U | N | U | U | R | U | R | N | R | R | N | R | N | R | N | N | U | R | U | Y |
| MAFRA, a.s. | 38952 | R | U | N | U | N | N | U | U | R | U | R | U | U | U | N | N | U | N | N | U | R | N | N | U | R | U | U | U | U | U | U | U | U | U | U | R | N | U | R | R | N | N | U | R | X | U | U | R | U | U | U | R | N | U | N | U | R | N | U | U | N | U | N | U | N | U | U | R | N | N | R | N | R | N | U | N | N | U | U | U | U |
| Master Internet, s.r.o. | 24971 | N | R | Y | N | N | N | U | Y | U | D | U | Y | Y | N | N | Y | Y | N | Y | N | U | N | U | U | N | U | U | N | N | N | Y | Y | N | Y | N | U | N | Y | U | Y | N | Y | N | U | U | X | N | U | N | U | N | N | N | Y | N | Y | N | N | Y | N | Y | Y | N | N | N | U | N | Y | N | N | N | Y | N | D | U | N | Y | N | N | R | N |
| MAXPROGRES, s.r.o | 34315 | Y | U | N | N | N | N | U | N | U | N | U | U | N | N | N | N | N | N | N | N | U | N | N | R | N | U | U | N | N | N | N | U | N | N | N | U | N | N | U | N | N | N | N | U | U | N | X | U | N | U | N | N | N | N | N | U | U | N | N | N | N | N | N | N | N | U | N | N | N | U | U | N | N | N | U | N | U | N | N | N | N |
| MERIT GROUP a.s. | 39904 | Y | R | N | U | N | U | Y | Y | R | R | Y | Y | R | U | U | U | U | N | U | N | R | U | N | R | R | U | R | U | R | U | N | R | Y | U | U | R | U | U | R | R | N | N | U | R | R | U | U | X | R | Y | U | R | N | R | N | Y | R | U | R | U | R | U | N | U | U | R | U | R | N | R | R | N | R | N | R | N | U | U | R | U | U |
| METRONET, s.r.o. | 43708 | Y | R | N | N | N | Y | R | N | R | N | R | N | N | N | N | N | N | N | N | N | R | N | N | R | N | N | R | N | N | N | U | N | Y | N | N | R | N | N | R | N | N | N | N | R | U | N | N | R | X | R | U | N | N | N | N | Y | N | N | N | N | N | N | N | N | N | N | N | R | N | U | R | N | N | N | R | N | N | N | N | N | N |
| MGI.CZ, s.r.o. | 20723 | R | R | U | R | N | U | R | D | R | R | R | Y | R | R | R | U | U | U | U | N | R | U | U | R | R | R | R | R | R | U | U | R | U | U | N | Y | U | U | R | R | U | U | R | R | U | U | U | Y | R | X | N | R | N | R | U | Y | Y | U | R | U | R | U | N | R | U | R | R | R | N | R | R | U | R | U | R | Y | U | R | R | R | U |
| Microsoft Corporation | 8075 | U | N | N | N | N | N | U | N | N | U | U | N | N | N | N | N | N | N | U | N | U | N | N | N | N | N | Y | N | N | N | N | N | N | N | N | U | N | N | U | N | N | Y | N | U | U | N | N | U | U | N | X | N | N | U | N | N | N | N | N | N | N | N | N | N | N | U | N | N | N | N | N | N | N | N | U | N | N | N | N | N | N |
| MIRAMO, spol. s r. o. | 34080 | R | R | N | U | N | U | R | N | R | N | Y | Y | Y | N | N | N | Y | N | Y | N | R | N | Y | R | N | R | R | N | N | N | N | R | R | N | N | R | U | N | R | R | N | N | N | R | R | N | N | R | N | R | N | X | N | N | N | Y | N | N | R | N | R | Y | N | N | N | R | N | R | N | R | R | N | R | N | R | N | N | N | N | R | N |
| Neo telecoms | 8218 | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | X | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N |
| NFX, z.s.p.o. | 8251 | Y | R | Y | N | N | Y | Y | Y | R | N | Y | Y | Y | N | R | Y | Y | N | Y | N | R | N | Y | R | N | R | R | N | N | N | N | R | N | Y | N | Y | N | R | R | Y | N | Y | R | R | U | Y | N | R | N | R | U | N | N | X | N | Y | N | N | R | N | R | Y | N | N | N | R | N | Y | N | R | R | Y | R | N | R | N | N | N | N | R | U |
| NIC.AT | 49488 | N | U | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | U | N | N | N | N | X | U | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N |
| NIX.CZ, z.s.p.o. | 6881 | Y | Y | Y | Y | N | Y | U | Y | Y | Y | Y | Y | Y | N | Y | Y | Y | N | D | N | Y | N | D | Y | Y | Y | Y | Y | Y | N | Y | Y | N | Y | U | Y | N | Y | Y | Y | D | Y | Y | Y | U | Y | U | Y | Y | Y | N | Y | N | Y | U | X | Y | N | Y | U | Y | Y | N | Y | U | Y | Y | Y | Y | Y | Y | Y | R | Y | U | U | Y | Y | Y | Y | U |
| OVANET, a.s. | 39817 | R | Y | N | N | N | N | Y | N | R | N | Y | Y | N | N | N | N | N | N | N | N | R | N | N | R | N | R | R | N | N | N | N | N | N | N | N | R | N | N | R | N | N | N | N | R | R | N | U | R | N | Y | N | N | N | N | N | Y | X | N | N | N | N | N | N | N | N | N | U | R | N | R | R | N | N | N | R | N | N | N | N | N | U |
| OVH, SAS | 16276 | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | U | N | N | N | U | N | U | N | N | N | N | N | N | N | X | N | N | N | N | N | N | N | N | N | N | N | U | N | N | N | N | N | N | N | N | N | N | N |
| OXID Networks, s.r.o. | 35214 | R | R | N | N | N | N | R | R | N | R | R | Y | R | N | N | N | U | N | D | N | R | U | N | N | N | R | R | U | Y | N | N | R | N | R | N | R | N | U | R | R | N | N | R | R | U | Y | N | R | N | R | N | R | N | R | N | Y | N | N | X | U | R | U | N | N | N | N | U | R | N | U | R | N | R | N | R | N | N | U | N | R | N |
| Pantel International CZ, s.r.o. | 12301 | R | R | N | N | N | N | U | N | U | N | U | Y | N | N | N | N | N | N | U | N | U | N | N | R | N | U | U | N | N | N | N | U | N | N | N | U | N | N | U | N | N | N | N | U | U | N | N | U | N | U | N | N | N | N | N | U | N | N | U | X | U | N | N | N | N | U | N | N | N | U | U | N | N | N | U | N | N | N | N | R | N |
| PODA, a.s. | 30764 | R | R | Y | N | N | N | U | R | N | R | N | Y | R | N | N | N | U | N | N | N | R | U | N | N | N | R | U | U | N | N | U | R | N | R | N | R | N | U | N | R | N | N | R | U | N | Y | N | R | N | R | N | R | N | R | N | Y | N | N | R | U | X | U | N | N | N | N | N | R | N | U | R | N | R | N | N | N | U | U | N | R | N |
| RETN Limited | 9002 | U | R | Y | N | N | N | N | Y | U | N | U | Y | Y | N | N | Y | Y | N | Y | N | U | N | U | U | N | U | U | N | N | N | Y | U | N | Y | N | Y | N | N | U | R | N | Y | N | U | U | Y | N | U | N | U | N | Y | N | Y | N | Y | N | N | U | N | U | X | N | N | N | U | N | Y | N | U | U | N | N | N | U | U | Y | N | N | U | N |
| RFE/RL, Inc., organizační složka | 8518 | N | N | N | N | N | Y | U | N | N | N | U | Y | N | N | N | N | N | N | D | N | R | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | X | N | N | N | N | N | N | U | N | N | N | N | N | N | N | N | N | N | N |
| RIO Media, a.s. | 16246 | U | U | N | N | N | N | N | N | U | N | U | Y | Y | N | N | N | N | N | U | N | Y | N | U | R | N | N | U | N | N | N | N | N | N | N | N | U | N | N | U | N | N | N | N | U | U | N | N | U | N | R | N | N | N | N | N | Y | N | N | N | N | N | N | N | X | N | N | N | N | N | Y | U | N | N | N | U | Y | U | N | N | N | N |
| RIPNDNS (MSK-IX, JSC) | 44522 | N | U | N | N | N | N | U | N | N | N | U | N | N | N | N | N | N | N | N | N | U | N | N | N | N | U | U | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | U | N | N | N | U | N | U | N | N | N | N | N | U | N | N | N | N | N | N | N | N | X | N | N | N | N | U | U | N | N | N | U | N | N | N | N | N | N |
| SELFservis, s.r.o. | 12570 | R | R | N | N | N | N | Y | R | R | R | Y | N | N | N | N | N | U | N | N | N | R | N | N | R | R | R | R | U | R | N | N | R | N | R | N | R | N | U | R | R | N | N | U | R | U | U | U | R | N | R | U | R | N | R | N | Y | N | N | N | U | N | U | N | N | N | X | U | R | N | Y | R | N | R | N | U | Y | U | U | N | R | N |
| Seznam.cz, a.s. | 43037 | N | R | N | N | N | N | U | Y | U | N | U | N | N | N | N | N | N | N | D | N | R | N | N | R | N | U | U | N | N | N | N | U | N | N | N | U | N | N | U | Y | N | N | N | U | U | N | N | U | N | R | N | N | N | N | N | Y | U | N | U | N | N | N | N | N | N | U | X | N | N | U | U | N | R | N | U | U | U | N | N | U | N |
| SkyNet, a.s. | 5407 | R | R | Y | N | N | Y | R | Y | R | R | R | Y | Y | N | R | R | Y | N | Y | N | R | N | N | R | N | R | R | N | R | N | N | R | Y | R | N | Y | N | R | R | R | N | N | R | R | R | Y | N | R | R | R | N | R | N | Y | N | Y | R | N | R | N | R | Y | N | N | N | R | N | X | N | R | R | Y | R | N | R | N | R | N | R | R | N |
| SMART Comp. a.s. | 31246 | N | N | N | N | N | N | N | Y | N | N | N | Y | N | N | N | N | Y | N | Y | N | U | N | N | N | N | N | N | N | N | N | Y | N | N | Y | N | R | N | Y | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | Y | N | N | N | N | N | N | N | N | N | N | N | N | X | N | N | Y | N | D | N | N | N | N | N | N | N |
| STAR 21 Networks, a.s. | 50495 | U | U | N | U | N | N | R | U | R | R | R | U | R | N | U | U | U | N | N | U | U | U | N | R | R | U | R | U | R | N | N | R | N | U | U | R | U | U | N | R | N | N | U | R | N | N | U | R | U | R | N | R | N | R | N | Y | R | U | U | U | U | U | U | Y | U | Y | U | R | N | X | R | N | R | N | U | N | N | U | U | U | U |
| SUPRO, spol. s r.o. | 47868 | R | R | N | U | N | U | R | R | R | R | R | Y | R | U | U | U | U | N | N | N | R | U | N | R | R | U | R | U | R | U | N | R | N | U | N | R | N | U | R | R | N | N | U | R | R | N | U | R | R | R | N | R | N | R | N | Y | R | N | R | U | R | U | N | U | U | R | U | R | N | R | X | N | R | N | R | N | N | U | R | U | U |
| T-Systems Czech Republic, a.s. | 12767 | N | N | N | N | N | N | N | Y | N | N | N | Y | N | N | N | N | Y | N | Y | N | N | N | N | N | N | N | N | N | N | N | Y | N | N | Y | N | Y | N | Y | N | N | N | D | N | N | N | Y | N | N | N | U | N | N | N | Y | N | Y | N | N | N | N | N | N | N | N | N | N | N | Y | Y | N | N | X | N | Y | N | U | Y | U | N | N | N |
| Telefónica Czech Republic, a.s. | 5610 | R | R | N | N | N | N | N | N | R | R | R | N | R | N | N | N | N | N | N | N | R | N | N | R | N | N | N | N | R | N | N | R | N | R | N | R | N | N | R | R | N | N | R | R | R | N | N | R | N | R | N | R | N | R | N | R | N | N | R | N | R | N | N | N | N | R | R | R | N | R | R | N | X | N | N | N | N | N | N | R | N |
| Tinet SpA | 3257 | N | N | N | N | N | N | N | Y | N | N | N | Y | N | N | N | N | N | N | D | N | N | N | N | N | N | N | N | N | N | N | Y | N | N | N | N | N | N | N | N | N | N | Y | N | N | N | D | N | N | N | U | N | N | N | N | N | Y | N | N | N | N | N | N | N | N | N | N | N | N | D | N | N | Y | N | X | N | D | D | N | N | N | N |
| TRIOPTIMUM, s.r.o. | 33883 | R | R | N | U | N | U | U | U | R | R | R | U | R | U | N | N | U | N | N | N | R | U | N | R | R | U | R | U | R | U | U | R | Y | U | U | R | N | U | R | R | N | N | U | R | U | U | U | R | R | R | U | R | N | R | N | U | R | N | R | U | N | U | N | U | U | U | U | R | N | U | R | N | N | N | X | N | N | U | R | U | U |
| UPC Ceska republika, a.s. | 6830 | Y | N | U | N | N | N | N | U | N | Y | N | N | Y | N | N | N | U | N | N | N | N | N | Y | Y | N | N | N | N | N | N | U | Y | Y | U | N | N | Y | N | N | Y | N | U | N | N | N | N | N | N | N | Y | N | N | N | N | N | U | N | N | N | N | N | U | N | Y | N | Y | U | N | N | N | N | U | N | D | N | X | U | U | N | N | N |
| UPC Česká republika, a.s. (Sloane Park Property Trust, a.s.) | 29113 | U | R | Y | N | N | N | N | Y | N | N | U | Y | N | N | N | N | Y | N | Y | N | N | N | Y | N | U | U | U | N | N | N | Y | U | N | Y | N | N | N | N | N | Y | N | Y | N | N | N | Y | U | U | N | U | N | N | N | N | N | Y | N | N | N | N | U | Y | N | U | N | U | U | R | N | N | N | Y | N | D | N | U | X | N | N | U | N |
| Vodafone Czech Republic, a.s. | 16019 | U | R | N | N | N | U | Y | N | U | N | Y | U | N | N | N | N | N | N | U | N | U | N | N | R | N | U | U | N | N | N | N | U | N | N | N | U | N | N | U | Y | N | N | N | U | U | N | N | U | N | R | N | N | N | N | N | Y | N | N | U | N | U | N | N | N | N | U | N | N | N | U | U | U | N | N | U | U | N | X | N | U | N |
| VSHosting s.r.o. | 43541 | N | R | N | N | N | U | R | N | R | N | Y | N | N | N | N | N | N | N | N | N | R | N | N | N | N | N | R | N | N | N | N | N | N | N | N | R | N | N | R | N | N | N | N | R | U | N | N | R | N | R | N | N | N | N | N | Y | N | N | N | N | N | N | N | N | N | N | N | R | N | U | R | N | N | N | R | N | N | N | X | N | N |
| Web4U s.r.o. | 39790 | R | R | N | N | N | Y | U | Y | R | R | U | Y | R | N | N | N | U | N | N | N | R | U | U | R | N | R | U | R | R | N | N | R | N | R | N | R | N | U | R | R | N | N | R | U | U | R | N | U | N | R | N | R | N | R | N | Y | N | N | R | R | R | U | N | N | N | R | U | R | N | U | U | N | R | N | U | N | U | U | N | X | N |
| WIA, spol. s .r.o. | 21430 | U | Y | N | N | N | N | U | N | U | U | U | U | N | N | N | N | N | N | N | N | Y | N | U | R | N | N | U | N | Y | N | U | Y | N | U | N | U | N | N | U | N | N | U | N | Y | U | N | N | U | N | U | N | N | N | U | N | U | U | N | N | N | N | N | N | N | N | N | N | N | N | U | U | N | N | N | U | N | N | N | N | N | X |
- Peering at NIX.CZ direct session
- Peering at NIX.CZ via route-server
- Direct peering outside NIX.CZ
- No peering
- Unconfirmed peering