AS3128

Summary

Country	United States
Organization	University of Wisconsin System
Domain	uwsys.net
Number of IPv4	656,896
Number of IPv6	1.2677× 1030
AS Type	Education
Registry	ARIN
Allocated	November 17, 1993 (about 32 years ago)
Updated	March 07, 2018 (about 7 years ago)

IP Ranges

AS3128 announces 13 IPv4 ranges and 1 IPv6 range.

That's a total of 656,896 IPv4 addresses and 1.2677× 10³⁰ IPv6 addresses.

Prefix	Organization	Size	Registry	Status
131.210.0.0/16	University of Wisconsin-parkside	65,536	ARIN	ALLOCATION
137.81.0.0/16	University of Wisconsin-superior	65,536	ARIN	ALLOCATION
137.104.0.0/16	University of Wisconsin - Platteville	65,536	ARIN	ALLOCATION
138.49.0.0/16	University of Wisconsin-la Crosse	65,536	ARIN	ALLOCATION
138.49.160.0/22	University of Wisconsin-la Crosse	1,024	ARIN	ALLOCATION
139.225.0.0/16	University of Wisconsin - River Falls	65,536	ARIN	ALLOCATION
141.233.0.0/16	University of Wisconsin Oshkosh	65,536	ARIN	ALLOCATION
143.200.0.0/16	University of Wisconsin - Green Bay	65,536	ARIN	ALLOCATION
143.235.0.0/16	University of Wisconsin System Administration	65,536	ARIN	ALLOCATION
143.236.0.0/16	University of Wisconsin-stevens Point	65,536	ARIN	ALLOCATION
144.13.0.0/16	University of Wisconsin - Stout	65,536	ARIN	ALLOCATION
146.151.3.0/24	University of Wisconsin Madison	256	ARIN	ALLOCATION
192.35.81.0/24	University of Wisconsin-parkside	256	ARIN	ALLOCATION

Prefix	Organization	Size	Registry	Status
2600:1d00::/28	University of Wisconsin System	1.2677× 1030	ARIN	ALLOCATION

Peers

AS3128 actively fosters the following peering relationships that enhance network performance through direct, settlement-free traffic exchange. Even with a modest number of peers, each connection serves as a strategic asset—optimizing routing, reducing latency, and minimizing transit costs.

Upstreams

AS3128 connects to the global Internet via at least 6 upstream providers. In this setup, AS3128 acts as a customer, subscribing to these transit services to obtain full BGP routing information and ensure reliable, redundant access to external networks.

Downstreams

AS3128 serves as a transit provider the following ASes, delivering the BGP routes needed for global connectivity. This downstream relationship underscores AS3128's role in extending Internet access beyond its own infrastructure.