AS46286 Cook County

• IPv4 Prefixes

Country	Announced Prefix	Description	Valid ROA	Parent Prefix	RIR
	12.218.238.0/23	American Registry for Internet Numbers		12.0.0.0/8	ARIN
	66.99.240.0/23	Illinois Century Network		66.99.0.0/16	ARIN
	162.217.184.0/22	Cook County		162.217.184.0/22	ARIN
	162.217.184.0/24	Cook County		162.217.184.0/22	ARIN
	162.217.185.0/24	Cook County		162.217.184.0/22	ARIN
	162.217.186.0/24	Cook County		160.131.0.0/16	ARIN
	162.217.187.0/24	Cook County		162.217.184.0/22	ARIN

• IPv4 Peers

Country	ASN	Name	Description
	AS7018	ATT-INTERNET4	AT&T Enterprises, LLC
	AS6325	ILLINOIS-CENTURY	Illinois Century Network
	AS15042	URBN	Urban Communications, Inc.

• IPv4 Upstreams

Country	ASN	Name	Description
	AS6325	ILLINOIS-CENTURY	Illinois Century Network
	AS15042	URBN	Urban Communications, Inc.
	AS7018	ATT-INTERNET4	AT&T Enterprises, LLC

IPv4 Upstream Graph

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IPv4 Upstream Graph

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#
# 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/
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# Copyright 1997-2025, American Registry for Internet Numbers, Ltd.
#


ASNumber:       46286
ASName:         COOK-COUNTY
ASHandle:       AS46286
RegDate:        2008-08-01
Updated:        2008-08-01    
Ref:            https://rdap.arin.net/registry/autnum/46286


OrgName:        Cook County
OrgId:          COOKC-2
Address:        118 N Clark Street
City:           Chicago
StateProv:      IL
PostalCode:     60602
Country:        US
RegDate:        2008-05-23
Updated:        2016-04-21
Ref:            https://rdap.arin.net/registry/entity/COOKC-2


OrgNOCHandle: NCCAD1-ARIN
OrgNOCName:   NCC Admin
OrgNOCPhone:  +1-312-603-9002 
OrgNOCEmail:  NCC@cookcountyil.gov
OrgNOCRef:    https://rdap.arin.net/registry/entity/NCCAD1-ARIN

OrgTechHandle: NCCAD1-ARIN
OrgTechName:   NCC Admin
OrgTechPhone:  +1-312-603-9002 
OrgTechEmail:  NCC@cookcountyil.gov
OrgTechRef:    https://rdap.arin.net/registry/entity/NCCAD1-ARIN

OrgAbuseHandle: NCCAD1-ARIN
OrgAbuseName:   NCC Admin
OrgAbusePhone:  +1-312-603-9002 
OrgAbuseEmail:  NCC@cookcountyil.gov
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NCCAD1-ARIN

RTechHandle: NCC29-ARIN
RTechName:   Network Control Center
RTechPhone:  +1-312-603-0087 
RTechEmail:  ddonelson@cookcountygov.com
RTechRef:    https://rdap.arin.net/registry/entity/NCC29-ARIN

RNOCHandle: NCC29-ARIN
RNOCName:   Network Control Center
RNOCPhone:  +1-312-603-0087 
RNOCEmail:  ddonelson@cookcountygov.com
RNOCRef:    https://rdap.arin.net/registry/entity/NCC29-ARIN

RAbuseHandle: NCC29-ARIN
RAbuseName:   Network Control Center
RAbusePhone:  +1-312-603-0087 
RAbuseEmail:  ddonelson@cookcountygov.com
RAbuseRef:    https://rdap.arin.net/registry/entity/NCC29-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 1997-2025, American Registry for Internet Numbers, Ltd.
#