Observed topology

AS21412 CGATES-AS UAB "Cgates"

Unclassified RIPE Cable/DSL/ISP

Upstreams 17 carry this network

Downstreams 2 this network carries

Adjacent (IPv4) 20

Adjacent (IPv6) 2

Upstream graph Who carries AS21412, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS21412 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 17

Networks observed carrying traffic for AS21412: 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
AS6939	Hurricane Electric LLC	Transit	IPv4 IPv6	1,246
AS3356	Level 3 Parent, LLC	Transit	IPv4	239
AS1299	Arelion Sweden AB	Transit	IPv4	172
AS174	Cogent Communications, LLC	Transit	IPv4	139
AS34549	meerfarbig GmbH & Co. KG	Hosting	IPv4	96
AS9002	RETN Limited	Unclassified	IPv4 IPv6	36
AS1257	Tele2 Sverige AB	Mobile	IPv4	32
AS3303	Swisscom (Schweiz) AG	Residential	IPv4	32
AS8551	Bezeq International Ltd.	Unclassified	IPv4	32
AS17639	Converge ICT Solutions Inc.	Unclassified	IPv4	32

All 17 upstreams →

Transit

Downstream networks

inferred

Networks for which AS21412 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS34857	Telekomunikaciju vartai, UAB	Unclassified	IPv4	300
AS12654	Reseaux IP Europeens Network Coordination Centre (RIPE NCC)	Unclassified	IPv4	28

Adjacency

Adjacent networks

All 20

Every AS seen directly next to AS21412 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS6939	Hurricane Electric LLC	Transit	IPv4 IPv6	1,303
AS3356	Level 3 Parent, LLC	Transit	IPv4	304
AS34857	Telekomunikaciju vartai, UAB	Unclassified	IPv4	300
AS1299	Arelion Sweden AB	Transit	IPv4	233
AS174	Cogent Communications, LLC	Transit	IPv4	139
AS34549	meerfarbig GmbH & Co. KG	Hosting	IPv4	111
AS9002	RETN Limited	Unclassified	IPv4 IPv6	71
AS13194	UAB "Bite Lietuva"	Unclassified	IPv4	54
AS3303	Swisscom (Schweiz) AG	Residential	IPv4	37
AS8551	Bezeq International Ltd.	Unclassified	IPv4	37

All 20 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.