AS4538

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

China Education and Research Network Center Education registered in China

5,056IPv4 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 5,056 IPv4 prefixes + 918 IPv6 prefixes. Rank in China: #2. Allocated: 2002-08-01.

IPv4 5,056IPv6 918

Announced prefixes · 5,974

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
v4 121.251.176.0/20 unknown
v4 121.251.192.0/20 unknown
v4 121.251.208.0/21 unknown
v4 121.251.216.0/21 unknown
v4 121.251.224.0/20 unknown
v4 121.251.24.0/23 unknown
v4 121.251.240.0/20 unknown
v4 121.251.26.0/23 unknown
v4 121.251.28.0/23 unknown
v4 121.251.32.0/22 unknown
v4 121.251.36.0/23 unknown
v4 121.251.48.0/23 unknown
v4 121.251.50.0/23 unknown
v4 121.251.52.0/24 valid
v4 121.251.56.0/23 unknown
v4 121.251.64.0/20 unknown
v4 121.251.88.0/21 unknown
v4 121.48.0.0/15 unknown
v4 121.48.0.0/20 unknown
v4 121.48.112.0/24 valid
v4 121.48.113.0/24 valid
v4 121.48.114.0/24 valid
v4 121.48.115.0/24 valid
v4 121.48.120.0/21 unknown
v4 121.48.128.0/20 unknown
v4 121.48.144.0/22 unknown
v4 121.48.152.0/21 unknown
v4 121.48.160.0/20 unknown
v4 121.48.17.0/24 valid
v4 121.48.176.0/20 unknown

RPKI: rpki.cloudflare.com · 2026-06-23

— 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
2026-06-23	5974

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AS4538

Announced prefixes · 5,974

Prefix history

AS topology · Customer cone 17

Providers · 12

Peers · 33

Customers · 15

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