ASN AS12047 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS12047?

AS12047 is listed under Gundersen Lutheran Medical Center, Inc..

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.

AS12047 Gundersen Lutheran Medical Center, Inc.

ASN Lookup Tool

Gundersen Lutheran Medical Center, Inc. gundersenhealth.org

US 5 Routes

AS Data

AS12047

AS12047 – Gundersen Lutheran Medical Center, Inc.

AS Number	12047
AS Name	GUNDERSEN-LUTHERAN
Organization	Gundersen Lutheran Medical Center, Inc.(glmc-4)
Country	US
Website	gundersenhealth.org
Number of IPv4 Routes	5
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2007-01-03

ASN Intelligence API for production workflows

Use ASN data for AS12047 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
204.69.149.0/24	AS12047	Gundersen Lutheran Medical Center, Inc.	Gundersen Lutheran Medical Center, Inc.	256
204.69.145.0/24	AS12047	Gundersen Lutheran Medical Center, Inc.	Gundersen Lutheran Medical Center, Inc.	256
204.69.146.0/24	AS12047	Gundersen Lutheran Medical Center, Inc.	Gundersen Lutheran Medical Center, Inc.	256
204.69.147.0/24	AS12047	Gundersen Lutheran Medical Center, Inc.	Gundersen Lutheran Medical Center, Inc.	256
204.69.148.0/24	AS12047	Gundersen Lutheran Medical Center, Inc.	Gundersen Lutheran Medical Center, Inc.	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:       12047
ASName:         GUNDERSEN-LUTHERAN
ASHandle:       AS12047
RegDate:        2007-01-03
Updated:        2014-04-04    
Ref:            https://rdap.arin.net/registry/autnum/12047


OrgName:        Gundersen Lutheran Medical Center, Inc.
OrgId:          GLMC-4
Address:        1910 South Ave.
City:           LaCrosse
StateProv:      WI
PostalCode:     54601
Country:        US
RegDate:        2006-12-29
Updated:        2023-03-01
Ref:            https://rdap.arin.net/registry/entity/GLMC-4


OrgAbuseHandle: PATTE528-ARIN
OrgAbuseName:   Patterson, Troy 
OrgAbusePhone:  +1-608-775-3917 
OrgAbuseEmail:  trpatter@gundersenhealth.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/PATTE528-ARIN

OrgAbuseHandle: SCW4-ARIN
OrgAbuseName:   Wied, Scott C
OrgAbusePhone:  +1-608-775-4456 
OrgAbuseEmail:  scwied@gundersenhealth.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/SCW4-ARIN

OrgTechHandle: SCW4-ARIN
OrgTechName:   Wied, Scott C
OrgTechPhone:  +1-608-775-4456 
OrgTechEmail:  scwied@gundersenhealth.org
OrgTechRef:    https://rdap.arin.net/registry/entity/SCW4-ARIN

OrgTechHandle: PATTE528-ARIN
OrgTechName:   Patterson, Troy 
OrgTechPhone:  +1-608-775-3917 
OrgTechEmail:  trpatter@gundersenhealth.org
OrgTechRef:    https://rdap.arin.net/registry/entity/PATTE528-ARIN

RNOCHandle: SCW4-ARIN
RNOCName:   Wied, Scott C
RNOCPhone:  +1-608-775-4456 
RNOCEmail:  scwied@gundersenhealth.org
RNOCRef:    https://rdap.arin.net/registry/entity/SCW4-ARIN

RTechHandle: SCW4-ARIN
RTechName:   Wied, Scott C
RTechPhone:  +1-608-775-4456 
RTechEmail:  scwied@gundersenhealth.org
RTechRef:    https://rdap.arin.net/registry/entity/SCW4-ARIN

RAbuseHandle: SCW4-ARIN
RAbuseName:   Wied, Scott C
RAbusePhone:  +1-608-775-4456 
RAbuseEmail:  scwied@gundersenhealth.org
RAbuseRef:    https://rdap.arin.net/registry/entity/SCW4-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
AS40264	Charter Communications LLC	US
AS11796	Airstream Communications, LLC	US

Upstreams

AS Number	Description	Country
AS40264	Charter Communications LLC	US
AS11796	Airstream Communications, LLC	US