Observed topology

AS27026 NETWORKMARYLAND

Unclassified APNIC

Upstreams 4 carry this network

Downstreams 12 this network carries

Adjacent (IPv4) 18

Adjacent (IPv6) 2

Upstream graph Who carries AS27026, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS27026 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS27026: 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.

AS	Network	Type	Families	Paths seen
AS3356	Level 3 Parent, LLC	Transit	IPv4 IPv6	637
AS10886	University of Maryland	Education	IPv4	551
AS6939	Hurricane Electric LLC	Transit	IPv4 IPv6	229
AS701	Verizon Business	Residential	IPv4	46

Transit

Downstream networks

All 12

Networks for which AS27026 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS398130	Maryland Administrative Office of the Courts (AOC)	Unclassified	IPv4	886
AS4954	Carroll County Government	Unclassified	IPv4	354
AS30067	Anne Arundel County, Maryland	Unclassified	IPv4	295
AS26297	Howard County, Maryland	Unclassified	IPv4	237
AS53302	Baltimore County Government	Unclassified	IPv4	118
AS64248	Worcester County Public Schools	Unclassified	IPv4	118
AS15268	Maryland State Archives	Unclassified	IPv4	59
AS55111	Calvert County	Unclassified	IPv4	59
AS393709	Harford County, Maryland	Unclassified	IPv4	59
AS397940	Frederick County Government	Unclassified	IPv4	59

All 12 downstreams →

Adjacency

Adjacent networks

All 18

Every AS seen directly next to AS27026 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS3356	Level 3 Parent, LLC	Transit	IPv4 IPv6	1,657
AS10886	University of Maryland	Education	IPv4	1,467
AS398130	Maryland Administrative Office of the Courts (AOC)	Unclassified	IPv4	886
AS6939	Hurricane Electric LLC	Transit	IPv4 IPv6	543
AS4954	Carroll County Government	Unclassified	IPv4	354
AS30067	Anne Arundel County, Maryland	Unclassified	IPv4	295
AS26297	Howard County, Maryland	Unclassified	IPv4	237
AS701	Verizon Business	Residential	IPv4	127
AS53302	Baltimore County Government	Unclassified	IPv4	118
AS64248	Worcester County Public Schools	Unclassified	IPv4	118

All 18 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-24 16:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.19M 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.