Observed topology

AS15997 ITSA Intelligent Technologies S.A.

Residential RIPE

Upstreams 9 carry this network

Downstreams 9 this network carries

Adjacent (IPv4) 17

Adjacent (IPv6) 7

Upstream graph Who carries AS15997, and who carries them, drawn as a map up to the transit-free core. 3 exchanges Where AS15997 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS15997: 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
AS1299	Arelion Sweden AB	Transit	IPv4 IPv6	45
AS6939	Hurricane Electric LLC	Transit	IPv4 IPv6	38
AS3491	PCCW Global (HK) Ltd.	Transit	IPv4	36
AS12741	Netia SA	Residential	IPv4	33
AS174	Cogent Communications, LLC	Transit	IPv4 IPv6	31
AS3356	Level 3 Parent, LLC	Transit	IPv4 IPv6	20
AS24482	SG.GS	Hosting	IPv4 IPv6	4
AS29632	Netassist International EOOD	Unclassified	IPv6	1
AS201054	Stowarzyszenie e-Poludnie	Unclassified	IPv6	1

Transit

Downstream networks

inferred

Networks for which AS15997 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS203707	DIGITAL UTILITIES SP Z O O	Unclassified	IPv4	58
AS209769	Simplifae Poland S.A.	Unclassified	IPv4	58
AS47396	Mazowiecka Jednostka Wdrazania Programow Unijnych	Unclassified	IPv4	57
AS199887	Centrum Unijnych Projektow Transportowych	Unclassified	IPv4	54
AS15038	The Cambridge Incubator, LLC	Unclassified	IPv4	39
AS198289	KPMG sp. z o.o.	Unclassified	IPv4	39
AS51064	Glowny Inspektorat Transportu Drogowego	Unclassified	IPv4	30
AS198782	SERVICES ZONE S.A.	Unclassified	IPv4	5
AS197671	GTECH POLSKA Sp. z o.o.	Unclassified	IPv4	1

Adjacency

Adjacent networks

All 19

Every AS seen directly next to AS15997 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS1299	Arelion Sweden AB	Transit	IPv4 IPv6	144
AS3491	PCCW Global (HK) Ltd.	Transit	IPv4	113
AS174	Cogent Communications, LLC	Transit	IPv4 IPv6	93
AS6939	Hurricane Electric LLC	Transit	IPv4 IPv6	90
AS3356	Level 3 Parent, LLC	Transit	IPv4 IPv6	61
AS203707	DIGITAL UTILITIES SP Z O O	Unclassified	IPv4	58
AS209769	Simplifae Poland S.A.	Unclassified	IPv4	58
AS47396	Mazowiecka Jednostka Wdrazania Programow Unijnych	Unclassified	IPv4	57
AS199887	Centrum Unijnych Projektow Transportowych	Unclassified	IPv4	54
AS15038	The Cambridge Incubator, LLC	Unclassified	IPv4	39

All 19 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.