subnet.im

AS24353CERNET2 IX at Xi'an Jiaotong University

ChinaRegistryAPNIC

As of 27th September 2026, AS24353 (CERNET2 IX at Xi'an Jiaotong University), a network registered in China with APNIC, originates 1 IPv4 prefix covering 65.5k addresses and 103 IPv6 prefixes. By IPv4 address space that makes it the 3,620th-largest of the 79,525 networks we see originating IPv4, and the 159th-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…). Over 99% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 0% 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

1

IPv6 prefixes

103

IPv4 addresses

65.5k

IPv6 /64s

30.1B

Upstream graph

The networks AS24353 is seen behind, one and two hops out, drawn from real AS paths.

AS24353Toward the internet core
Upstream graph for AS24353: 5 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS24353CERNET2 IX at Xi'…This networkAS4538China Education a…AS23910China Next Genera…AS4837China Unicom Back…AS23764China Telecom Glo…AS4134China Telecom Bac…

Networks observed one and two hops upstream of AS24353 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.

Upstreams of AS24353
NetworkCountryRelationshipPathsVantage pts
AS23910China Next Generation Internet CERNET2CNPeer9279
AS4538China Education and Research Network CenterCNPeer22

Prefixes

All 104

The largest blocks AS24353 originates, widest first.

Largest prefixes originated by AS24353
PrefixAddressesVisibility
115.154.0.0/1665.5k2/81
240c:c283::/324.3B × /649/64
240c:c286::/324.3B × /649/64
240c:c288::/324.3B × /649/64
240c:c28f::/324.3B × /649/64
240c:c295::/324.3B × /649/64
240c:c29f::/324.3B × /649/64
240c:cfc3::/324.3B × /649/64
2001:250:1001::/4865.5k × /649/64
2001:250:1002::/4865.5k × /649/64

Routing health

How AS24353'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

  • Valid99.0%103
  • Invalid0.0%0
  • No ROA1.0%1

Propagation

  • Globally propagated90% of full-feed peers or more0.0%0
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%100.0%104

Prefix sizes

IPv4 — 1 prefixes

IPv6 — 103 prefixes

  • /324.3B × /646.8%7
  • /4865.5k × /6493.2%96

Recent changes

Announcements that started or stopped since 28th Aug 2026.

  • Announced2001:250:1017::/4823rd Sept 2026
  • Withdrawn2001:250:1017::/4821st Sept 2026
  • Withdrawn202.117.144.0/2021st Sept 2026
  • Withdrawn202.117.240.0/2021st Sept 2026
  • Withdrawn202.117.80.0/2021st Sept 2026
  • Withdrawn218.195.16.0/2121st Sept 2026
  • Withdrawn219.244.160.0/1921st Sept 2026

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.