AS24349CERNET2 IX at Peking University
ChinaRegistryAPNICAs of 26th September 2026, AS24349 (CERNET2 IX at Peking University), a network registered in China with APNIC, originates 4 IPv4 prefixes covering 197k addresses and 63 IPv6 prefixes. By IPv4 address space that makes it the 1,377th-largest of the 79,516 networks we see originating IPv4, and the 85th-largest of 607 in China. It is seen behind 2 upstream networks, most often AS23910 (China Next Generation Internet CERNET2) and AS4538 (China Education and Research Network…). 91% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 1% of its routes reach at least 90% of full-feed peers, and 67 prefixes are also originated by another network.
At a glance
IPv4 prefixes
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS24349 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS24349 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
4
adjacent networks
- Upstreams
- 250%
- Peers
- 250%
- Downstreams
- 00%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS23910China Next Generation Internet CERNET2 | CN | Peer | 497 | 63 |
| AS4538China Education and Research Network Center | CN | Peer | 8 | 2 |
Prefixes
All 67The largest blocks AS24349 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 115.27.0.0/16 | 65.5k | 2/81 |
| 183.174.0.0/16 | 65.5k | 2/81 |
| 162.105.0.0/17 | 32.8k | 2/81 |
| 162.105.128.0/17 | 32.8k | 2/81 |
| 2401:ec00::/32 | 4.3B × /64 | 63/64 |
| 240c:c001::/32 | 4.3B × /64 | 7/64 |
| 240c:c017::/32 | 4.3B × /64 | 7/64 |
| 240c:c019::/32 | 4.3B × /64 | 7/64 |
| 240c:c02f::/32 | 4.3B × /64 | 7/64 |
| 2001:250:205::/48 | 65.5k × /64 | 7/64 |
Routing health
How AS24349'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
- Valid91.0%61
- Invalid0.0%0
- No ROA9.0%6
Propagation
- Globally propagated90% of full-feed peers or more1.5%1
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%98.5%66
Prefix sizes
IPv4 — 4 prefixes
IPv6 — 63 prefixes
- /324.3B × /647.9%5
- /4865.5k × /6492.1%58
Recent changes
Announcements that started or stopped since 28th Aug 2026.
- Withdrawn162.105.126.0/2421st Sept 2026
- Withdrawn202.112.7.0/2421st Sept 2026
- Withdrawn211.68.72.0/2121st Sept 2026
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.