asn.dev

Observed topology

AS21723 GOCO - GOCO TECHNOLOGY LIMITED PARTNERSHIP

Residential ARIN Cable/DSL/ISP

Upstreams 13 carry this network
Downstreams 3 this network carries
Adjacent (IPv4) 18
Adjacent (IPv6) 8
Upstream graph Who carries AS21723, and who carries them, drawn as a map up to the transit-free core. 5 exchanges Where AS21723 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 13

Networks observed carrying traffic for AS21723: 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
AS577Bell CanadaMobileIPv4 IPv61,605
AS812Rogers Communications Canada Inc.MobileIPv4 IPv61,477
AS6939Hurricane Electric LLCTransitIPv41,206
AS3356Level 3 Parent, LLCTransitIPv41,179
AS3257GTT Communications Inc.TransitIPv4 IPv61,094
AS174Cogent Communications, LLCTransitIPv4 IPv6787
AS852TELUS Communications Inc.ResidentialIPv4 IPv6691
AS6327Shaw CommunicationsResidentialIPv4362
AS1403EBOXResidentialIPv4 IPv6314
AS22652Videotron LteeResidentialIPv4 IPv6276

All 13 upstreams →

Transit

Downstream networks

inferred

Networks for which AS21723 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS21724GOCO TECHNOLOGY LIMITED PARTNERSHIPUnclassifiedIPv42,728
AS396313MocTelUnclassifiedIPv4174
AS4200633060AS4200633060UnclassifiedIPv44

Adjacency

Adjacent networks

All 18

Every AS seen directly next to AS21723 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS21724GOCO TECHNOLOGY LIMITED PARTNERSHIPUnclassifiedIPv42,728
AS6939Hurricane Electric LLCTransitIPv41,882
AS812Rogers Communications Canada Inc.MobileIPv4 IPv61,859
AS577Bell CanadaMobileIPv4 IPv61,708
AS3257GTT Communications Inc.TransitIPv4 IPv61,703
AS3356Level 3 Parent, LLCTransitIPv41,660
AS852TELUS Communications Inc.ResidentialIPv4 IPv6915
AS174Cogent Communications, LLCTransitIPv4 IPv6871
AS1403EBOXResidentialIPv4 IPv6440
AS22652Videotron LteeResidentialIPv4 IPv6402

All 18 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.