Observed topology

AS45588 BTCL-ISP-AS - Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.

Unclassified RIPE Cable/DSL/ISP

Upstreams 1 carry this network

Downstreams 15 this network carries

Adjacent (IPv4) 16

Adjacent (IPv6) 2

Upstream graph Who carries AS45588, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS45588 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS45588: 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.

AS	Network	Type	Families	Paths seen
AS17494	Telecom Operator & Internet Service Provider as well	Unclassified	IPv4 IPv6	6,889

Transit

Downstream networks

All 15

Networks for which AS45588 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS137706	National University	Unclassified	IPv4	177
AS141438	Bangladesh SEZ Ltd.	Unclassified	IPv4	177
AS150304	Bangladesh Television	Unclassified	IPv4	169
AS149445	Patriot Technologies	Residential	IPv4 IPv6	151
AS150352	Sky Business Center	Unclassified	IPv4	118
AS137568	SKY SYSTEMS LTD	Unclassified	IPv4	80
AS63932	Bangladesh Computer Council	Hosting	IPv4	59
AS133766	SPEED ONE	Unclassified	IPv4	59
AS134585	DDN Communication	Unclassified	IPv4	59
AS149425	Nazrul Network Service@Saidpur	Unclassified	IPv4	59

All 15 downstreams →

Adjacency

Adjacent networks

All 16

Every AS seen directly next to AS45588 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS17494	Telecom Operator & Internet Service Provider as well	Unclassified	IPv4 IPv6	8,196
AS137706	National University	Unclassified	IPv4	177
AS141438	Bangladesh SEZ Ltd.	Unclassified	IPv4	177
AS150304	Bangladesh Television	Unclassified	IPv4	169
AS149445	Patriot Technologies	Residential	IPv4 IPv6	151
AS150352	Sky Business Center	Unclassified	IPv4	118
AS137568	SKY SYSTEMS LTD	Unclassified	IPv4	80
AS63932	Bangladesh Computer Council	Hosting	IPv4	59
AS133766	SPEED ONE	Unclassified	IPv4	59
AS134585	DDN Communication	Unclassified	IPv4	59

All 16 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-05 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 73.57M 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.