asn.dev

Observed topology

AS203779 Nordfiber NORDFIBER AS

Residential RIPE NSP

Upstreams 7 carry this network
Downstreams 4 this network carries
Adjacent (IPv4) 14
Adjacent (IPv6) 11
Upstream graph Who carries AS203779, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS203779 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS203779: 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
AS3356Level 3 Parent, LLCTransitIPv4 IPv6154
AS2119Telenor Norge ASMobileIPv4 IPv6144
AS2116GLOBALCONNECT ASResidentialIPv4 IPv6107
AS6939Hurricane Electric LLCTransitIPv4 IPv678
AS50304Blix Solutions ASUnclassifiedIPv4 IPv616
AS56655Gigahost ASUnclassifiedIPv4 IPv68
AS24482SG.GSHostingIPv62

Transit

Downstream networks

inferred

Networks for which AS203779 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS202204TENEO DIGITAL ASUnclassifiedIPv4 IPv61,186
AS200665Hammerfest Energi Bredbaand ASUnclassifiedIPv4 IPv6562
AS2015963NET ASUnclassifiedIPv4 IPv6349
AS207464Varanger KraftFiber ASUnclassifiedIPv4300

Adjacency

Adjacent networks

All 14

Every AS seen directly next to AS203779 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS2119Telenor Norge ASMobileIPv4 IPv61,258
AS202204TENEO DIGITAL ASUnclassifiedIPv4 IPv61,187
AS6939Hurricane Electric LLCTransitIPv4 IPv6657
AS200665Hammerfest Energi Bredbaand ASUnclassifiedIPv4 IPv6562
AS2015963NET ASUnclassifiedIPv4 IPv6349
AS2116GLOBALCONNECT ASResidentialIPv4 IPv6347
AS3356Level 3 Parent, LLCTransitIPv4 IPv6342
AS207464Varanger KraftFiber ASUnclassifiedIPv4300
AS50304Blix Solutions ASUnclassifiedIPv4 IPv6125
AS56655Gigahost ASUnclassifiedIPv4 IPv664

All 14 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-12 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.36M 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.