AS21070

UPSTREAMS4

ASN	DESCRIPTION	IPv4	IPv6	OBSERVATIONS
AS8220	COLT Technology Services Group Limited	✓	✗	82
AS3356	Level 3 Parent, LLC	✓	✗	25
AS4637	Telstra Global	✓	✗	25
AS31367	Zayo Infrastructure France SA	✓	✗	3

The figures come from the routing tables our peers give us. This number is seen from 5 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 10 hours ago.