asn.dev

Observed topology

AS9931 CAT-AP The Communication Authoity of Thailand, CAT

Residential APNIC Cable/DSL/ISP

Upstreams 3 carry this network
Downstreams 52 this network carries
Adjacent (IPv4) 52
Adjacent (IPv6) 28
Upstream graph Who carries AS9931, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS9931 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS9931: 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
AS4651National Telecom Public Company LimitedUnclassifiedIPv4 IPv645,892
AS24482SG.GSHostingIPv4 IPv6793
AS38040TOT Public Company LimitedUnclassifiedIPv4208

Transit

Downstream networks

All 52

Networks for which AS9931 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS135566National Telecom Public Company LimitedUnclassifiedIPv4 IPv63,407
AS45575Rajamangala University of Technology SrivijayaUnclassifiedIPv4 IPv6966
AS9335National Telecom Public Company LimitedHostingIPv4916
AS38296National Science and Technology Development AgencyUnclassifiedIPv4616
AS38293Ministry of Foreign AffairsUnclassifiedIPv4 IPv6487
AS133947Metropolitan Electricity AuthorityUnclassifiedIPv4 IPv6427
AS9464Prince of Songkla University (Sritrang'NET)EducationIPv4 IPv6413
AS23900Planet Online Laos, Internet Service Provider in LAO PDRUnclassifiedIPv4346
AS45533Comptroller General's DepartmentUnclassifiedIPv4 IPv6295
AS140699Royal Thai ArmyUnclassifiedIPv4 IPv6279

All 52 downstreams →

Adjacency

Adjacent networks

All 57

Every AS seen directly next to AS9931 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS4651National Telecom Public Company LimitedUnclassifiedIPv4 IPv659,820
AS135566National Telecom Public Company LimitedUnclassifiedIPv4 IPv65,520
AS24482SG.GSHostingIPv4 IPv6987
AS45575Rajamangala University of Technology SrivijayaUnclassifiedIPv4 IPv6966
AS9335National Telecom Public Company LimitedHostingIPv4916
AS38296National Science and Technology Development AgencyUnclassifiedIPv4616
AS38293Ministry of Foreign AffairsUnclassifiedIPv4 IPv6487
AS133947Metropolitan Electricity AuthorityUnclassifiedIPv4 IPv6427
AS9464Prince of Songkla University (Sritrang'NET)EducationIPv4 IPv6413
AS23900Planet Online Laos, Internet Service Provider in LAO PDRUnclassifiedIPv4369

All 57 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.