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AS4538China Education and Research Network Center

ChinaRegistryAPNICTypeEyeball

As of 10th November 2026, AS4538 (China Education and Research Network…), an access network registered in China with APNIC, originates 5,154 IPv4 prefixes covering 43.1M addresses and 4,105 IPv6 prefixes. By IPv4 address space that makes it the 15th-largest of the 80,723 networks we see originating IPv4, and the 4th-largest of 617 in China. It is seen behind 20 upstream networks, most often AS23764 (China Telecom Global) and AS4837 (China Unicom Backbone), and in front of 23 downstream networks. 60% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 9% of its routes reach at least 90% of full-feed peers, and 4,156 prefixes are also originated by another network.

At a glance

IPv4 prefixes

5,154

IPv6 prefixes

4,105

IPv4 addresses

43.1M

IPv6 /64s

17.6T

Upstream graph

The networks AS4538 is seen behind, one and two hops out, drawn from real AS paths.

AS4538Toward the internet core
Upstream graph for AS4538: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS4538China Education a…This networkAS174Cogent Communicat…AS2914NTT America, Inc.AS4134China Telecom Bac…AS4837China Unicom Back…AS23764China Telecom Glo…AS151326DCConnect Communi…AS49544i3D.net B.VAS215859Hetzner Cloud - S…AS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS7713PT Telkom Indones…

Networks observed one and two hops upstream of AS4538 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

96

adjacent networks

Upstreams
2021%
Peers
5355%
Downstreams
2324%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS4538
NetworkCountryRelationshipPathsVantage pts
AS23764China Telecom GlobalHKPeer46,44276
AS4837China Unicom BackboneCNPeer35,8038
AS4134China Telecom BackboneCNPeer30,61618
AS174Cogent Communications, LLCUSPeer5,336133
AS2914NTT America, Inc.USPeer3,346138
AS6939Hurricane Electric LLCUSPeer2,813138
AS4635HKIX Route ServersHKPeer2,63116
AS58453China Mobile InternationalHKPeer2,015137
AS6453TATA Communications (America) IncUSPeer1,884137
AS1299Arelion (fka. Telia Carrier)SEPeer1,399139

Prefixes

All 9,259

The largest blocks AS4538 originates, widest first.

Largest prefixes originated by AS4538
PrefixAddressesVisibility
58.192.0.0/121M75/76
59.64.0.0/121M75/76
202.192.0.0/121M75/76
210.32.0.0/121M75/76
222.16.0.0/121M75/76
222.192.0.0/121M75/76
58.200.0.0/13524k75/76
125.216.0.0/13524k75/76
202.112.0.0/13524k75/76
202.192.0.0/13524k18/76

Routing health

How AS4538'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

  • Valid59.8%5,540
  • Invalid0.0%0
  • No ROA40.2%3,719

Propagation

  • Globally propagated90% of full-feed peers or more9.2%848
  • Partially propagated40% to 90%<0.1%2
  • Seen by few peersUnder 40%90.8%8,409

Prefix sizes

IPv4 — 5,154 prefixes

IPv6 — 4,105 prefixes

  • /324.3B × /6499.8%4,095
  • /4016.8M × /64<0.1%2
  • /4865.5k × /640.2%8

Recent changes

Announcements that started or stopped since 11th Oct 2026.

38 announced and 940 withdrawn in all; the most recent are shown.

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