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 ARIN and LACNIC do not publish theirs, so space held in North and South America is largely unattributed here.
What this tells you
- Holds 264,448 IPv4 addresses and 35,214,436,990,976 IPv6 /64 networks across 19 registered blocks.
- Announced by 33 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
Space announced by a network covers 99% of this holder's IPv4 space and 100% of its IPv6 space. The table below divides that space.
| Network | IPv4 share | IPv6 share | |
|---|---|---|---|
| AS4538 China Education and Research Network Center | 99% | 0.4% | |
| AS23910 China Next Generation Internet CERNET2 | - | 49% | |
| AS142691 APNIC ASN block | - | 25% | |
| AS38255 China Education and Research Network (CERNET) | - | 25% | |
| Everything else (29 more) | <0.1% | 0.8% |
Countries this space resolves to
Space we can place in a country covers 100% of this holder's IPv4 space and 100% of its IPv6 space. The table below divides that space.
| 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.
Every figure on this page is also JSON: /api/v2/directory/org/china-education-and-research-network-cernet. Breakdowns paginate from there, so a table showing the largest rows here returns all of them. Read the API.