Observed topology

AS25148 BASEFARM-ASN Oslo - Norway

Hosting RIPE NCC Content

Upstreams 8 carry this network

Downstreams 2 this network carries

Adjacent (IPv4) 9

Adjacent (IPv6) 4

Upstream graph Who carries AS25148, and who carries them, drawn as a map up to the transit-free core. 3 exchanges Where AS25148 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS25148: 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
AS3257	GTT Communications Inc.	Transit	IPv4 IPv6	292
AS1299	Arelion Sweden AB	Transit	IPv4	184
AS8523	Orange Business Digital Sweden AB	Hosting	IPv4 IPv6	115
AS50304	Blix Solutions AS	Unclassified	IPv4 IPv6	12
AS56655	Gigahost AS	Unclassified	IPv4 IPv6	11
AS42708	Glesys AB	Unclassified	IPv4	10
AS49788	Nexthop AS	Unclassified	IPv4	9
AS12552	GlobalConnect AB	Unclassified	IPv4	1

Transit

Downstream networks

inferred

Networks for which AS25148 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS8523	Orange Business Digital Sweden AB	Hosting	IPv4	12
AS198204	Samlerhuset Norge AS	Unclassified	IPv4	1

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS25148 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS3257	GTT Communications Inc.	Transit	IPv4 IPv6	292
AS1299	Arelion Sweden AB	Transit	IPv4	185
AS8523	Orange Business Digital Sweden AB	Hosting	IPv4 IPv6	127
AS56655	Gigahost AS	Unclassified	IPv4 IPv6	16
AS42708	Glesys AB	Unclassified	IPv4	15
AS50304	Blix Solutions AS	Unclassified	IPv4 IPv6	12
AS49788	Nexthop AS	Unclassified	IPv4	11
AS12552	GlobalConnect AB	Unclassified	IPv4	1
AS198204	Samlerhuset Norge AS	Unclassified	IPv4	1

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-29 10:00 UTC by route-views2,rrc00, as seen from 76 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.