AS17035

UPSTREAMS17

ASN	DESCRIPTION	IPv4	IPv6	OBSERVATIONS
AS3257	GTT Communications Inc.	✓	✗	45
AS3356	Level 3 Parent, LLC	✓	✗	30
AS33661	Comcast Cable Communications, LLC	✓	✗	16
AS7922	Comcast Cable Communications, LLC	✓	✗	9
AS701	Verizon Business	✓	✗	8
AS8220	COLT Technology Services Group Limited	✓	✗	8
AS17060	NBCUniversal	✓	✗	8
AS20214	Comcast Cable Communications, LLC	✓	✗	7
AS46887	Crown Castle Fiber LLC	✓	✗	6
AS702	Verizon Business	✓	✗	4
AS33287	Comcast Cable Communications, LLC	✓	✗	4
AS33491	Comcast Cable Communications, LLC	✓	✗	4
AS33651	Comcast Cable Communications, LLC	✓	✗	4
AS33657	Comcast Cable Communications, LLC	✓	✗	4
AS33662	Comcast Cable Communications, LLC	✓	✗	4
AS394437	PS Lightwave	✓	✗	4
AS7015	Comcast Cable Communications, LLC	✓	✗	3

The figures come from the routing tables our peers give us. This number is seen from 4 separate vantage points. A peer that shares an internet exchange with this network and carries only a small share of its paths is not counted as an upstream: a transit provider carries the whole table, an IX peer only its own announcements. Internet exchange data comes from PeeringDB. Figures are from a dump taken 3 hours ago.