AS4538

Name: AS4538 — China Education and Research Network Center
Creator: ipdex

China Education and Research Network Center Education registered in China

4,962IPv4 prefixes

918IPv6 prefixes

39%RPKI-valid

#1,787AS Rank

#2Rank in China

2002-08-01Allocated

China Education and Research Network Center (AS4538) — Education, registered in China. announces 4,962 IPv4 prefixes + 918 IPv6 prefixes. Rank in China: #2. Allocated: 2002-08-01.

IPv4 4,962IPv6 918

Announced prefixes · 5,880

v4 121.248.64.0/21 unknown
v4 121.248.72.0/21 unknown
v4 121.248.80.0/20 unknown
v4 121.248.96.0/20 unknown
v4 121.249.0.0/20 unknown
v4 121.249.128.0/20 unknown
v4 121.249.141.0/24 valid
v4 121.249.144.0/20 unknown
v4 121.249.16.0/20 unknown
v4 121.249.172.0/22 unknown
v4 121.249.192.0/20 unknown
v4 121.249.208.0/22 unknown
v4 121.249.212.0/23 unknown
v4 121.249.214.0/23 unknown
v4 121.249.216.0/21 unknown
v4 121.249.224.0/20 unknown
v4 121.249.32.0/20 unknown
v4 121.249.48.0/22 unknown
v4 121.250.0.0/15 unknown
v4 121.250.0.0/20 unknown
v4 121.250.128.0/20 unknown
v4 121.250.128.0/24 valid
v4 121.250.144.0/20 unknown
v4 121.250.16.0/21 unknown
v4 121.250.160.0/19 unknown
v4 121.250.187.0/24 valid
v4 121.250.190.0/24 valid
v4 121.250.192.0/20 unknown
v4 121.250.208.0/20 unknown
v4 121.250.224.0/21 unknown
v4 121.250.232.0/21 unknown
v4 121.250.24.0/21 unknown
v4 121.250.240.0/20 unknown
v4 121.250.32.0/20 unknown
v4 121.250.48.0/23 unknown
v4 121.250.50.0/24 valid
v4 121.250.51.0/24 valid
v4 121.250.56.0/21 unknown
v4 121.250.64.0/20 unknown
v4 121.250.80.0/21 unknown
v4 121.250.80.0/24 valid
v4 121.250.88.0/23 unknown
v4 121.250.96.0/19 unknown
v4 121.251.0.0/20 unknown
v4 121.251.128.0/24 valid
v4 121.251.132.0/22 unknown
v4 121.251.136.0/21 unknown
v4 121.251.144.0/20 unknown
v4 121.251.16.0/21 unknown
v4 121.251.160.0/20 unknown

RPKI: rpki.cloudflare.com · 2026-06-22

— Routing status unavailable

Prefix history

Announced prefixes Source: ipdex daily snapshot · sparse rows, value holds until the next change (steps)

Data table

Day	Announced prefixes
2026-06-12	5882
2026-06-13	5882
2026-06-14	5880
2026-06-16	5880
2026-06-17	5878
2026-06-19	5881
2026-06-20	5880

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AS4538

Announced prefixes · 5,880

Prefix history

AS topology · Customer cone 17

Providers · 12

Peers · 33

Customers · 15

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