asn.dev

Observed topology

AS54004 LIGHTPATH - Cablevision Lightpath LLC

Unclassified DROP-listed space ARIN

Upstreams 6 carry this network
Downstreams 334 this network carries
Adjacent (IPv4) 337
Adjacent (IPv6) 23
Upstream graph Who carries AS54004, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS54004 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS54004: 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
AS6128Cablevision Systems Corp.ResidentialIPv4 IPv614,623
AS6939Hurricane Electric LLCTransitIPv4 IPv62,561
AS6461Zayo BandwidthTransitIPv41,931
AS1299Arelion Sweden ABTransitIPv4855
AS174Cogent Communications, LLCTransitIPv4538
AS394625WhiteLabel IT Solutions CorpUnclassifiedIPv42

Transit

Downstream networks

All 334

Networks for which AS54004 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS23410Nassau County BOCESUnclassifiedIPv47,737
AS32531Fordham UniversityUnclassifiedIPv43,010
AS54103MOD Mission Critical, LLCUnclassifiedIPv42,520
AS11516Eastern Suffolk BOCESEducationIPv42,378
AS394488Bergen County Vocational Technical School DistrictUnclassifiedIPv42,309
AS30036Mediacom Communications CorpResidentialIPv4 IPv62,041
AS397394Gold Coast BroadbandUnclassifiedIPv4826
AS23341Fashion Institute of TechnologyUnclassifiedIPv4764
AS27370City of BostonUnclassifiedIPv4659
AS25808Town of Concord MAUnclassifiedIPv4500

All 334 downstreams →

Adjacency

Adjacent networks

All 339

Every AS seen directly next to AS54004 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS6128Cablevision Systems Corp.ResidentialIPv4 IPv655,348
AS23410Nassau County BOCESUnclassifiedIPv47,914
AS6939Hurricane Electric LLCTransitIPv4 IPv65,481
AS32531Fordham UniversityUnclassifiedIPv43,010
AS54103MOD Mission Critical, LLCUnclassifiedIPv42,520
AS11516Eastern Suffolk BOCESEducationIPv42,378
AS394488Bergen County Vocational Technical School DistrictUnclassifiedIPv42,309
AS6461Zayo BandwidthTransitIPv4 IPv62,144
AS30036Mediacom Communications CorpResidentialIPv4 IPv62,041
AS1299Arelion Sweden ABTransitIPv4951

All 339 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-11 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 73.24M 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.