asn.dev

Observed topology

AS19108 SUDDENLINK-COMMUNICATIONS

Unclassified ARIN

Upstreams 7 carry this network
Downstreams 72 this network carries
Adjacent (IPv4) 79
Adjacent (IPv6) 15
Upstream graph Who carries AS19108, and who carries them, drawn as a map up to the transit-free core. 4 exchanges Where AS19108 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS19108: 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
AS3356Level 3 Parent, LLCTransitIPv4 IPv67,720
AS1299Arelion Sweden ABTransitIPv4 IPv67,288
AS6939Hurricane Electric LLCTransitIPv43,492
AS174Cogent Communications, LLCTransitIPv4 IPv63,082
AS3303Swisscom (Schweiz) AGResidentialIPv4415
AS14907Wikimedia Foundation Inc.HostingIPv4 IPv6380
AS5650Frontier Communications of America, Inc.ResidentialIPv4116

Transit

Downstream networks

All 72

Networks for which AS19108 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS53488Optimum OnlineUnclassifiedIPv44,713
AS398089Raven Rock Networks, Inc.UnclassifiedIPv4 IPv61,064
AS393737CpuonsiteUnclassifiedIPv4 IPv6537
AS12231Conway CorporationUnclassifiedIPv4527
AS3801Mikrotec Internet ServicesHostingIPv4 IPv6470
AS393393Amarillo ISDUnclassifiedIPv4456
AS35894Northern Arkansas Telephone CompanyUnclassifiedIPv4399
AS22191Wilkes Communications, Inc.UnclassifiedIPv4345
AS32458IND. CO. CABLE TV, INC.UnclassifiedIPv4 IPv6279
AS32927Cleco CorporationUnclassifiedIPv4208

All 72 downstreams →

Adjacency

Adjacent networks

All 81

Every AS seen directly next to AS19108 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv613,599
AS3356Level 3 Parent, LLCTransitIPv4 IPv610,456
AS174Cogent Communications, LLCTransitIPv4 IPv65,559
AS6939Hurricane Electric LLCTransitIPv44,879
AS53488Optimum OnlineUnclassifiedIPv44,713
AS398089Raven Rock Networks, Inc.UnclassifiedIPv4 IPv61,064
AS14907Wikimedia Foundation Inc.HostingIPv4 IPv6656
AS3303Swisscom (Schweiz) AGResidentialIPv4619
AS3801Mikrotec Internet ServicesHostingIPv4 IPv6549
AS393737CpuonsiteUnclassifiedIPv4 IPv6537

All 81 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-23 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.15M 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.