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AS33503 Medical College of Wisconsin

Q: Why is WHOIS data shown for an ASN?

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

ASN Lookup Tool

Medical College of Wisconsin mcw.edu

US 3 Routes

AS Data

AS33503

AS33503 – Medical College of Wisconsin

AS Number	33503
AS Name	MCW-1-AS
Organization	Medical College of Wisconsin(mcw-1)
Country	US
Website	mcw.edu
Number of IPv4 Routes	2
Number of IPv6 Routes	1
ASN type	EDUCATION
Registry	ARIN
Date Allocated	2005-01-05

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Use ASN data for AS33503 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
2620:10d::/44	AS33503	Medical College of Wisconsin	Medical College of Wisconsin	~19×10²⁴
141.106.0.0/16	AS33503	Medical College of Wisconsin	Medical College of Wisconsin	65536
141.106.69.0/24	AS33503	Medical College of Wisconsin	Medical College of Wisconsin	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:       33503
ASName:         MCW-1-AS
ASHandle:       AS33503
RegDate:        2005-01-05
Updated:        2012-03-20    
Ref:            https://rdap.arin.net/registry/autnum/33503


OrgName:        Medical College of Wisconsin
OrgId:          MCW-1
Address:        MIS Department - Information Services     8701 Watertown Plank Road
City:           Milwaukee
StateProv:      WI
PostalCode:     53226
Country:        US
RegDate:        1990-07-10
Updated:        2011-09-24
Ref:            https://rdap.arin.net/registry/entity/MCW-1


OrgAbuseHandle: MH4-ORG-ARIN
OrgAbuseName:   Medical College of Wisconsin Information Services
OrgAbusePhone:  +1-414-955-4357 
OrgAbuseEmail:  hostmaster@mcw.edu
OrgAbuseRef:    https://rdap.arin.net/registry/entity/MH4-ORG-ARIN

OrgTechHandle: MH4-ORG-ARIN
OrgTechName:   Medical College of Wisconsin Information Services
OrgTechPhone:  +1-414-955-4357 
OrgTechEmail:  hostmaster@mcw.edu
OrgTechRef:    https://rdap.arin.net/registry/entity/MH4-ORG-ARIN

RTechHandle: MH4-ORG-ARIN
RTechName:   Medical College of Wisconsin Information Services
RTechPhone:  +1-414-955-4357 
RTechEmail:  hostmaster@mcw.edu
RTechRef:    https://rdap.arin.net/registry/entity/MH4-ORG-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
AS2381	WiscNet	US

Upstreams

AS Number	Description	Country
AS2381	WiscNet	US

Frequently Asked Questions

What is ASN AS33503?

ASN AS33503 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS33503?

AS33503 is listed under Medical College of Wisconsin.

What do peers, upstreams, and downstreams mean?

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 included here?

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

How can I access full ASN table data?

This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.