asn.dev

Observed topology

AS44066 DE-FIRSTCOLO firstcolo GmbH

Unclassified DROP-listed space RIPE

Upstreams 29 carry this network
Downstreams 77 this network carries
Adjacent (IPv4) 126
Adjacent (IPv6) 33
Upstream graph Who carries AS44066, and who carries them, drawn as a map up to the transit-free core. 3 exchanges Where AS44066 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 29

Networks observed carrying traffic for AS44066: 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
AS1299Arelion Sweden ABTransitIPv4 IPv6822
AS2914NTT America, Inc.TransitIPv4 IPv6536
AS6939Hurricane Electric LLCTransitIPv4 IPv6418
AS174Cogent Communications, LLCTransitIPv4 IPv6318
AS3257GTT Communications Inc.TransitIPv4 IPv6218
AS42708Glesys Sweden ABUnclassifiedIPv4216
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv6186
AS3320Deutsche Telekom AGMobileIPv4 IPv688
AS24482SG.GSHostingIPv4 IPv668
AS34019Hivane AssociationUnclassifiedIPv4 IPv668

All 29 upstreams →

Transit

Downstream networks

All 77

Networks for which AS44066 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS214036Ultahost, Inc.UnclassifiedIPv42,950
AS44051Fornex Hosting S.L.HostingIPv4 IPv61,555
AS18403FPT Telecom CompanyResidentialIPv4818
AS47583Hostinger International LimitedHostingIPv4501
AS49532Eonix CorporationUnclassifiedIPv4 IPv6392
AS50198SHOP APOTHEKE SERVICE GmbHUnclassifiedIPv4293
AS31400firstcolo GmbHHostingIPv4 IPv6182
AS204119ispOne business GmbHUnclassifiedIPv4 IPv6150
AS215741detacon GmbHUnclassifiedIPv4116
AS59939WIBO Baltic UABUnclassifiedIPv4 IPv691

All 77 downstreams →

Adjacency

Adjacent networks

All 130

Every AS seen directly next to AS44066 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS214036Ultahost, Inc.UnclassifiedIPv42,950
AS1299Arelion Sweden ABTransitIPv4 IPv62,400
AS42708Glesys Sweden ABUnclassifiedIPv42,243
AS44051Fornex Hosting S.L.HostingIPv4 IPv61,555
AS2914NTT America, Inc.TransitIPv4 IPv61,398
AS6939Hurricane Electric LLCTransitIPv4 IPv61,000
AS18403FPT Telecom CompanyResidentialIPv4819
AS174Cogent Communications, LLCTransitIPv4 IPv6792
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv6725
AS3257GTT Communications Inc.TransitIPv4 IPv6537

All 130 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-09 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.03M 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.