AS3598

UPSTREAMS4

ASN	DESCRIPTION	IPv4	IPv6	OBSERVATIONS
AS8075	Microsoft Corporation	✓	✓	50
AS3356	Level 3 Parent, LLC	✓	✗	20
AS1680	Cellcom Fixed Line Communication L.P	✓	✓	6
AS2686	AT&T Enterprises, LLC	✓	✓	6

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 5 hours ago.