Observed topology

AS7668 HTCN - Hokuriku Telecommunication Network Co.

Unclassified APNIC NSP

Upstreams 10 carry this network

Downstreams 5 this network carries

Adjacent (IPv4) 14

Adjacent (IPv6) 6

Upstream graph Who carries AS7668, and who carries them, drawn as a map up to the transit-free core. 5 exchanges Where AS7668 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS7668: 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
AS2497	Internet Initiative Japan Inc.	Unclassified	IPv4 IPv6	254
AS2516	KDDI CORPORATION	Mobile	IPv4 IPv6	87
AS6939	Hurricane Electric LLC	Transit	IPv4	77
AS2519	ARTERIA Networks Corporation	Unclassified	IPv4	67
AS17676	SoftBank Corp.	Mobile	IPv4 IPv6	31
AS17534	NSK Co.,Ltd.	Unclassified	IPv4	10
AS24482	SG.GS	Hosting	IPv4 IPv6	10
AS17639	Converge ICT Solutions Inc.	Unclassified	IPv4	8
AS20485	Joint Stock Company TransTeleCom	Unclassified	IPv4	8
AS15412	Flag Telecom UK Limited	Unclassified	IPv6	1

Transit

Downstream networks

inferred

Networks for which AS7668 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS4711	INTEC Inc.	Unclassified	IPv4	96
AS17932	Japan Advanced Institute of Science and Technology	Unclassified	IPv4	57
AS18123	INAOKI EDUCATIONAL INSTITUTION	Unclassified	IPv4 IPv6	39
AS24260	Board of trusty: Kinjo-Gakuen	Unclassified	IPv4	11
AS24264	Kanazawa Institute of Technology	Unclassified	IPv4	4

Adjacency

Adjacent networks

All 15

Every AS seen directly next to AS7668 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS2497	Internet Initiative Japan Inc.	Unclassified	IPv4 IPv6	340
AS2516	KDDI CORPORATION	Mobile	IPv4 IPv6	122
AS2519	ARTERIA Networks Corporation	Unclassified	IPv4	116
AS4711	INTEC Inc.	Unclassified	IPv4	96
AS6939	Hurricane Electric LLC	Transit	IPv4	86
AS17932	Japan Advanced Institute of Science and Technology	Unclassified	IPv4	57
AS17676	SoftBank Corp.	Mobile	IPv4 IPv6	42
AS18123	INAOKI EDUCATIONAL INSTITUTION	Unclassified	IPv4 IPv6	39
AS17534	NSK Co.,Ltd.	Unclassified	IPv4	24
AS24260	Board of trusty: Kinjo-Gakuen	Unclassified	IPv4	11

All 15 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-08 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.00M 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.