Registered organisation
O2 Czech Republic, a.s.
Address space registered to O2 Czech Republic, a.s., and where it is announced from.
Registered holders come from the bulk whois that RIPE, APNIC and AFRINIC publish. ARIN and LACNIC do not publish theirs, so holders in North and South America are largely missing here.
IPv4 addresses
2,019,328
IPv6 /64s
399,431,958,549
Registered blocks
115
Countries
2
What this tells you
- Holds 2,019,328 IPv4 addresses and 399,431,958,549 IPv6 /64 networks across 115 registered blocks.
- Announced by 6 networks, the largest being AS42908 O2 Czech Republic, a.s. at 99% of the IPv4 space.
- Its space resolves to 2 countries, mostly Czechia (100% of the IPv4 space).
Networks announcing this space
| Network | IPv4 share | IPv6 share | |
|---|---|---|---|
| AS42908 O2 Czech Republic, a.s. | 99% | 100% | |
| AS56566 SATT a.s. | 0.1% | - | |
| AS198282 CAH Building s.r.o. | 0.1% | - | |
| Everything else, including space not announced (3 more) | 0.2% | - |
Countries this space resolves to
| Country | IPv4 share | IPv6 share | |
|---|---|---|---|
| Czechia | 100% | 100% | |
| Everything else, including space we cannot place (1 more) | <0.1% | - |
Holding a block is a registry fact, not a physical one. The organisation named here is who the block is assigned to, which is often a customer of the network operator announcing it.