asn.dev

Observed topology

AS27563 SEGRA-UNITY

Unclassified ARIN

Upstreams 4 carry this network
Downstreams 15 this network carries
Adjacent (IPv4) 18
Adjacent (IPv6) 10
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 IPv61,044
AS174Cogent Communications, LLCTransitIPv4 IPv6442
AS6939Hurricane Electric LLCTransitIPv4 IPv6404
AS3257GTT Communications Inc.TransitIPv4 IPv6331

Transit

Downstream networks

All 15

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

ASNetworkTypeFamiliesPaths seen
AS29765DataChambers, LLCHostingIPv4 IPv6544
AS18934TenHats, LLCUnclassifiedIPv4212
AS393724Trident Technical CollegeUnclassifiedIPv4174
AS393251Francis Marion UniversityUnclassifiedIPv4116
AS26793ICS Advanced TechnologiesUnclassifiedIPv696
AS2711Spirit CommunicationsUnclassifiedIPv492
AS53929-Reserved AS-UnclassifiedIPv489
AS11402Charlotte Colocation Center, LLcHostingIPv488
AS396141BARC ConnectsUnclassifiedIPv4 IPv680
AS401353Boost Run LLCUnclassifiedIPv464

All 15 downstreams →

Adjacency

Adjacent networks

All 19

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

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv62,128
AS3257GTT Communications Inc.TransitIPv4 IPv61,464
AS174Cogent Communications, LLCTransitIPv4 IPv6867
AS2711Spirit CommunicationsUnclassifiedIPv4667
AS29765DataChambers, LLCHostingIPv4 IPv6600
AS6939Hurricane Electric LLCTransitIPv4 IPv6404
AS18934TenHats, LLCUnclassifiedIPv4212
AS46177White Sky HostingUnclassifiedIPv4 IPv6212
AS396141BARC ConnectsUnclassifiedIPv4 IPv6192
AS393724Trident Technical CollegeUnclassifiedIPv4174

All 19 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-21 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.14M 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.