ASN AS23427 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS23427?

AS23427 is listed under Glenbard HSD.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS23427 Glenbard HSD | IPGeolocation.io

ASN Lookup Tool

Glenbard HSD glenbard.org

US 1 Routes

AS Data

AS23427

AS23427 – Glenbard HSD

AS Number	23427
AS Name	GLENBARD-HSD87
Organization	Glenbard HSD(glenb-3)
Country	US
Website	glenbard.org
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	GOVERNMENT
Registry	ARIN
Date Allocated	2009-11-12

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Use ASN data for AS23427 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
204.145.108.0/22	AS23427	Glenbard HSD	Glenbard HSD	1024

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:       23427
ASName:         GLENBARD-HSD87
ASHandle:       AS23427
RegDate:        2009-11-12
Updated:        2012-02-24
Comment:        DHAME1-ARIN    
Ref:            https://rdap.arin.net/registry/autnum/23427


OrgName:        Glenbard HSD #87
OrgId:          GLENB-3
Address:        596 Crescent Blvd
City:           Glen Ellyn
StateProv:      IL
PostalCode:     60137
Country:        US
RegDate:        2009-11-04
Updated:        2009-11-05
Ref:            https://rdap.arin.net/registry/entity/GLENB-3

ReferralServer:  rwhois://rwhois.illinois.net:4321

OrgTechHandle: DHAME1-ARIN
OrgTechName:   Dhamers, Nate 
OrgTechPhone:  +1-630-942-7686 
OrgTechEmail:  Nate_Dhamers@glenbard.org
OrgTechRef:    https://rdap.arin.net/registry/entity/DHAME1-ARIN

OrgNOCHandle: DHAME1-ARIN
OrgNOCName:   Dhamers, Nate 
OrgNOCPhone:  +1-630-942-7686 
OrgNOCEmail:  Nate_Dhamers@glenbard.org
OrgNOCRef:    https://rdap.arin.net/registry/entity/DHAME1-ARIN

OrgAbuseHandle: DHAME1-ARIN
OrgAbuseName:   Dhamers, Nate 
OrgAbusePhone:  +1-630-942-7686 
OrgAbuseEmail:  Nate_Dhamers@glenbard.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/DHAME1-ARIN

RNOCHandle: DHAME1-ARIN
RNOCName:   Dhamers, Nate 
RNOCPhone:  +1-630-942-7686 
RNOCEmail:  Nate_Dhamers@glenbard.org
RNOCRef:    https://rdap.arin.net/registry/entity/DHAME1-ARIN

RTechHandle: DHAME1-ARIN
RTechName:   Dhamers, Nate 
RTechPhone:  +1-630-942-7686 
RTechEmail:  Nate_Dhamers@glenbard.org
RTechRef:    https://rdap.arin.net/registry/entity/DHAME1-ARIN

RAbuseHandle: DHAME1-ARIN
RAbuseName:   Dhamers, Nate 
RAbusePhone:  +1-630-942-7686 
RAbuseEmail:  Nate_Dhamers@glenbard.org
RAbuseRef:    https://rdap.arin.net/registry/entity/DHAME1-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
AS6325	Illinois Century Network	US

Upstreams

AS Number	Description	Country
AS6325	Illinois Century Network	US