ASN Lookup Tool

OSF Healthcare System osfhealthcare.org US US 4 Routes

AS Data

AS21666

AS21666 – OSF Healthcare System

AS Number 21666
AS Name OSF-ASN-01
Organization OSF Healthcare System(ohs-2)
Country US
Website osfhealthcare.org
Number of IPv4 Routes 4
Number of IPv6 Routes 0
ASN type BUSINESS
Registry ARIN
Date Allocated 2022-08-30

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Use ASN data for AS21666 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route # IPs
38.65.207.0/24 256
198.246.176.0/24 256
38.131.231.0/24 256
204.238.189.0/24 256

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       21666
ASName:         OSF-ASN-01
ASHandle:       AS21666
RegDate:        2022-08-30
Updated:        2022-08-30    
Ref:            https://rdap.arin.net/registry/autnum/21666


OrgName:        OSF Healthcare System
OrgId:          OHS-2
Address:        124 SW Adams St
City:           Peoria
StateProv:      IL
PostalCode:     61602
Country:        US
RegDate:        1995-05-26
Updated:        2022-12-09
Ref:            https://rdap.arin.net/registry/entity/OHS-2


OrgTechHandle: NETWO5372-ARIN
OrgTechName:   Network Administration
OrgTechPhone:  +1-309-655-2000 
OrgTechEmail:  dnsadmin@osfhealthcare.org
OrgTechRef:    https://rdap.arin.net/registry/entity/NETWO5372-ARIN

OrgAbuseHandle: NETWO5372-ARIN
OrgAbuseName:   Network Administration
OrgAbusePhone:  +1-309-655-2000 
OrgAbuseEmail:  dnsadmin@osfhealthcare.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NETWO5372-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

Peers

AS Number Description Country
AS1239 Cogent Communications, LLC US
AS6461 Zayo Bandwidth US
AS174 Cogent Communications, LLC US

Upstreams

AS Number Description Country
AS6461 Zayo Bandwidth US
AS174 Cogent Communications, LLC US

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Frequently Asked Questions

ASN AS21666 is an Autonomous System Number used to identify a network for BGP internet routing.
AS21666 is listed under OSF Healthcare System.
Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.
Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.
WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.
This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.