asn.dev

Observed topology

AS27665 Columbus Communications Trinidad Limited.

Mobile LACNIC

Upstreams 1 carry this network
Downstreams 8 this network carries
Adjacent (IPv4) 9
Adjacent (IPv6) 7
Upstream graph Who carries AS27665, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS27665 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS27665: 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
AS23520Columbus Networks USA, Inc.ResidentialIPv4 IPv63,568

Transit

Downstream networks

inferred

Networks for which AS27665 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS263222RVR INTERNATIONAL LIMITEDResidentialIPv4 IPv63,060
AS27789GREENDOTUnclassifiedIPv4 IPv61,946
AS26317Lisa Communications LtdUnclassifiedIPv4490
AS27800Digicel Trinidad and Tobago Ltd.UnclassifiedIPv4235
AS46764University of the West IndiesUnclassifiedIPv4 IPv6206
AS61478AIR LINK COMMUNICATIONSResidentialIPv4 IPv6206
AS28067The University of the West IndiesSt Augustine CampUnclassifiedIPv4 IPv6148
AS14789Cloudflare, Inc.UnclassifiedIPv4 IPv690

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS27665 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS23520Columbus Networks USA, Inc.ResidentialIPv4 IPv610,725
AS263222RVR INTERNATIONAL LIMITEDResidentialIPv4 IPv63,662
AS27789GREENDOTUnclassifiedIPv4 IPv62,120
AS26317Lisa Communications LtdUnclassifiedIPv4490
AS27800Digicel Trinidad and Tobago Ltd.UnclassifiedIPv4235
AS46764University of the West IndiesUnclassifiedIPv4 IPv6206
AS61478AIR LINK COMMUNICATIONSResidentialIPv4 IPv6206
AS28067The University of the West IndiesSt Augustine CampUnclassifiedIPv4 IPv6148
AS14789Cloudflare, Inc.UnclassifiedIPv4 IPv690

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-19 10:00 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.