Observed topology

AS131421 INTERCOM-VN Intercom Telecom., JSC

Unclassified APNIC

Upstreams 2 carry this network

Downstreams 9 this network carries

Adjacent (IPv4) 11

Adjacent (IPv6) 0

Upstream graph Who carries AS131421, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS131421 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS131421: 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
AS24088	Hanoi Telecom Joint Stock Company - HCMC Branch	Residential	IPv4	183
AS45903	CMC Telecom Infrastructure Company	Residential	IPv4	183

Transit

Downstream networks

inferred

Networks for which AS131421 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS149069	Information and Communications Technology Company of Vietnam Electricity	Unclassified	IPv4	71
AS131430	Bao Viet Commercial Joint Stock Bank	Unclassified	IPv4	61
AS153650	MEGAMAX VIET NAM TECHNOLOGY JOINT STOCK COMPANY	Unclassified	IPv4	60
AS153780	PAYX Payment Company Limited	Unclassified	IPv4	57
AS149142	Vina Securities Joint Stock Company	Unclassified	IPv4	38
AS131438	VIETNAM POST	Unclassified	IPv4	30
AS38734	ENCAPITAL FINANCIAL TECHNOLOGY JOINT STOCK COMPANY.	Unclassified	IPv4	25
AS55315	SSI Securities Incorporation	Unclassified	IPv4	17
AS131383	PVI Holdings	Unclassified	IPv4	1

Adjacency

Adjacent networks

All 11

Every AS seen directly next to AS131421 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS24088	Hanoi Telecom Joint Stock Company - HCMC Branch	Residential	IPv4	395
AS45903	CMC Telecom Infrastructure Company	Residential	IPv4	331
AS149069	Information and Communications Technology Company of Vietnam Electricity	Unclassified	IPv4	71
AS131430	Bao Viet Commercial Joint Stock Bank	Unclassified	IPv4	61
AS153650	MEGAMAX VIET NAM TECHNOLOGY JOINT STOCK COMPANY	Unclassified	IPv4	60
AS153780	PAYX Payment Company Limited	Unclassified	IPv4	57
AS149142	Vina Securities Joint Stock Company	Unclassified	IPv4	38
AS131438	VIETNAM POST	Unclassified	IPv4	30
AS38734	ENCAPITAL FINANCIAL TECHNOLOGY JOINT STOCK COMPANY.	Unclassified	IPv4	25
AS55315	SSI Securities Incorporation	Unclassified	IPv4	17

All 11 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-16 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.23M 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.