AS51439

UPSTREAMS4

ASN	DESCRIPTION	IPv4	IPv6	OBSERVATIONS
AS19551	Incapsula Inc	✓	✗	12
AS6461	Zayo Bandwidth	✓	✗	5
AS49572	Fujitsu Services Ltd.	✓	✗	3
AS3356	Level 3 Parent, LLC	✗	✓	2

The figures come from the routing tables our peers give us. This number is seen from 6 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 4 hours ago.