asn.dev

Observed topology

AS37731 AS-WECOM

Unclassified RIPE NSP

Upstreams 0 carry this network
Downstreams 17 this network carries
Adjacent (IPv4) 22
Adjacent (IPv6) 13
Upstream graph Who carries AS37731, and who carries them, drawn as a map up to the transit-free core. 6 exchanges Where AS37731 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS37731: 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.

No upstream observed. Typical for a tier-1 network that buys transit from nobody.

Transit

Downstream networks

All 17

Networks for which AS37731 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS328137Web Squad Connect (Pty) LtdResidentialIPv4 IPv61,404
AS328583CRAZYWEB TECH (PTY) LTDResidentialIPv4 IPv61,270
AS328327ASAP Internet (Pty) LTDUnclassifiedIPv4 IPv6749
AS327907Session Telecoms(PTY) LtdUnclassifiedIPv4438
AS329243One Mile Telecoms (Pty) Ltd.UnclassifiedIPv4 IPv6289
AS328288Belanet ccUnclassifiedIPv4236
AS328444Wirelexx (Pty) LtdUnclassifiedIPv4190
AS329455ONE CarrierUnclassifiedIPv4178
AS328874GXQ IT Solutions (Pty) LtdUnclassifiedIPv4147
AS328473Be Broadband (PTY) LTDUnclassifiedIPv4120

All 17 downstreams →

Adjacency

Adjacent networks

All 22

Every AS seen directly next to AS37731 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS3491PCCW Global (HK) Ltd.TransitIPv4 IPv63,555
AS328137Web Squad Connect (Pty) LtdResidentialIPv4 IPv61,412
AS37662West Indian Ocean Cable CompanyUnclassifiedIPv4 IPv61,354
AS328583CRAZYWEB TECH (PTY) LTDResidentialIPv4 IPv61,270
AS328327ASAP Internet (Pty) LTDUnclassifiedIPv4 IPv6749
AS6939Hurricane Electric LLCTransitIPv4 IPv6498
AS327907Session Telecoms(PTY) LtdUnclassifiedIPv4 IPv6445
AS329243One Mile Telecoms (Pty) Ltd.UnclassifiedIPv4 IPv6289
AS328288Belanet ccUnclassifiedIPv4236
AS328444Wirelexx (Pty) LtdUnclassifiedIPv4190

All 22 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.