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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
16,911,968
Total IPv4 Prefixes
7,928
Total IPv6 Prefixes
5,899
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#23 out of 77,686
Registry
Apnic
Registered Country
CN flag CN
Registered Country Name
China
Registered Date
Registration Last Change
2020-09-03
Receiving From

The list of active Autonomous Systems (ASs) which send traffic to that ASN.

ASN
Organisation
AS23910
CN flagChina Next Generation Internet CERNET2 CNGI-CERN..
AS24372
CN flagCERNET2 IX at Harbin Institute of Technology CER..
AS4134
CN flagNo.31,Jin-rong Street Beijing 100032
AS4837
CN flagCHINA UNICOM China169 Backbone
AS174
US flagCogent Communications
Showing 5 of 38
Transit To

The list of active Autonomous Systems (ASs) which receive traffic from that ASN.

 

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 29
IPv4 Active Prefixes

This provides the list of IPv4 address space routes/prefixes currently announced on Border Gateway Protocol (BGP).

Prefix1.51.0.0/23
Range From1.51.0.0
Range To1.51.1.255
Prefix1.51.2.0/24
Range From1.51.2.0
Range To1.51.2.255
Prefix1.51.3.0/24
Range From1.51.3.0
Range To1.51.3.255
Prefix1.51.4.0/22
Range From1.51.4.0
Range To1.51.7.255
Prefix1.51.8.0/21
Range From1.51.8.0
Range To1.51.15.255
Showing 5 of 7,928
IPv6 Active Prefixes
Prefix2001:250:2::/48
Range From2001:250:2::
Range To2001:250:2:ffff:ffff:ffff:ffff:ffff
Prefix2001:250:205::/48
Range From2001:250:205::
Range To2001:250:205:ffff:ffff:ffff:ffff:ffff
Prefix2001:250:206::/48
Range From2001:250:206::
Range To2001:250:206:ffff:ffff:ffff:ffff:ffff
Prefix2001:250:207::/48
Range From2001:250:207::
Range To2001:250:207:ffff:ffff:ffff:ffff:ffff
Prefix2001:250:208::/48
Range From2001:250:208::
Range To2001:250:208:ffff:ffff:ffff:ffff:ffff
Showing 5 of 5,899
Autonomous System (AS) is a network (or collection of networks) that are all managed and supervised by a single entity or organisation. This tool provides a comprehensive ownership and connectivity report for any given AS number.