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 Universities of Wisconsin campuses.

UW-Madison IP ranges

UW-Madison IP list updated: September 2024

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 (FYI only – these are a subset from ranges listed above)

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)

Contact the Library Technology Group with any questions.


Other Universities of Wisconsin Campuses

IPs below reviewed and updated in September 2024

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

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.*.*

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.*.*