asn.dev

Observed topology

AS12042 ENVENTIS - Fidium

Residential ARIN Cable/DSL/ISP

Upstreams 6 carry this network
Downstreams 40 this network carries
Adjacent (IPv4) 45
Adjacent (IPv6) 12
Upstream graph Who carries AS12042, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS12042 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS12042: 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
AS6461Zayo BandwidthTransitIPv4 IPv64,091
AS174Cogent Communications, LLCTransitIPv4 IPv62,238
AS6939Hurricane Electric LLCTransitIPv656
AS13576SDN CommunicationsResidentialIPv441
AS64289Macarne.comUnclassifiedIPv429
AS57University of MinnesotaUnclassifiedIPv414

Transit

Downstream networks

All 40

Networks for which AS12042 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS26039Athene Annuity and Life CompanyUnclassifiedIPv4390
AS21873Northeast Service Cooperative (ASN-NEWMN)UnclassifiedIPv4387
AS11517Blue Cross & Blue Shield of MinnesotaUnclassifiedIPv4382
AS16595The Toro CompanyUnclassifiedIPv4190
AS14230ARK Data Centers LLCUnclassifiedIPv4 IPv6178
AS22111Mattersight CorporationUnclassifiedIPv4177
AS25754Blueprint America, Inc.UnclassifiedIPv4174
AS53740optbit LLCUnclassifiedIPv4 IPv6168
AS400115Treehouse Broadband, LLCUnclassifiedIPv4 IPv6129
AS36677Katun CorporationUnclassifiedIPv4117

All 40 downstreams →

Adjacency

Adjacent networks

All 46

Every AS seen directly next to AS12042 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS6461Zayo BandwidthTransitIPv4 IPv66,730
AS174Cogent Communications, LLCTransitIPv4 IPv63,453
AS26039Athene Annuity and Life CompanyUnclassifiedIPv4390
AS21873Northeast Service Cooperative (ASN-NEWMN)UnclassifiedIPv4387
AS11517Blue Cross & Blue Shield of MinnesotaUnclassifiedIPv4382
AS14230ARK Data Centers LLCUnclassifiedIPv4 IPv6248
AS6939Hurricane Electric LLCTransitIPv6209
AS16595The Toro CompanyUnclassifiedIPv4190
AS22111Mattersight CorporationUnclassifiedIPv4177
AS25754Blueprint America, Inc.UnclassifiedIPv4174

All 46 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-14 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.46M 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.