LIVE
5 ASNS PEERINGIPv4 1.078.466 PREFIXESIPv6 242.008 PREFIXESRPKI 1.003.418 VRPS16 PROBES ONLINELAST UPDATE JUST NOW
TREN
Rasat
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RASAT / AS

AS19580

A.R.T. Advisors, LLC
9 announcements2 upstreams2 peers
TIER 1A.R.T. Advisors, LLCART-LLCAS19580Cogent Communications, LLCCOGENT-174AS174Level 3 Parent, LLCLEVEL3AS3356
UPSTREAMS2
ASNDESCRIPTIONIPv4IPv6OBSERVATIONS
AS3356Level 3 Parent, LLC✓✗32
AS174Cogent Communications, LLC✓✗4

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.