Observed topology

AS17035 NBCUNI-17035

Unclassified ARIN

Upstreams 18 carry this network

Downstreams 1 this network carries

Adjacent (IPv4) 19

Adjacent (IPv6) 0

Upstream graph Who carries AS17035, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS17035 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 18

Networks observed carrying traffic for AS17035: 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	563
AS3356	Level 3 Parent, LLC	Transit	IPv4	418
AS7922	Comcast Cable Communications, LLC	Residential	IPv4	228
AS46887	Crown Castle Fiber LLC	Unclassified	IPv4	180
AS8220	COLT Technology Services Group Limited	Hosting	IPv4	144
AS701	Verizon Business	Residential	IPv4	118
AS702	Verizon Business	Unclassified	IPv4	87
AS20214	Comcast Cable Communications, LLC	Unclassified	IPv4	79
AS33287	Comcast Cable Communications, LLC	Unclassified	IPv4	64
AS33651	Comcast Cable Communications, LLC	Unclassified	IPv4	63

All 18 upstreams →

Transit

Downstream networks

inferred

Networks for which AS17035 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS17060	NBCUniversal	Unclassified	IPv4	118

Adjacency

Adjacent networks

All 19

Every AS seen directly next to AS17035 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS3257	GTT Communications Inc.	Transit	IPv4	563
AS3356	Level 3 Parent, LLC	Transit	IPv4	418
AS7922	Comcast Cable Communications, LLC	Residential	IPv4	228
AS46887	Crown Castle Fiber LLC	Unclassified	IPv4	180
AS8220	COLT Technology Services Group Limited	Hosting	IPv4	144
AS17060	NBCUniversal	Unclassified	IPv4	122
AS33661	Comcast Cable Communications, LLC	Unclassified	IPv4	120
AS701	Verizon Business	Residential	IPv4	118
AS702	Verizon Business	Unclassified	IPv4	87
AS20214	Comcast Cable Communications, LLC	Unclassified	IPv4	79

All 19 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-22 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.12M 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.