asn.dev

Observed topology

AS7497 CSTNET-AS-AP - Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)

Education APNIC

Upstreams 14 carry this network
Downstreams 5 this network carries
Adjacent (IPv4) 21
Adjacent (IPv6) 8
Upstream graph Who carries AS7497, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS7497 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 14

Networks observed carrying traffic for AS7497: the AS immediately before it in a routing path. Ranked by how many paths showed the relationship, which reflects how widely it is used, not how much traffic crosses it.

ASNetworkTypeFamiliesPaths seen
AS174Cogent Communications, LLCTransitIPv4 IPv616,693
AS3491PCCW Global (HK) Ltd.TransitIPv4 IPv67,939
AS6939Hurricane Electric LLCTransitIPv43,305
AS11537Internet2UnclassifiedIPv4946
AS4635Hong Kong Internet Exchange--Route Server 1UnclassifiedIPv4878
AS4134No.31,Jin-rong StreetResidentialIPv4 IPv6662
AS23855Singapore Advanced Research and Education NetworkUnclassifiedIPv4 IPv6635
AS293ESnetUnclassifiedIPv4470
AS1103SURF B.V.UnclassifiedIPv4468
AS4837CHINA UNICOM China169 BackboneMobileIPv4467

All 14 upstreams →

Transit

Downstream networks

inferred

Networks for which AS7497 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS24151China Internet Network Infomation CenterUnclassifiedIPv4 IPv61,005
AS38345Internet Domain Name System Beijing Engineering Resrarch Center Ltd.UnclassifiedIPv4 IPv6886
AS63555Beijing Beilong Yunhai Network Data Technology CorporationUnclassifiedIPv4 IPv6765
AS4538China Education and Research Network CenterEducationIPv443
AS24409China Internet Network Infomation CenterUnclassifiedIPv425

Adjacency

Adjacent networks

All 22

Every AS seen directly next to AS7497 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS174Cogent Communications, LLCTransitIPv4 IPv618,223
AS3491PCCW Global (HK) Ltd.TransitIPv4 IPv68,978
AS6939Hurricane Electric LLCTransitIPv43,305
AS24151China Internet Network Infomation CenterUnclassifiedIPv4 IPv61,084
AS11537Internet2UnclassifiedIPv4946
AS38345Internet Domain Name System Beijing Engineering Resrarch Center Ltd.UnclassifiedIPv4 IPv6945
AS4635Hong Kong Internet Exchange--Route Server 1UnclassifiedIPv4878
AS63555Beijing Beilong Yunhai Network Data Technology CorporationUnclassifiedIPv4 IPv6765
AS4134No.31,Jin-rong StreetResidentialIPv4 IPv6693
AS23855Singapore Advanced Research and Education NetworkUnclassifiedIPv4 IPv6684

All 22 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-04 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.33M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.

Inferred from path position, not from any declaration by either party. A network appearing here is carrying these routes; whether that is a paid transit arrangement, a backup, or something else is not something routing data can tell you. Adjacency is not the same as peering. Being next to each other in a path covers paid transit, settlement-free peering and customer connections alike, and routing data cannot distinguish them. Treat this as "these networks exchange routes", nothing more specific.

Cross-check against RIPEstat or BGP.tools, which observe from a different and larger set of vantage points.