Observed topology

AS32537 XILINX - Xilinx Incorporated

Unclassified ARIN

Upstreams 11 carry this network

Downstreams 0 this network carries

Adjacent (IPv4) 11

Adjacent (IPv6) 0

Upstream graph Who carries AS32537, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS32537 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 11

Networks observed carrying traffic for AS32537: 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
AS13335	Cloudflare, Inc.	Hosting	IPv4	309
AS3257	GTT Communications Inc.	Transit	IPv4	154
AS8220	COLT Technology Services Group Limited	Hosting	IPv4	119
AS9498	BHARTI Airtel Ltd.	Mobile	IPv4	117
AS33651	Comcast Cable Communications, LLC	Unclassified	IPv4	105
AS393552	Longmont Power & Communications	Residential	IPv4	96
AS7018	AT&T Enterprises, LLC	Residential	IPv4	89
AS3356	Level 3 Parent, LLC	Transit	IPv4	65
AS4637	Telstra Global	Unclassified	IPv4	63
AS4755	TATA Communications formerly VSNL is Leading ISP	Hosting	IPv4	60

All 11 upstreams →

Transit

Downstream networks

inferred

Networks for which AS32537 was observed as the last hop before the origin, meaning it appears to provide them transit.

No downstream observed. This network does not appear to carry transit for anyone.

Adjacency

Adjacent networks

All 11

Every AS seen directly next to AS32537 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS13335	Cloudflare, Inc.	Hosting	IPv4	309
AS3257	GTT Communications Inc.	Transit	IPv4	154
AS8220	COLT Technology Services Group Limited	Hosting	IPv4	119
AS9498	BHARTI Airtel Ltd.	Mobile	IPv4	117
AS33651	Comcast Cable Communications, LLC	Unclassified	IPv4	105
AS393552	Longmont Power & Communications	Residential	IPv4	96
AS7018	AT&T Enterprises, LLC	Residential	IPv4	89
AS3356	Level 3 Parent, LLC	Transit	IPv4	65
AS4637	Telstra Global	Unclassified	IPv4	63
AS4755	TATA Communications formerly VSNL is Leading ISP	Hosting	IPv4	60

All 11 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-07 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 72.97M 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.