asn.dev

Observed topology

AS27720 AS27720 - CITTA TELECOM LTDA

Unclassified APNIC NSP

Upstreams 8 carry this network
Downstreams 2 this network carries
Adjacent (IPv4) 9
Adjacent (IPv6) 7
Upstream graph Who carries AS27720, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS27720 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS27720: 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
AS28663FLYS INTERATIVA LTDAUnclassifiedIPv4 IPv6699
AS2914NTT America, Inc.TransitIPv4 IPv6658
AS6939Hurricane Electric LLCTransitIPv4 IPv6606
AS262444XTURBO PROVEDOR DE INTERNET LTDAResidentialIPv6190
AS22381SAMM TECNOLOGIA E TELECOMUNICACOES S.AUnclassifiedIPv494
AS26615TIM S/AMobileIPv4 IPv693
AS24482SG.GSHostingIPv4 IPv650
AS52863UPX TECNOLOGIA LTDAUnclassifiedIPv422

Transit

Downstream networks

inferred

Networks for which AS27720 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS28336Dekanet Comunicacao Multimidia Ltda.UnclassifiedIPv4180
AS263584WanHouse Solucoes em Tecnologia LTDA - EPPUnclassifiedIPv4 IPv695

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS27720 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS28663FLYS INTERATIVA LTDAUnclassifiedIPv4 IPv6813
AS2914NTT America, Inc.TransitIPv4 IPv6765
AS6939Hurricane Electric LLCTransitIPv4 IPv6642
AS262444XTURBO PROVEDOR DE INTERNET LTDAResidentialIPv6190
AS28336Dekanet Comunicacao Multimidia Ltda.UnclassifiedIPv4180
AS26615TIM S/AMobileIPv4 IPv6102
AS263584WanHouse Solucoes em Tecnologia LTDA - EPPUnclassifiedIPv4 IPv695
AS22381SAMM TECNOLOGIA E TELECOMUNICACOES S.AUnclassifiedIPv494
AS24482SG.GSHostingIPv4 IPv655
AS52863UPX TECNOLOGIA LTDAUnclassifiedIPv426

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-13 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.40M 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.