asn.dev

Observed topology

AS19108 SUDDENLINK-COMMUNICATIONS - Optimum

Unclassified ARIN

Upstreams 10 carry this network
Downstreams 70 this network carries
Adjacent (IPv4) 77
Adjacent (IPv6) 13
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
AS6461Zayo BandwidthTransitIPv4 IPv67,736
AS1299Arelion Sweden ABTransitIPv4 IPv66,202
AS174Cogent Communications, LLCTransitIPv4 IPv63,609
AS6939Hurricane Electric LLCTransitIPv43,568
AS3303Swisscom (Schweiz) AGResidentialIPv4428
AS14907Wikimedia Foundation Inc.HostingIPv4 IPv6381
AS5650Frontier Communications of America, Inc.ResidentialIPv4116
AS3356Level 3 Parent, LLCTransitIPv416
AS6327Shaw CommunicationsResidentialIPv416
AS29838Atlantic Metro Communications II, Inc.HostingIPv415

Transit

Downstream networks

All 70

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

ASNetworkTypeFamiliesPaths seen
AS53488Optimum OnlineUnclassifiedIPv44,834
AS398089Raven Rock Networks, Inc.UnclassifiedIPv4 IPv61,018
AS393737CpuonsiteUnclassifiedIPv4 IPv6795
AS12231Conway CorporationUnclassifiedIPv4569
AS3801Mikrotec Internet ServicesHostingIPv4 IPv6470
AS393393Amarillo ISDUnclassifiedIPv4464
AS35894Northern Arkansas Telephone CompanyUnclassifiedIPv4452
AS22191Wilkes Communications, Inc.UnclassifiedIPv4354
AS11135Cross Development/Montgomery LPHostingIPv4248
AS32927Cleco CorporationUnclassifiedIPv4248

All 70 downstreams →

Adjacency

Adjacent networks

All 80

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

ASNetworkTypeFamiliesPaths seen
AS6461Zayo BandwidthTransitIPv4 IPv612,242
AS1299Arelion Sweden ABTransitIPv4 IPv611,465
AS174Cogent Communications, LLCTransitIPv4 IPv66,033
AS6939Hurricane Electric LLCTransitIPv44,973
AS53488Optimum OnlineUnclassifiedIPv44,834
AS398089Raven Rock Networks, Inc.UnclassifiedIPv4 IPv61,018
AS393737CpuonsiteUnclassifiedIPv4 IPv6795
AS3303Swisscom (Schweiz) AGResidentialIPv4630
AS14907Wikimedia Foundation Inc.HostingIPv4 IPv6627
AS12231Conway CorporationUnclassifiedIPv4569

All 80 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.