asn.dev

Observed topology

AS267521 AS267521 - ULTRANET NETWORK

Residential LACNIC Cable/DSL/ISP

Upstreams 6 carry this network
Downstreams 4 this network carries
Adjacent (IPv4) 10
Adjacent (IPv6) 8
Upstream graph Who carries AS267521, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS267521 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS267521: 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
AS23106AMERICAN TOWER DO BRASIL-COMUNICACAO MULTIMIDIA LTUnclassifiedIPv4 IPv6207
AS13786Seabras 1 USA, LLCUnclassifiedIPv4 IPv6105
AS262725RG SILVEIRA LTDAResidentialIPv428
AS24482SG.GSHostingIPv4 IPv612
AS35280F5 Networks SARLHostingIPv4 IPv610
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv610

Transit

Downstream networks

inferred

Networks for which AS267521 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS266313LESTETRONICS MEUnclassifiedIPv4132
AS269500LAGARES TECNOLOGIA E COMUNICACAO LTDAUnclassifiedIPv4 IPv6119
AS262663METROFLEX TELECOMUNICACOES LTDAUnclassifiedIPv4 IPv697
AS269425RN TELECOMUNICACOES EIRELIUnclassifiedIPv41

Adjacency

Adjacent networks

All 11

Every AS seen directly next to AS267521 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS23106AMERICAN TOWER DO BRASIL-COMUNICACAO MULTIMIDIA LTUnclassifiedIPv4 IPv6411
AS13786Seabras 1 USA, LLCUnclassifiedIPv4 IPv6233
AS266313LESTETRONICS MEUnclassifiedIPv4132
AS269500LAGARES TECNOLOGIA E COMUNICACAO LTDAUnclassifiedIPv4 IPv6119
AS262663METROFLEX TELECOMUNICACOES LTDAUnclassifiedIPv4 IPv697
AS262725RG SILVEIRA LTDAResidentialIPv428
AS6939Hurricane Electric LLCTransitIPv615
AS24482SG.GSHostingIPv4 IPv614
AS35280F5 Networks SARLHostingIPv4 IPv610
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv610

All 11 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-04 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.33M 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.