asn.dev

Observed topology

AS12732 GUTCON-NET Carrier51 GmbH, GutCon GmbH

Unclassified RIPE NSP

Upstreams 19 carry this network
Downstreams 7 this network carries
Adjacent (IPv4) 25
Adjacent (IPv6) 24
Upstream graph Who carries AS12732, and who carries them, drawn as a map up to the transit-free core. 5 exchanges Where AS12732 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 19

Networks observed carrying traffic for AS12732: 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
AS30742Bremen Briteline GmbHUnclassifiedIPv4 IPv6205
AS3356Level 3 Parent, LLCTransitIPv4 IPv6164
AS174Cogent Communications, LLCTransitIPv4 IPv669
AS5405Inter.link GmbHUnclassifiedIPv4 IPv658
AS6939Hurricane Electric LLCTransitIPv4 IPv645
AS9002RETN LimitedUnclassifiedIPv66
AS34549meerfarbig GmbH & Co. KGHostingIPv46
AS24482SG.GSHostingIPv4 IPv65
AS6797GlobalConnect ABUnclassifiedIPv42
AS20485Joint Stock Company TransTeleComUnclassifiedIPv42

All 19 upstreams →

Transit

Downstream networks

inferred

Networks for which AS12732 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS8875sinma GmbHHostingIPv4 IPv6931
AS44716D-hosting die Rackspace & Connectivity GmbHHostingIPv4540
AS15657Speedbone Internet & Connectivity GmbHHostingIPv4 IPv6334
AS203965FRITZ! Technology GmbHUnclassifiedIPv4 IPv6199
AS25516init AG fuer digitale KommunikationHostingIPv4 IPv6110
AS39614Dawico Deutschland GmbHUnclassifiedIPv4 IPv677
AS201257Johannes BehrndtUnclassifiedIPv633

Adjacency

Adjacent networks

All 30

Every AS seen directly next to AS12732 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS8875sinma GmbHHostingIPv4 IPv6931
AS3356Level 3 Parent, LLCTransitIPv4 IPv6847
AS5405Inter.link GmbHUnclassifiedIPv4 IPv6612
AS44716D-hosting die Rackspace & Connectivity GmbHHostingIPv4540
AS174Cogent Communications, LLCTransitIPv4 IPv6427
AS15657Speedbone Internet & Connectivity GmbHHostingIPv4 IPv6342
AS6939Hurricane Electric LLCTransitIPv4 IPv6330
AS30742Bremen Briteline GmbHUnclassifiedIPv4 IPv6205
AS203965FRITZ! Technology GmbHUnclassifiedIPv4 IPv6199
AS25516init AG fuer digitale KommunikationHostingIPv4 IPv6110

All 30 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-22 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.12M 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.