Observed topology

AS16504 GRANITE

Unclassified ARIN

Upstreams 6 carry this network

Downstreams 16 this network carries

Adjacent (IPv4) 22

Adjacent (IPv6) 3

Upstream graph Who carries AS16504, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS16504 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS16504: 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
AS3257	GTT Communications Inc.	Transit	IPv4 IPv6	6,722
AS174	Cogent Communications, LLC	Transit	IPv4 IPv6	4,846
AS3356	Level 3 Parent, LLC	Transit	IPv4	525
AS701	Verizon Business	Residential	IPv4	121
AS7018	AT&T Enterprises, LLC	Residential	IPv4	26
AS46887	Crown Castle Fiber LLC	Unclassified	IPv4	16

Transit

Downstream networks

All 16

Networks for which AS16504 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS11394	City of Richardson	Unclassified	IPv4	108
AS22379	Manifold Services Inc	Unclassified	IPv4 IPv6	66
AS15319	COSCO Shipping Lines (North America) Inc.	Unclassified	IPv4	59
AS18663	University of the Pacific	Unclassified	IPv4	59
AS32352	MCGRATH RENTCORP	Unclassified	IPv4	59
AS46605	MCGRATH RENTCORP	Unclassified	IPv4	59
AS398219	Inmar, Inc.	Unclassified	IPv4	59
AS773	Parsons Corporation	Unclassified	IPv4	58
AS46575	Washington Suburban Sanitary Commission	Unclassified	IPv4	58
AS23288	-Reserved AS-	Unclassified	IPv4	52

All 16 downstreams →

Adjacency

Adjacent networks

All 22

Every AS seen directly next to AS16504 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS3257	GTT Communications Inc.	Transit	IPv4 IPv6	7,295
AS174	Cogent Communications, LLC	Transit	IPv4 IPv6	5,117
AS3356	Level 3 Parent, LLC	Transit	IPv4	525
AS701	Verizon Business	Residential	IPv4	121
AS11394	City of Richardson	Unclassified	IPv4	108
AS22379	Manifold Services Inc	Unclassified	IPv4 IPv6	66
AS15319	COSCO Shipping Lines (North America) Inc.	Unclassified	IPv4	59
AS18663	University of the Pacific	Unclassified	IPv4	59
AS32352	MCGRATH RENTCORP	Unclassified	IPv4	59
AS46605	MCGRATH RENTCORP	Unclassified	IPv4	59

All 22 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-23 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.15M 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.