Registered organisation
China Education and Research Network (CERNET)
Address space registered to China Education and Research Network (CERNET), 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 ARIN and LACNIC do not publish theirs, so holders in North and South America are largely missing here.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
264,448
IPv6 /64s
35,214,436,990,985
Registered blocks
19
Countries
1
What this tells you
- Holds 264,448 IPv4 addresses and 35,214,436,990,985 IPv6 /64 networks across 19 registered blocks.
- Announced by 24 networks, the largest being AS4538 China Education and Research Network Center at 99% of the IPv4 space.
- All of the space we can place resolves to China.
Networks announcing this space
| Network | IPv4 share | IPv6 share | |
|---|---|---|---|
| AS4538 China Education and Research Network Center | 99% | 51% | |
| AS24357 CERNET2 IX at South China University of Technology | 0.2% | <0.1% | |
| AS23910 China Next Generation Internet CERNET2 | - | 49% | |
| Everything else, including space not announced (21 more) | 1.0% | 0.5% |
Countries this space resolves to
| Country | IPv4 share | IPv6 share | |
|---|---|---|---|
| China | 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.