asn.dev

Observed topology

AS21334 ASN-ONE-HU 2Connect Telecommunications Infrastructure & Network Services Ltd.

Unclassified RIPE

Upstreams 5 carry this network
Downstreams 17 this network carries
Adjacent (IPv4) 22
Adjacent (IPv6) 8
Upstream graph Who carries AS21334, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS21334 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS21334: 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 IPv61,780
AS9002RETN LimitedUnclassifiedIPv4 IPv61,366
AS6939Hurricane Electric LLCTransitIPv4 IPv6719
AS3303Swisscom (Schweiz) AGResidentialIPv464
AS33891Core-Backbone GmbHHostingIPv464

Transit

Downstream networks

All 17

Networks for which AS21334 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS35311PR-TELECOM Zrt.ResidentialIPv4 IPv6544
AS24991Datatrans Internet LtdUnclassifiedIPv4 IPv6265
AS206814SCI-Network pInc.UnclassifiedIPv494
AS207693Telekabel Ltd.UnclassifiedIPv4 IPv690
AS208839Gergi Halo Kft.UnclassifiedIPv4 IPv689
AS22081Citigroup Inc.UnclassifiedIPv464
AS8696One Hungary Ltd.MobileIPv459
AS43860Dijbeszedo Holding ZrtUnclassifiedIPv457
AS51096Magyar Orszagos Kozjegyzoi KamaraUnclassifiedIPv457
AS200933Teranet.hu Szolgaltato KftUnclassifiedIPv457

All 17 downstreams →

Adjacency

Adjacent networks

All 22

Every AS seen directly next to AS21334 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv62,805
AS9002RETN LimitedUnclassifiedIPv4 IPv61,731
AS6939Hurricane Electric LLCTransitIPv4 IPv6931
AS35311PR-TELECOM Zrt.ResidentialIPv4 IPv6544
AS24991Datatrans Internet LtdUnclassifiedIPv4 IPv6265
AS200933Teranet.hu Szolgaltato KftUnclassifiedIPv4115
AS206814SCI-Network pInc.UnclassifiedIPv494
AS33891Core-Backbone GmbHHostingIPv493
AS207693Telekabel Ltd.UnclassifiedIPv4 IPv690
AS208839Gergi Halo Kft.UnclassifiedIPv4 IPv689

All 22 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-07 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 72.97M 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.