Observed topology

AS131423 LVHN-AS-VN Branch of Long Van System Solution JSC - Hanoi

Unclassified APNIC

Upstreams 6 carry this network

Downstreams 2 this network carries

Adjacent (IPv4) 8

Adjacent (IPv6) 1

Upstream graph Who carries AS131423, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS131423 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS131423: 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
AS59796	StormWall s.r.o.	Unclassified	IPv4	974
AS135905	VIETNAM POSTS AND TELECOMMUNICATIONS GROUP	Unclassified	IPv4	291
AS18403	FPT Telecom Company	Residential	IPv4 IPv6	259
AS396998	Path Network, Inc.	Unclassified	IPv4	141
AS38733	CMC Telecom Infrastructure Company	Unclassified	IPv4	27
AS43298	Storm Networks LLC	Unclassified	IPv4	23

Transit

Downstream networks

inferred

Networks for which AS131423 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS154706	Fibo Connect Joint Stock Company	Unclassified	IPv4	59
AS150823	FAST SOFTWARE JOINT STOCK COMPANY	Unclassified	IPv4	58

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS131423 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS59796	StormWall s.r.o.	Unclassified	IPv4	974
AS18403	FPT Telecom Company	Residential	IPv4 IPv6	376
AS135905	VIETNAM POSTS AND TELECOMMUNICATIONS GROUP	Unclassified	IPv4	291
AS396998	Path Network, Inc.	Unclassified	IPv4	141
AS154706	Fibo Connect Joint Stock Company	Unclassified	IPv4	59
AS150823	FAST SOFTWARE JOINT STOCK COMPANY	Unclassified	IPv4	58
AS38733	CMC Telecom Infrastructure Company	Unclassified	IPv4	27
AS43298	Storm Networks LLC	Unclassified	IPv4	23

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-20 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.16M 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.