asn.dev

Observed topology

AS577 BACOM - Bell Canada

Mobile ARIN

Upstreams 21 carry this network
Downstreams 313 this network carries
Adjacent (IPv4) 320
Adjacent (IPv6) 92
Upstream graph Who carries AS577, and who carries them, drawn as a map up to the transit-free core. 5 exchanges Where AS577 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 21

Networks observed carrying traffic for AS577: 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
AS1403EBOXResidentialIPv4 IPv632,412
AS1299Arelion Sweden ABTransitIPv4 IPv621,635
AS6939Hurricane Electric LLCTransitIPv4 IPv613,825
AS3356Level 3 Parent, LLCTransitIPv4 IPv612,973
AS174Cogent Communications, LLCTransitIPv4 IPv69,227
AS2914NTT America, Inc.TransitIPv4 IPv67,948
AS3257GTT Communications Inc.TransitIPv4 IPv67,275
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4 IPv63,907
AS3491PCCW Global (HK) Ltd.TransitIPv4 IPv63,389
AS22652Videotron LteeResidentialIPv4 IPv63,377

All 21 upstreams →

Transit

Downstream networks

All 313

Networks for which AS577 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS2675Shared Services CanadaUnclassifiedIPv415,326
AS1403EBOXResidentialIPv4 IPv610,837
AS855Bell CanadaMobileIPv4 IPv67,620
AS16509Amazon.com, Inc.HostingIPv4 IPv67,400
AS35911TelebecUnclassifiedIPv4 IPv66,421
AS6079RCNResidentialIPv4 IPv65,802
AS15830Equinix (EMEA) Acquisition Enterprises B.V.HostingIPv4 IPv65,131
AS3848WorldLinx Telecommunications, Inc.UnclassifiedIPv4 IPv65,124
AS15321Groupe MaskatelUnclassifiedIPv44,018
AS174Cogent Communications, LLCTransitIPv4 IPv63,813

All 313 downstreams →

Adjacency

Adjacent networks

All 323

Every AS seen directly next to AS577 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1403EBOXResidentialIPv4 IPv62,125,310
AS3356Level 3 Parent, LLCTransitIPv4 IPv6471,677
AS1299Arelion Sweden ABTransitIPv4 IPv6360,259
AS6939Hurricane Electric LLCTransitIPv4 IPv6272,428
AS6461Zayo BandwidthTransitIPv4 IPv6196,812
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4 IPv6169,531
AS3491PCCW Global (HK) Ltd.TransitIPv4 IPv6152,601
AS174Cogent Communications, LLCTransitIPv4 IPv6145,138
AS701Verizon BusinessResidentialIPv4 IPv6123,010
AS1273IDDQD-ASBusinessIPv4 IPv673,539

All 323 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-07 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 72.97M 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.