AS21666

Name: AS21666 — OSF Healthcare System
Creator: ipdex

OSF Healthcare System Unknown registered in United States

4IPv4 prefixes

0IPv6 prefixes

50%RPKI-valid

#21,031AS Rank

327/327RIS visibility

#6,069Rank in United States

2022-08-30Allocated

OSF Healthcare System (AS21666) — Unknown, registered in United States. announces 4 IPv4 prefixes + 0 IPv6 prefixes. Rank in United States: #6069. Allocated: 2022-08-30.

IPv4 4IPv6 0

Announced prefixes · 4

v4 198.246.176.0/24 valid
v4 204.238.189.0/24 valid
v4 38.131.231.0/24 unknown
v4 38.65.207.0/24 unknown

RPKI: rpki.cloudflare.com · 2026-06-17

Routing: 4 IPv4 · 0 IPv6 announced · RIS visibility 327/327 RIS peers · RIPEstat · 2026-06-17

Prefix history

Announced prefixes Source: ipdex daily snapshot · sparse rows, value holds until the next change (steps)

Data table

Day	Announced prefixes
2026-06-12	4
2026-06-13	4

AS topology · Customer cone 1

Providers · 2

AS174 Cogent Communications, LLC
AS6461 Zayo Bandwidth

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