This article explains UChicago IP address ranges.

Devices on the University of Chicago network are assigned hostnames in the “uchicago.edu” domain and IP addresses in any of the following ranges:

128.135.0.0/16 – addresses between 128.135.0.0 and 128.135.255.255

205.208.0.0/17 – addresses between 205.208.0.0 and 205.208.127.255

10.0.0.0/8 – addresses between 10.0.0.0 and 10.255.255.255

Any address in these ranges should be recognized as belonging to the University of Chicago community and granted access or privileges accordingly. Other private IP address space as specified by RFC1918 is not carried by the campus network except by arrangement with Data Networking. To avoid conflicting use of this space, we request you inform us if you make use of such IP space. Data Networking can be reached through email to noc@uchicago.edu.

As a point of information, the University of Chicago Hospitals and Clinics assign hostnames in the “uchospitals.edu” domain and IP addresses of

165.68.0.0/16 – addresses from 165.68.0.0 through 165.68.255.255

64.107.48.0/23 – addresses from 64.107.48.0 through 64.107.49.255