asn.dev

Observed topology

AS174 COGENT-174

Transit DROP-listed space ARIN

Upstreams 58 carry this network
Downstreams 6,423 this network carries
Adjacent (IPv4) 6,452
Adjacent (IPv6) 2,726
Upstream graph Who carries AS174, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS174 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 58

Networks observed carrying traffic for AS174: 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
AS1299Arelion Sweden ABTransitIPv4 IPv622,008
AS3356Level 3 Parent, LLCTransitIPv4 IPv615,084
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv68,738
AS22652Videotron LteeResidentialIPv4 IPv67,743
AS2914NTT America, Inc.TransitIPv45,569
AS7018AT&T Enterprises, LLCResidentialIPv4 IPv64,413
AS50300CustodianDC LimitedUnclassifiedIPv4 IPv64,369
AS39392SH.cz s.r.o.HostingIPv4 IPv64,335
AS577Bell CanadaMobileIPv4 IPv64,250
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv64,244

All 58 upstreams →

Transit

Downstream networks

All 6,423

Networks for which AS174 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS16509Amazon.com, Inc.HostingIPv4 IPv6213,457
AS8151UNINETMobileIPv4 IPv6189,409
AS7545TPG Telecom LimitedResidentialIPv4 IPv6176,513
AS7552Viettel GroupMobileIPv4 IPv659,179
AS36352HostPapaHostingIPv448,599
AS9009M247 Europe SRLHostingIPv4 IPv647,147
AS11172Alestra, S. de R.L. de C.V.UnclassifiedIPv4 IPv641,373
AS13999Mega Cable, S.A. de C.V.UnclassifiedIPv4 IPv640,988
AS11776BreezelineResidentialIPv436,741
AS5650Frontier Communications of America, Inc.ResidentialIPv430,457

All 6,423 downstreams →

Adjacency

Adjacent networks

All 6,452

Every AS seen directly next to AS174 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS327727C-Squared LimitedUnclassifiedIPv41,069,556
AS3356Level 3 Parent, LLCTransitIPv4 IPv6938,722
AS1299Arelion Sweden ABTransitIPv4 IPv6861,841
AS58057Securebit AGUnclassifiedIPv4 IPv6678,216
AS50673Serverius Holding B.V.UnclassifiedIPv4556,220
AS198978Alkante SASUnclassifiedIPv4 IPv6513,381
AS22652Videotron LteeResidentialIPv4 IPv6500,161
AS3130RGnet OUUnclassifiedIPv4480,709
AS971PureVoltage Hosting Inc.UnclassifiedIPv4479,904
AS7018AT&T Enterprises, LLCResidentialIPv4 IPv6370,487

All 6,452 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-12 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.21M 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.