asn.dev

Observed topology

AS31641 ATLAS-COMMUNICATIONS-AS Atlas Communications (NI) Ltd

Unclassified APNIC NSP

Upstreams 13 carry this network
Downstreams 1 this network carries
Adjacent (IPv4) 4
Adjacent (IPv6) 12
Upstream graph Who carries AS31641, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS31641 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 13

Networks observed carrying traffic for AS31641: 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
AS3257GTT Communications Inc.TransitIPv4 IPv6172
AS6939Hurricane Electric LLCTransitIPv4 IPv655
AS5089Virgin Media LimitedResidentialIPv432
AS34549meerfarbig GmbH & Co. KGHostingIPv62
AS9002RETN LimitedUnclassifiedIPv61
AS17639Converge ICT Solutions Inc.UnclassifiedIPv61
AS24482SG.GSHostingIPv61
AS25091IP-Max SAUnclassifiedIPv61
AS37721Virtual Technologies & SolutionsResidentialIPv61
AS48185team.blue NVUnclassifiedIPv61

All 13 upstreams →

Transit

Downstream networks

inferred

Networks for which AS31641 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS205039Beacon Broadband LTDUnclassifiedIPv4896

Adjacency

Adjacent networks

All 14

Every AS seen directly next to AS31641 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS3257GTT Communications Inc.TransitIPv4 IPv61,068
AS205039Beacon Broadband LTDUnclassifiedIPv4896
AS6939Hurricane Electric LLCTransitIPv4 IPv655
AS5089Virgin Media LimitedResidentialIPv432
AS34549meerfarbig GmbH & Co. KGHostingIPv62
AS9002RETN LimitedUnclassifiedIPv61
AS17639Converge ICT Solutions Inc.UnclassifiedIPv61
AS24482SG.GSHostingIPv61
AS25091IP-Max SAUnclassifiedIPv61
AS37721Virtual Technologies & SolutionsResidentialIPv61

All 14 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.