ASN AS3128 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS3128?

AS3128 is listed under University of Wisconsin System.

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.

AS3128 University of Wisconsin System

ASN Lookup Tool

University of Wisconsin System wisc.edu

US 14 Routes

AS Data

AS3128

AS3128 – University of Wisconsin System

AS Number	3128
AS Name	BRUWS-AS3128
Organization	University of Wisconsin System(bruws)
Country	US
Website	wisc.edu
Number of IPv4 Routes	13
Number of IPv6 Routes	1
ASN type	EDUCATION
Registry	ARIN
Date Allocated	1993-11-17

ASN Intelligence API for production workflows

Use ASN data for AS3128 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
144.13.0.0/16	AS3128	University of Wisconsin System	University of Wisconsin Stout	65536
138.49.160.0/22	AS3128	University of Wisconsin System	University of Wisconsin La Crosse	1024
143.235.0.0/16	AS3128	University of Wisconsin System	University of Wisconsin System Administration	65536
143.236.0.0/16	AS3128	University of Wisconsin System	University of Wisconsin Stevens Point	65536
131.210.0.0/16	AS3128	University of Wisconsin System	University of Wisconsin Parkside	65536
192.35.81.0/24	AS3128	University of Wisconsin System	University of Wisconsin Parkside	256
143.200.0.0/16	AS3128	University of Wisconsin System	University of Wisconsin Green Bay	65536
137.104.0.0/16	AS3128	University of Wisconsin System	University of Wisconsin Platteville	65536
146.151.3.0/24	AS3128	University of Wisconsin System	University of Wisconsin Madison	256
138.49.0.0/16	AS3128	University of Wisconsin System	University of Wisconsin La Crosse	65536

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:       3128
ASName:         BRUWS-AS3128
ASHandle:       AS3128
RegDate:        1993-11-17
Updated:        2018-03-07    
Ref:            https://rdap.arin.net/registry/autnum/3128


OrgName:        University of Wisconsin System
OrgId:          BRUWS
Address:        1220 Linden Drive
City:           Madison
StateProv:      WI
PostalCode:     53705
Country:        US
RegDate:        2014-04-16
Updated:        2022-09-26
Ref:            https://rdap.arin.net/registry/entity/BRUWS


OrgAbuseHandle: NOC31830-ARIN
OrgAbuseName:   Network Operations Center
OrgAbusePhone:  +1-608-262-9030 
OrgAbuseEmail:  noc@uwsys.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NOC31830-ARIN

OrgDNSHandle: UWSNH-ARIN
OrgDNSName:   University of Wisconsin System Network Hostmaster
OrgDNSPhone:  +1-608-263-4188 
OrgDNSEmail:  hostmaster@uwsys.net
OrgDNSRef:    https://rdap.arin.net/registry/entity/UWSNH-ARIN

OrgNOCHandle: NOC31830-ARIN
OrgNOCName:   Network Operations Center
OrgNOCPhone:  +1-608-262-9030 
OrgNOCEmail:  noc@uwsys.net
OrgNOCRef:    https://rdap.arin.net/registry/entity/NOC31830-ARIN

OrgTechHandle: MHA260-ARIN
OrgTechName:   Hare, Michael 
OrgTechPhone:  +1-608-262-5236 
OrgTechEmail:  michael.hare@wisc.edu
OrgTechRef:    https://rdap.arin.net/registry/entity/MHA260-ARIN

OrgTechHandle: NOC31830-ARIN
OrgTechName:   Network Operations Center
OrgTechPhone:  +1-608-262-9030 
OrgTechEmail:  noc@uwsys.net
OrgTechRef:    https://rdap.arin.net/registry/entity/NOC31830-ARIN

OrgRoutingHandle: NOC31830-ARIN
OrgRoutingName:   Network Operations Center
OrgRoutingPhone:  +1-608-262-9030 
OrgRoutingEmail:  noc@uwsys.net
OrgRoutingRef:    https://rdap.arin.net/registry/entity/NOC31830-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
AS21738	Rozint	US
AS19184	University of Wisconsin Eau Claire	US
AS393577	Tritan Development	US
AS6939	Hurricane Electric LLC	US
AS46103	University of Wisconsin Whitewater	US
AS64289	Macarne.com	US
AS10242	US Internet Corp	US
AS32621	Twin City VoIP, Inc.	US
AS19782	Indiana University	US
AS7050	University of Wisconsin - Milwaukee	US

Upstreams

AS Number	Description	Country
AS2381	WiscNet	US
AS7018	AT&T Enterprises, LLC	US
AS11537	Internet2	US
AS1299	Arelion Sweden AB	SE
AS6939	Hurricane Electric LLC	US
AS11164	Internet2	US
AS64289	Macarne.com	US
AS32621	Twin City VoIP, Inc.	US

Downstreams

AS Number	Description	Country
AS7050	University of Wisconsin Milwaukee	US
AS19184	University of Wisconsin Eau Claire	US
AS46103	University of Wisconsin Whitewater	US
AS394049	University of Wisconsin Hospital and Clinics	US
AS47065	USC / UFMG PEERING Research Testbed	US
AS59	University of Wisconsin Madison	US