asn.dev

Observed topology

AS2731 HORIZONTELCOM

Unclassified ARIN Cable/DSL/ISP

Upstreams 4 carry this network
Downstreams 9 this network carries
Adjacent (IPv4) 14
Adjacent (IPv6) 2
Upstream graph Who carries AS2731, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS2731 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS2731: 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
AS174Cogent Communications, LLCTransitIPv4 IPv6292
AS3356Level 3 Parent, LLCTransitIPv4277
AS6939Hurricane Electric LLCTransitIPv479
AS20205Amplex Electric, Inc.ResidentialIPv410

Transit

Downstream networks

inferred

Networks for which AS2731 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS22765Nelsonville TV Cable IncUnclassifiedIPv4513
AS396336Holzer Health SystemUnclassifiedIPv4184
AS14945FAIRFIELD MEDICAL CENTERUnclassifiedIPv491
AS400488iZone Broadband LLC.UnclassifiedIPv4 IPv691
AS31813FreedomLinx TechnologiesUnclassifiedIPv460
AS393928Hilliard City School DistrictUnclassifiedIPv459
AS394425Adena Health SystemUnclassifiedIPv425
AS33581Peoples Bank, National AssociationUnclassifiedIPv45
AS401240Ohio Education AssociationUnclassifiedIPv42

Adjacency

Adjacent networks

All 14

Every AS seen directly next to AS2731 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS174Cogent Communications, LLCTransitIPv4 IPv6879
AS3356Level 3 Parent, LLCTransitIPv4696
AS22765Nelsonville TV Cable IncUnclassifiedIPv4513
AS396336Holzer Health SystemUnclassifiedIPv4184
AS14945FAIRFIELD MEDICAL CENTERUnclassifiedIPv491
AS400488iZone Broadband LLC.UnclassifiedIPv4 IPv691
AS6939Hurricane Electric LLCTransitIPv487
AS31813FreedomLinx TechnologiesUnclassifiedIPv460
AS393928Hilliard City School DistrictUnclassifiedIPv459
AS394425Adena Health SystemUnclassifiedIPv425

All 14 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.