asn.dev

Observed topology

AS23855 SINGAREN-GIX-AS-AP Singapore Advanced Research and Education Network

Unclassified APNIC Educational/Research

Upstreams 13 carry this network
Downstreams 17 this network carries
Adjacent (IPv4) 29
Adjacent (IPv6) 20
Upstream graph Who carries AS23855, and who carries them, drawn as a map up to the transit-free core. 3 exchanges Where AS23855 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 13

Networks observed carrying traffic for AS23855: 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
AS4637Telstra GlobalUnclassifiedIPv4 IPv666
AS136968SingARENEducationIPv447
AS6939Hurricane Electric LLCTransitIPv418
AS23864Singapre Advance Research and Education Network - National Grid Office - IHPCHostingIPv44
AS134148SingARENUnclassifiedIPv64
AS1103SURF B.V.UnclassifiedIPv4 IPv63
AS24482SG.GSHostingIPv4 IPv63
AS38229Lanka Education & Research Network, NRENUnclassifiedIPv4 IPv63
AS293ESnetUnclassifiedIPv42
AS7660Asia Pacific Advanced Network - JapanUnclassifiedIPv42

All 13 upstreams →

Transit

Downstream networks

All 17

Networks for which AS23855 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS7497Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)EducationIPv4 IPv6633
AS23767A-STARUnclassifiedIPv4417
AS9419Nanyang Technological UniversityEducationIPv4 IPv6106
AS134148SingARENUnclassifiedIPv4 IPv697
AS132398Science and Engineering InstitutesUnclassifiedIPv4 IPv685
AS293ESnetUnclassifiedIPv4 IPv656
AS23864Singapre Advance Research and Education Network - National Grid Office - IHPCHostingIPv4 IPv645
AS131475Singapore Institute of TechnologyUnclassifiedIPv428
AS9270National Infomation Society AgencyEducationIPv422
AS9264Academia SinicaEducationIPv4 IPv66

All 17 downstreams →

Adjacency

Adjacent networks

All 30

Every AS seen directly next to AS23855 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS7660Asia Pacific Advanced Network - JapanUnclassifiedIPv4 IPv63,235
AS38229Lanka Education & Research Network, NRENUnclassifiedIPv4 IPv62,765
AS293ESnetUnclassifiedIPv4 IPv62,026
AS24490Trans-Eurasia Information Network (TEIN2) - SGUnclassifiedIPv4 IPv6806
AS7497Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)EducationIPv4 IPv6682
AS23767A-STARUnclassifiedIPv4417
AS6939Hurricane Electric LLCTransitIPv4 IPv6356
AS137207Joint Universities Computer Centre LimitedUnclassifiedIPv4 IPv6256
AS134148SingARENUnclassifiedIPv4 IPv6193
AS9885NKN INTERNET GATEWAY NETWORKEducationIPv4 IPv6192

All 30 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-29 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.36M 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.