asn.dev

Observed topology

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

Unclassified APNIC

Upstreams 12 carry this network
Downstreams 16 this network carries
Adjacent (IPv4) 28
Adjacent (IPv6) 19
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 12

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 IPv665
AS136968SingARENEducationIPv445
AS6939Hurricane Electric LLCTransitIPv420
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
AS7660Asia Pacific Advanced Network - JapanUnclassifiedIPv42
AS17639Converge ICT Solutions Inc.UnclassifiedIPv42

All 12 upstreams →

Transit

Downstream networks

All 16

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 IPv6635
AS23767A-STARUnclassifiedIPv4393
AS134148SingARENUnclassifiedIPv4 IPv693
AS9419Nanyang Technological UniversityEducationIPv4 IPv654
AS23864Singapre Advance Research and Education Network - National Grid Office - IHPCHostingIPv4 IPv644
AS132398Science and Engineering InstitutesUnclassifiedIPv4 IPv642
AS131475Singapore Institute of TechnologyUnclassifiedIPv428
AS9264Academia SinicaEducationIPv4 IPv65
AS45259Bruhaas (B) Sdn BhdUnclassifiedIPv44
AS50999King Abdullah University of Science and TechnologyUnclassifiedIPv64

All 16 downstreams →

Adjacency

Adjacent networks

All 29

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

ASNetworkTypeFamiliesPaths seen
AS38229Lanka Education & Research Network, NRENUnclassifiedIPv4 IPv62,980
AS7660Asia Pacific Advanced Network - JapanUnclassifiedIPv4 IPv62,243
AS7497Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)EducationIPv4 IPv6683
AS24490Trans-Eurasia Information Network (TEIN2) - SGUnclassifiedIPv4 IPv6554
AS23767A-STARUnclassifiedIPv4393
AS6939Hurricane Electric LLCTransitIPv4 IPv6338
AS9885NKN INTERNET GATEWAY NETWORKEducationIPv4 IPv6190
AS137207Joint Universities Computer Centre LimitedUnclassifiedIPv4 IPv6160
AS134148SingARENUnclassifiedIPv4 IPv6147
AS9270National Infomation Society AgencyEducationIPv4 IPv6133

All 29 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-13 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.40M 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.