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If you are scraping this block for the prefixes that a AS originates, please use the data dumps in https://bgp.tools/kb/api and cache them

	Prefix	Description
	38.89.244.0/22	CIRBN, LLC
	64.150.64.0/24	Illinois Century Network
	76.78.250.0/24	BOLD-EUREKACOLLEGE
	107.152.0.0/20	CIRBN, LLC
	158.222.16.0/22	MR Systems Wireless, LLC
	158.222.20.0/24	MR Systems Wireless, LLC
	158.222.21.0/24	MR Systems Wireless, LLC
	158.222.22.0/24	MR Systems Wireless, LLC
	162.222.8.0/21	Gridley Communications
	199.38.32.0/20	CIRBN, LLC
	216.124.156.0/22	Illinois Century Network
	216.125.236.0/24	Illinois Century Network
	216.125.237.0/24	Illinois Century Network
	216.125.238.0/24	Illinois Century Network
	216.125.239.0/24	Illinois Century Network
	216.125.243.0/24	Illinois Century Network
	216.125.244.0/23	Illinois Century Network
	216.125.246.0/24	Illinois Century Network

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS174	Cogent Communications, LLC	✔	✘
	AS6939	Hurricane Electric LLC	✔	✘
	AS3257	GTT Communications Inc.	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS6939	Hurricane Electric LLC	✔	✘
	AS40121	MAXWIRE, INC.	✔	✘
	AS174	Cogent Communications, LLC	✔	✘
	AS399440	Heartland Fiber, Inc.	✔	✘
	AS3257	GTT Communications Inc.	✔	✘
	AS7386	Illinois State University	✔	✘
	AS40642	ILLINOIS WESLEYAN UNIVERSITY	✔	✘
	AS26875	Heartland Bank and Trust Company	✔	✘
	AS1420	STL OFFICE SOLUTIONS, INC.	✔	✘
	AS137409	GSL Networks Pty LTD	✔	✘
	AS11232	Midcontinent Communications	✔	✘
	AS49544	i3D.net B.V	✔	✘
	AS4826	Vocus Connect International Backbone	✔	✘
	AS32709	Joink, LLC	✔	✘
	AS8220	COLT	✔	✘
	AS62642	Bigleaf Networks, Inc.	✔	✘
	AS13335	Cloudflare, Inc.	✔	✘
	AS24482	SG.GS	✔	✘
	AS53597	Hoyos Consulting LLC	✔	✘
	AS36236	NetActuate, Inc	✔	✘
	AS199524	Gcore S.A.	✔	✘
	AS32590	Valve Corporation	✔	✘
	AS14907	Wikimedia Foundation Inc.	✔	✘
	AS10242	US Internet Corp	✔	✘
	AS293	ESnet	✔	✘
	AS396238	City of Fairlawn DBA FairlawnGig	✔	✘
	AS1239	Sprint Wireline (Cogent)	✔	✘
	AS8928	GTT Communications Inc.	✔	✘

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Downstreams

	ASN	Description	IPv4	IPv6
	AS40121	MAXWIRE, INC.	✔	✘
	AS399440	Heartland Fiber, Inc.	✔	✘
	AS7386	Illinois State University	✔	✘
	AS40642	ILLINOIS WESLEYAN UNIVERSITY	✔	✘
	AS26875	Heartland Bank and Trust Company	✔	✘
	AS1420	STL OFFICE SOLUTIONS, INC.	✔	✘

ASHandle:       AS62523
OrgID:          CL-214
ASName:         CIRBN-LLC
ASNumber:       62523
RegDate:        2013-06-21
Updated:        2013-06-21
Source:         ARIN



OrgID:          CL-214
OrgName:        CIRBN, LLC
CanAllocate:    
Street:         200 W Front Street
Street:         Suite 500A
City:           Bloomington
State/Prov:     IL
Country:        US
PostalCode:     61701
RegDate:        2013-04-08
Updated:        2022-01-04
OrgAdminHandle: CTS22-ARIN
OrgTechHandle:  CTS22-ARIN
OrgTechHandle:  DLB152-ARIN
OrgAbuseHandle: CAC86-ARIN
OrgAbuseHandle: DLB152-ARIN
OrgNOCHandle:   CTS22-ARIN
OrgNOCHandle:   DLB152-ARIN
OrgRoutingHandle:   CTS22-ARIN
OrgRoutingHandle:   DLB152-ARIN
OrgDNSHandle:   CTS22-ARIN
OrgDNSHandle:   DLB152-ARIN
Source:         ARIN





OrgAdminHandle:       CTS22-ARIN
OrgAdminName:          CIRBN Technical Staff
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        CTS22-ARIN
OrgTechName:           CIRBN Technical Staff
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        DLB152-ARIN
OrgTechName:          Derek Barker
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       CAC86-ARIN
OrgAbuseName:          CIRBN Abuse Contact
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       DLB152-ARIN
OrgAbuseName:         Derek Barker
# Email removed, Log into bgp.tools to see whois emails


OrgNOCHandle:         CTS22-ARIN
OrgNOCName:            CIRBN Technical Staff
# Email removed, Log into bgp.tools to see whois emails


OrgNOCHandle:         DLB152-ARIN
OrgNOCName:           Derek Barker
# Email removed, Log into bgp.tools to see whois emails


OrgRoutingHandle:     CTS22-ARIN
OrgRoutingName:        CIRBN Technical Staff
# Email removed, Log into bgp.tools to see whois emails


OrgRoutingHandle:     DLB152-ARIN
OrgRoutingName:       Derek Barker
# Email removed, Log into bgp.tools to see whois emails


OrgDNSHandle:         CTS22-ARIN
OrgDNSName:            CIRBN Technical Staff
# Email removed, Log into bgp.tools to see whois emails


OrgDNSHandle:         DLB152-ARIN
OrgDNSName:           Derek Barker
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2026-02-09T03:27:26Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RADB	as-hurricane	24469
ARIN	as62523:as-cirbn	7
ALTDB	as-jarmtelco	649
ARIN	as-62523	7
RIPE	as-transroute-spec	19663
RIPE	as-gttcust	89887