asn.dev

Observed topology

AS22561 CENTURYLINK-LEGACY-LIGHTCORE

Unclassified ARIN NSP

Upstreams 1 carry this network
Downstreams 12 this network carries
Adjacent (IPv4) 13
Adjacent (IPv6) 0
Upstream graph Who carries AS22561, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS22561 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS22561: 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
AS209CenturyLink Communications, LLCResidentialIPv419,660

Transit

Downstream networks

All 12

Networks for which AS22561 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS2379CenturyLink Communications, LLCUnclassifiedIPv46,466
AS11398CenturyLink Communications, LLCResidentialIPv43,904
AS6222CenturyLink Communications, LLCResidentialIPv42,257
AS23126CenturyLink Communications, LLCUnclassifiedIPv41,098
AS5778CenturyLink Communications, LLCResidentialIPv4518
AS4282CenturyLink Communications, LLCResidentialIPv4244
AS13787CenturyLink Communications, LLCUnclassifiedIPv4243
AS4283CenturyLink Communications, LLCResidentialIPv4183
AS4284CenturyLink Communications, LLCResidentialIPv4183
AS22186CenturyLink Communications, LLCUnclassifiedIPv4183

All 12 downstreams →

Adjacency

Adjacent networks

All 13

Every AS seen directly next to AS22561 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS209CenturyLink Communications, LLCResidentialIPv435,010
AS2379CenturyLink Communications, LLCUnclassifiedIPv46,466
AS11398CenturyLink Communications, LLCResidentialIPv43,904
AS6222CenturyLink Communications, LLCResidentialIPv42,257
AS23126CenturyLink Communications, LLCUnclassifiedIPv41,098
AS5778CenturyLink Communications, LLCResidentialIPv4518
AS4282CenturyLink Communications, LLCResidentialIPv4244
AS13787CenturyLink Communications, LLCUnclassifiedIPv4243
AS4283CenturyLink Communications, LLCResidentialIPv4183
AS4284CenturyLink Communications, LLCResidentialIPv4183

All 13 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-31 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.50M 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.