asn.dev

Observed topology

AS18683 MWFN - Midwest Fiber Networks, LLC

Unclassified ARIN

Upstreams 2 carry this network
Downstreams 19 this network carries
Adjacent (IPv4) 22
Adjacent (IPv6) 5
Upstream graph Who carries AS18683, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS18683 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS18683: 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
AS2914NTT America, Inc.TransitIPv4 IPv6267
AS6939Hurricane Electric LLCTransitIPv4 IPv661

Transit

Downstream networks

All 19

Networks for which AS18683 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS399663Kuehn NetworksUnclassifiedIPv4 IPv6245
AS39954Gateway Technical CollegeUnclassifiedIPv4232
AS22379Manifold Services IncUnclassifiedIPv4 IPv6218
AS22955Children's Hospital & Health System, Inc.UnclassifiedIPv491
AS40479Aurora Health Care, Inc.UnclassifiedIPv478
AS22401Potawatomi Bingo CasinoUnclassifiedIPv473
AS53355Concordia University WisconsinUnclassifiedIPv464
AS395849Oxide Computer CompanyUnclassifiedIPv460
AS399411Froedtert South, Inc.UnclassifiedIPv460
AS46788Milwaukee County GovernmentUnclassifiedIPv459

All 19 downstreams →

Adjacency

Adjacent networks

All 22

Every AS seen directly next to AS18683 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS2914NTT America, Inc.TransitIPv4 IPv61,506
AS6939Hurricane Electric LLCTransitIPv4 IPv6305
AS399663Kuehn NetworksUnclassifiedIPv4 IPv6245
AS39954Gateway Technical CollegeUnclassifiedIPv4232
AS22379Manifold Services IncUnclassifiedIPv4 IPv6218
AS32625OFFSITE, LLCUnclassifiedIPv4 IPv692
AS22955Children's Hospital & Health System, Inc.UnclassifiedIPv491
AS40479Aurora Health Care, Inc.UnclassifiedIPv478
AS22401Potawatomi Bingo CasinoUnclassifiedIPv473
AS53355Concordia University WisconsinUnclassifiedIPv464

All 22 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.