LIVE
5 ASNS PEERINGIPv4 1.079.308 PREFIXESIPv6 242.084 PREFIXESRPKI 1.003.849 VRPS17 PROBES ONLINELAST UPDATE JUST NOW
TREN
Rasat
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RASAT / AS

AS21666

OSF Healthcare System
4 announcements2 upstreams2 peers
TIER 1OSF Healthcare SystemOSF-ASN-01AS21666Cogent Communications, LLCCOGENT-174AS174Zayo BandwidthZAYO-6461AS6461
UPSTREAMS2
ASNDESCRIPTIONIPv4IPv6OBSERVATIONS
AS174Cogent Communications, LLC✓✗12
AS6461Zayo Bandwidth✓✗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 2 hours ago.