Registered organisation
Charles University
Address space registered to Charles University, 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 ARIN and LACNIC do not publish theirs, so holders in North and South America are largely missing here.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
34,492
IPv6 /64s
327,691
Registered blocks
26
Countries
1
What this tells you
- Holds 34,492 IPv4 addresses and 327,691 IPv6 /64 networks across 26 registered blocks.
- Announced entirely by AS2852 CESNET z.s.p.o..
- All of the space we can place resolves to Czechia.
Networks announcing this space
| Network | IPv4 share | IPv6 share | |
|---|---|---|---|
| AS2852 CESNET z.s.p.o. | 100% | 100% |
Countries this space resolves to
| Country | IPv4 share | IPv6 share | |
|---|---|---|---|
| Czechia | 100% | 100% |
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.