AS23910China Next Generation Internet CERNET2
ChinaRegistryAPNICAs of 26th September 2026, AS23910 (China Next Generation Internet CERNET2), a network registered in China with APNIC, originates 6 IPv6 prefixes. It is seen behind 3 upstream networks, most often AS4538 (China Education and Research Network…) and AS4134 (China Telecom Backbone), and in front of 43 downstream networks. 33% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 67% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.
At a glance
IPv4 prefixes
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS23910 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS23910 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.
Neighbouring networks
93
adjacent networks
- Upstreams
- 33%
- Peers
- 4751%
- Downstreams
- 4346%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS4538China Education and Research Network Center | CN | Peer | 10,416 | 9 |
| AS4134China Telecom Backbone | CN | Peer | 6,220 | 7 |
| AS23911China Next Generation Internet Beijing IX | CN | Peer | 5,440 | 64 |
Prefixes
The largest blocks AS23910 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 240c:c000::/20 | 17.6T × /64 | 64/64 |
| 2001:250::/32 | 4.3B × /64 | 64/64 |
| 2001:251::/32 | 4.3B × /64 | 64/64 |
| 2001:da8::/32 | 4.3B × /64 | 64/64 |
| 240c:c0a9:1000::/40 | 16.8M × /64 | 7/64 |
| 2001:da8:20d::/48 | 65.5k × /64 | 9/64 |
Routing health
How AS23910's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.
RPKI origin validation
- Valid33.3%2
- Invalid0.0%0
- No ROA66.7%4
Propagation
- Globally propagated90% of full-feed peers or more66.7%4
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%33.3%2
Prefix sizes
IPv6 — 6 prefixes
- /2017.6T × /6416.7%1
- /324.3B × /6450.0%3
- /4016.8M × /6416.7%1
- /4865.5k × /6416.7%1
Recent changes
Announcements that started or stopped since 27th Aug 2026.
No announcement by AS23910 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.