asn.dev

Observed topology

AS27563 SEGRA-UNITY - Spirit Communications

Unclassified ARIN

Upstreams 4 carry this network
Downstreams 18 this network carries
Adjacent (IPv4) 21
Adjacent (IPv6) 11
Upstream graph Who carries AS27563, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS27563 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS27563: 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
AS1299Arelion Sweden ABTransitIPv4 IPv61,129
AS6939Hurricane Electric LLCTransitIPv4 IPv6454
AS174Cogent Communications, LLCTransitIPv4 IPv6437
AS3257GTT Communications Inc.TransitIPv4 IPv6363

Transit

Downstream networks

All 18

Networks for which AS27563 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS7795LUMOS Networks, Inc.HostingIPv44,124
AS29765DataChambers, LLCHostingIPv4 IPv6533
AS393724Trident Technical CollegeUnclassifiedIPv4171
AS393251Francis Marion UniversityUnclassifiedIPv4114
AS26793ICS Advanced TechnologiesUnclassifiedIPv693
AS2711Spirit CommunicationsUnclassifiedIPv492
AS11402Charlotte Colocation Center, LLcHostingIPv490
AS53929-Reserved AS-UnclassifiedIPv489
AS396141BARC ConnectsUnclassifiedIPv4 IPv678
AS401353Boost Run LLCUnclassifiedIPv468

All 18 downstreams →

Adjacency

Adjacent networks

All 22

Every AS seen directly next to AS27563 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv64,799
AS7795LUMOS Networks, Inc.HostingIPv44,166
AS3257GTT Communications Inc.TransitIPv4 IPv62,103
AS174Cogent Communications, LLCTransitIPv4 IPv61,693
AS2711Spirit CommunicationsUnclassifiedIPv4679
AS29765DataChambers, LLCHostingIPv4 IPv6588
AS6939Hurricane Electric LLCTransitIPv4 IPv6454
AS396141BARC ConnectsUnclassifiedIPv4 IPv6208
AS46177White Sky HostingUnclassifiedIPv4 IPv6183
AS393724Trident Technical CollegeUnclassifiedIPv4171

All 22 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-11 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 73.24M 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.