Networking, Guide to University of Illinois IP Spaces

For IT Pros: This page contains information about IP address ranges used by the University of Illinois.

IP ranges that host systems and/or provide services for the Urbana campus

If you are a system or network administrator who wishes to allow access to a system from any UIUCnet computer, please consider all three of the following groups of IP ranges, which collectively identify systems that belong to the Urbana-Champaign campus, University-wide shared services, and NCSA:

Urbana-Champaign campus

University-wide shared services

Many services shared by the entire University, including payroll, Banner, Exchange, and Lync, use these IP ranges.

  • 2620:79:8000::/48


Other University of Illinois IP ranges

The following IP ranges are used for other University of Illinois campuses and networks.

University of Illinois at Chicago

  • 2620:80:4000::/48

University of Illinois at Springfield



ICCN (the Intercampus Communications Network) carries information between all University of Illinois campuses and connects to other Big Ten universities.

  • (a suballocation of Urbana campus IP space)
  • 2620:0:e10::/48

Private IP Space

Private IP space is RFC 1918 compliant IP addresses that can be used by anyone, but may not be routed on the Internet. (IP addresses in this range cannot be properly resolved from off campus.) There are 3 address ranges allocated by RFC 1918:,, and

NOTE: The RFC1918 private IP ranges (Urbana) and (NCSA) are used for internal purposes only. Systems in these private IP ranges can only reach (and be reached by) other computers within the IP ranges for Urbana-Champaign campus, University shared services, and NCSA.

Conventions for use of Private IP space

Departments wishing to use Private IP space on the UIUC campus are requested to follow these conventions:

  • For traffic that you want to use in your unit, that will never be leaving your unit's network, you are permitted to use any part of the address space. There is no need to let Technology Services know what part of this you are using. It is entirely up to your unit to set up anything needed to use this IP space. Technology Services will not host these addresses in campus DNS or route this IP space to campus. Routing between this IP space and your campus assigned IP space still falls under the regular guidelines (i.e. you can't without prior approval).

  • In general, the preferred option is to request a Private IP range from Technology Services. This IP range will be a subset of the address space, which can be routed to other parts of campus by Technology Services (if your unit would like) and managed in campus DNS. As with any other network, your unit can not route between it and other subnets (including your own) without prior approval.

  • Technology Services reserves the IP space for campus-wide projects, please do not use it in your department.

Urbana campus mobile and remote IP ranges

Specific IP ranges used by various services for connecting mobile and remote users can be found in accessnets.txt

IllinoisNet           Private:
IllinoisNet        Public NAT:
General Access Nets   Private:
IllinoisNet_Guest     Private:
IllinoisNet_Devices   Private:
Eduroam               Private:
Guest Access Nets  Public NAT:
vpn pool1:            
vpn pool2:            
vpn pool3:            
vpn duo pool1:        
vpn duo pool2:        

Keywords:campus IP ranges, NCSA, private IP space, mobile IP space, remote IP space, wireless   Doc ID:47572
Owner:IPAM I.Group:University of Illinois Technology Services
Created:2015-02-24 17:04 CDTUpdated:2017-06-16 13:28 CDT
Sites:University of Illinois Technology Services
Feedback:  14   0