University of Wisconsin System operates AS3128: 11 IPv4 prefixes covering 655,616 addresses, most of them in 
United States.
By IPv4 addresses the network ranks #464 worldwide and #129 of 18,202 networks in United States. That is 0.04% of the country’s IPv4 space.
The largest block is 143.235.0.0 to 143.236.255.255 with 131,072 addresses, geolocated to Madison.
- IPv4 addresses
- 655,616
- IPv4 prefixes
- 11
- World rank
- #464
- Country share
- 0.04%
- IPv6 ranges
- 1
Addresses by country
- United States 100%
Largest blocks
- 143.235.0.0 Madison131,072
- 144.13.0.0 Menomonie65,536
- 143.200.0.0 Green Bay65,536
- 141.233.0.0 Oshkosh65,536
- 139.225.0.0 River Falls65,536
- 138.49.0.0 La Crosse (Goosetown-Campus)65,536
- 137.104.0.0 Platteville65,536
- 137.81.0.0 Superior65,536
Networks of similar size
- AS17813 Mahanagar Telephone Nigam Limited
659,968 - AS31822 City University of New York659,712
- AS22516 Charter Communications656,896
- AS4193 State of Washington655,872
- AS20845 DIGI Tavkozlesi es Szolgaltato Kft.
652,288 - AS14080 Telmex Colombia S.A.
638,720 - AS14962 NCR Corporation637,440
- AS12252 America Movil Peru S.A.C.
634,624
IPv4 prefixes
Questions and answers
Who owns AS3128?
Autonomous system AS3128 is operated by University of Wisconsin System.
How many IP addresses does AS3128 have?
The network holds 655,616 IPv4 addresses in 11 prefixes, plus 1 IPv6 ranges.
Which country is AS3128 in?
The main country is United States.
How big is AS3128?
By IPv4 addresses it ranks #464 worldwide.
What is the largest address block of AS3128?
143.235.0.0 to 143.236.255.255, 131,072 addresses.