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 121.193.80.0/20 unknown
v4 121.193.96.0/22 unknown
v4 121.194.0.0/15 unknown
v4 121.194.0.0/20 unknown
v4 121.194.112.0/20 unknown
v4 121.194.144.0/20 unknown
v4 121.194.16.0/20 unknown
v4 121.194.167.0/24 valid
v4 121.194.172.0/22 unknown
v4 121.194.172.0/23 unknown
v4 121.194.174.0/23 unknown
v4 121.194.176.0/20 unknown
v4 121.194.192.0/19 unknown
v4 121.194.32.0/20 unknown
v4 121.194.4.0/24 valid
v4 121.194.48.0/20 unknown
v4 121.194.64.0/20 unknown
v4 121.194.80.0/21 unknown
v4 121.194.88.0/22 unknown
v4 121.194.92.0/22 unknown
v4 121.194.96.0/20 unknown
v4 121.195.112.0/23 unknown
v4 121.195.114.0/24 valid
v4 121.195.12.0/23 unknown
v4 121.195.128.0/19 unknown
v4 121.195.14.0/23 unknown
v4 121.195.16.0/20 unknown
v4 121.195.160.0/20 unknown
v4 121.195.180.0/22 unknown
v4 121.195.186.0/24 valid
v4 121.195.188.0/23 unknown
v4 121.195.224.0/20 unknown
v4 121.195.32.0/19 unknown
v4 121.195.96.0/20 unknown
v4 121.248.0.0/14 unknown
v4 121.248.0.0/20 unknown
v4 121.248.112.0/21 unknown
v4 121.248.120.0/21 unknown
v4 121.248.128.0/19 unknown
v4 121.248.16.0/20 unknown
v4 121.248.160.0/21 unknown
v4 121.248.168.0/21 unknown
v4 121.248.176.0/21 unknown
v4 121.248.184.0/21 unknown
v4 121.248.192.0/20 unknown
v4 121.248.208.0/20 unknown
v4 121.248.224.0/19 unknown
v4 121.248.32.0/21 unknown
v4 121.248.48.0/20 unknown
v4 121.248.60.0/24 valid

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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