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ASN Lookup Tool
AS4538 ERX-CERNET-BKB

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS4538
Organisation
China Education and Research Network Center Tsin..
Name
ERX-CERNET-BKB
Total IPv4 Addresses
17,121,806
Total IPv4 Prefixes
7,852
Total IPv6 Prefixes
5,110
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#24 out of 79,006
Registry
Apnic
Registered Country
CN flagCN
Registered Country Name
China
Registered Date
Registration Last Change
2020-09-03
Receiving From
ASN
Organisation
AS23910
CN flagChina Next Generation Internet CERNET2 CNGI-CERN..
AS4134
CN flagNo.31,Jin-rong Street Beijing 100032
AS4837
CN flagCHINA UNICOM China169 Backbone
AS174
US flagCogent Communications, LLC
AS9808
CN flagChina Mobile
Showing 5 of 37
Transit To
ASN
Organisation
AS138441
CN flagChina Education and Research Network (CERNET)
AS23910
CN flagChina Next Generation Internet CERNET2 CNGI-CERN..
AS4538
CN flagChina Education and Research Network Center Tsin..
AS24364
CN flagCERNET2 IX at Shanghai Jiaotong University CERNE..
AS24361
CN flagCERNET2 IX at Southeast University CERNET Center..
Showing 5 of 30
IPv4 Active Prefixes
PrefixRange FromRange To
1.51.0.0/231.51.0.01.51.1.255
1.51.2.0/241.51.2.01.51.2.255
1.51.3.0/241.51.3.01.51.3.255
1.51.4.0/221.51.4.01.51.7.255
1.51.8.0/211.51.8.01.51.15.255
Showing 5 of 7,852
IPv6 Active Prefixes
PrefixRange FromRange To
2001:250:2::/482001:250:2::2001:250:2:ffff:ffff:ffff:ffff:ffff
2001:250:205::/482001:250:205::2001:250:205:ffff:ffff:ffff:ffff:ffff
2001:250:206::/482001:250:206::2001:250:206:ffff:ffff:ffff:ffff:ffff
2001:250:207::/482001:250:207::2001:250:207:ffff:ffff:ffff:ffff:ffff
2001:250:208::/482001:250:208::2001:250:208:ffff:ffff:ffff:ffff:ffff
Showing 5 of 5,110