asn.dev

Observed topology

AS1241 FORTHNET-GR Forthnet

Residential RIPE Cable/DSL/ISP

Upstreams 30 carry this network
Downstreams 31 this network carries
Adjacent (IPv4) 59
Adjacent (IPv6) 22
Upstream graph Who carries AS1241, and who carries them, drawn as a map up to the transit-free core. 5 exchanges Where AS1241 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 30

Networks observed carrying traffic for AS1241: 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
AS21215UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. BeogradResidentialIPv4 IPv61,749
AS6939Hurricane Electric LLCTransitIPv4 IPv6975
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv6887
AS9002RETN LimitedUnclassifiedIPv4283
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv6192
AS52055NetIX Communications JSCUnclassifiedIPv4 IPv699
AS3333Reseaux IP Europeens Network Coordination Centre (RIPE NCC)UnclassifiedIPv4 IPv678
AS24482SG.GSHostingIPv4 IPv678
AS48185team.blue NVUnclassifiedIPv4 IPv678
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv678

All 30 upstreams →

Transit

Downstream networks

All 31

Networks for which AS1241 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS25472Nova Telecommunications & Media Single Member S.AResidentialIPv42,233
AS197746Georgios Vardikos trading as "HYPERHOSTING"UnclassifiedIPv4 IPv6595
AS50148Elliniki Radiofonia Tileorasi (ERT) SAUnclassifiedIPv4251
AS214261AUTOHELLAS TOURIST AND TRADING SOCIETE ANONYMEUnclassifiedIPv4244
AS206697Eurolife ERB General Insurance SAUnclassifiedIPv4242
AS8388ALTER EGO MEDIA S.A.UnclassifiedIPv4193
AS16013Unisystems SAUnclassifiedIPv4123
AS199382Regency Entertainment S.A.UnclassifiedIPv4101
AS24849DELTA FOODS Single Member SA.UnclassifiedIPv498
AS30850AMIEUnclassifiedIPv496

All 31 downstreams →

Adjacency

Adjacent networks

All 63

Every AS seen directly next to AS1241 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv63,301
AS21215UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. BeogradResidentialIPv4 IPv62,629
AS25472Nova Telecommunications & Media Single Member S.AResidentialIPv42,233
AS6939Hurricane Electric LLCTransitIPv4 IPv61,298
AS197746Georgios Vardikos trading as "HYPERHOSTING"UnclassifiedIPv4 IPv6595
AS9002RETN LimitedUnclassifiedIPv4 IPv6465
AS52055NetIX Communications JSCUnclassifiedIPv4 IPv6428
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv6377
AS50148Elliniki Radiofonia Tileorasi (ERT) SAUnclassifiedIPv4251
AS214261AUTOHELLAS TOURIST AND TRADING SOCIETE ANONYMEUnclassifiedIPv4244

All 63 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-30 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.49M 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.