Observed topology

AS1121 IDDQD-AS

Unclassified RIPE Route Server

Upstreams 0 carry this network

Downstreams 8 this network carries

Adjacent (IPv4) 10

Adjacent (IPv6) 0

Upstream graph Who carries AS1121, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS1121 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS1121: 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.

No upstream observed. Typical for a tier-1 network that buys transit from nobody.

Transit

Downstream networks

inferred

Networks for which AS1121 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS9146	BH Telecom d.d. Sarajevo	Residential	IPv4	12
AS25255	Hutchison Drei Austria GmbH	Residential	IPv4	8
AS2686	AT&T Enterprises, LLC	Unclassified	IPv4	7
AS51265	Mass Response Service GmbH	Residential	IPv4	5
AS8245	Video-Broadcast GmbH	Unclassified	IPv4	4
AS48943	KAPPER NETWORK-COMMUNICATIONS GmbH	Unclassified	IPv4	4
AS2614	Agentia de Administrare a Retelei Nationale de Informatica pentru Educatie si Cercetare	Education	IPv4	2
AS25467	Akton d.o.o.	Unclassified	IPv4	1

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS1121 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS23764	CTGNet	Unclassified	IPv4	46
AS9146	BH Telecom d.d. Sarajevo	Residential	IPv4	14
AS25255	Hutchison Drei Austria GmbH	Residential	IPv4	8
AS2686	AT&T Enterprises, LLC	Unclassified	IPv4	7
AS51265	Mass Response Service GmbH	Residential	IPv4	5
AS8245	Video-Broadcast GmbH	Unclassified	IPv4	4
AS48943	KAPPER NETWORK-COMMUNICATIONS GmbH	Unclassified	IPv4	4
AS2614	Agentia de Administrare a Retelei Nationale de Informatica pentru Educatie si Cercetare	Education	IPv4	2
AS13004	Serbian Open Exchange DOO	Unclassified	IPv4	1
AS25467	Akton d.o.o.	Unclassified	IPv4	1

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-25 12:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.17M 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.