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UW Campuses IP Address Ranges

This page lists IP ranges for use by third parties to provide IP-based authentication to licensed E-Resources for UW-Madison and other University of Wisconsin System campuses.

UW-Madison IP ranges

Standard format

72.33.*.*
128.104.0-24.*
128.104.26-75.*
128.104.78-223.*
128.104.226-254.*
128.105.*.*
144.92.0-17.*
144.92.19-37.*
144.92.38.0-223
144.92.39-43.*
144.92.44.0-63
144.92.44.72-103
144.92.44.112-255
144.92.45-80.*
144.92.81.0-127
144.92.82-88.*
144.92.89.0-95
144.92.89.128-255
144.92.90-91.*
144.92.93-255.*
146.151.0-207.*
146.151.224-255.*
192.12.224.*
192.160.134.*
192.250.20-21.*
198.133.224-225.*

Alternative format (with start and end numbers)

72.33.0.0 – 72.33.255.255
128.104.0.0 – 128.104.24.255
128.104.26.0 – 128.104.75.255
128.104.78.0 – 128.104.223.255
128.104.226.0 – 128.104.254.255
128.105.0.0 – 128.105.255.255
144.92.0.0 – 144.92.17.255
144.92.19.0 – 144.92.37.255
144.92.38.0 – 144.92.38.223
144.92.39.0 – 144.92.43.255
144.92.44.0 – 144.92.44.63
144.92.44.72 – 144.92.44.103
144.92.44.112 – 144.92.44.255
144.92.45.0 – 144.92.80.255
144.92.81.0 – 144.92.81.127
144.92.82.0 – 144.92.88.255
144.92.89.0 – 144.92.89.95
144.92.89.128 – 144.92.89.255
144.92.90.0 – 144.92.91.255
144.92.93.0 – 144.92.255.255
146.151.0.0 – 146.151.207.255
146.151.224.0 – 146.151.255.255
192.12.224.0 – 192.12.224.255
192.160.134.0 – 192.160.134.255
192.250.20.0 – 192.250.21.255
198.133.224.0 – 198.133.225.255

UW-Madison EZproxy Server IPs

The IP addresses listed here are for UW-Madison’s EZproxy servers as well as a workstation located in the Library Technology Group Helpdesk office for non-proxied on-campus testing.  These IPs are included in the ranges listed above, and are only highlighted as an FYI. Updated 7/16/2021.

128.104.46.196 (EZproxy server)
128.104.46.197 (EZproxy server)
128.104.46.199 (EZproxy server)
128.104.46.200 (EZproxy server)
128.104.46.206 (EZproxy server)
128.104.46.207 (EZproxy server)
128.104.60.146 (LTG office machine for testing)

Other University of Wisconsin System Campuses

UW-Eau Claire (uwec.edu)
137.28.*.*
192.236.17.*

UW-Green Bay (uwgb.edu)
143.200.*.*

UW-La Crosse (uwlax.edu)
138.49.*.*

UW-Milwaukee (uwm.edu)
129.89.*.*

UW-Oshkosh (uwosh.edu)
141.233.*.*
143.235.152.0 – 143.235.167.255

UW-Parkside (uwp.edu)
131.210.*.*

UW-Platteville (uwplatt.edu)
137.104.*.*

UW-River Falls (uwrf.edu)
139.225.*.*

UW-Stevens Point (uwsp.edu)
143.236.*.*

UW-Stout (uwstout.edu)
144.13.*.*

UW-Superior (uwsuper.edu)
137.81.*.*

UW-Whitewater (uww.edu)
140.146.*.*