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Q: What are MIT's IP ranges?

What IP addresses might you see at MIT ?

Answer

This article collects information from multiple sources and presents it on a single page as a convenience, but could be out of date or missing information.

The ranges in the following table were compiled from a variety of locations, including ARIN data and an MIT Libraries page.

Range CIDR Notation ARIN Info Organizational Entity
18.0.0.0 - 18.31.255.255 18.0.0.0/11
MIT-2 Most of campus.
Also see: Standard Building Subnets
128.30.0.0 - 128.31.255.255 128.30.0.0/15 MIT-2 128.30.0.0/16: Official CSAIL research activities (offices and servers in 32 and OC40)
128.31.0.0/16: Guest (i.e., non-CSAIL) activities hosted on the CSAIL network (in 32 and OC40)
128.31.4.0/22: Laboratory for Information and Decision Systems
128.31.16.0/24: EECS lounge and classroom in 32 basement
128.52.0.0 - 128.52.255.255 128.52.0.0/16 MIT-2 CSAIL and non-CSAIL virtual machines in CSAIL's OpenStack cloud
129.55.0.0 - 129.55.255.255 129.55.0.0/16 MIT Lincoln Laboratory, Lexington, MA
192.52.61.0 - 192.52.66.255 See note 2 below MIT-7 Haystack Observatory, Tyngsboro, MA
198.125.160.0 - 198.125.163.255 198.125.160.0/22 MITNS ESnet* range used by LNS (Lab for Nuclear Science).
198.125.176.0 - 198.125.191.255 198.125.176.0/20 PSFC-1 ESnet* range used by Plasma Science Fusion Center, on campus
2603:4000:: - 2603:40ff:ffff:ffff:ffff:ffff:ffff:ffff 2603:4000::/24 MIT-2 Most of campus as/when IPv6 is rolled out.

*ESnet (Energy Sciences Network) is used by universities, research labs, national labs, etc.

Note 1: There are two separate ranges: 128.30.0.0/16 and 128.31.0.0/16.
Note 2: Haystack's IP range is actually 6 consecutive /24s. That is, 192.52.61.0/24, 192.52.62.0/24, 192.52.63.0/24, etc.

Woods Hole

Woods Hole Oceanographic Institution ("WHOI") has a long affiliation with MIT, and in some cases, their machines count as "on campus" (e.g. for access to outgoing-legacy.mit.edu), whereas in other cases they don't (access to some MIT Libraries digital resources). Users at Woods Hole who are unable to access certain digital resources on campus should try using the Remote Access VPN or contacting the administrators of that resource.

Woods Hole has the IP address range 128.128.0.0/16 (128.128.x.x http://whois.arin.net/rest/net/NET-128-128-0-0-1)

VPN Pools

  • 18.30.n.x
    • 18.30.128.0/17- Prisma Access (GlobalProtect) Cloud VPN
  • 18.28.n.x
    • 18.28.128.0/17- Prisma Access (GlobalProtect) Cloud VPN

Note: IP addresses assigned to devices connected to the Prisma Access Cloud VPN will be NAT'd to a Prisma Access IP address when communicating out to sites on the Internet. No NAT is applied when connecting to destinations on MITnet.

WiFi Ranges

  • 18.20.0.0/16 [MIT SECURE]
  • 18.21.0.0/16 [MIT]
  • 10.189.0.0/17 --NAT--> 192.54.222.0/24 [MIT GUEST] (Devices are assigned a 10.189.x.x IP and then NAT'd to 192.54.222.x when communicating out to sites on the Internet or to destinations on MITnet)

Note: As part of the WiFi Replacement Project, IP address ranges in completed buildings will be as follows:

  • 10.29.0.0/16   --NAT--> 18.29.0.0/16 [MIT SECURE]
  • 10.31.0.0/16   --NAT--> 18.31.0.0/16 [MIT]
  • 10.189.0.0/17 --NAT--> 192.54.222.0/24 [MIT GUEST]

Campus Firewall NAT Pool

  • 18.10.0.0/16
  • 18.11.0.0/16

Community

Documentation and information provided by the MIT Community


Last Modified:

September 12, 2020

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  1. Jun 29, 2018

    is there away we can link this KB article http://kb.mit.edu/confluence/x/CIMwCQ here?

  2. Aug 06, 2019

    128.52.0.0/16 should in the the same row as 128.30.0.0/15. These networks are used as follows:

    • 128.30.0.0/16: Official CSAIL research activities (offices and servers in 32 and OC40)
    • 128.31.0.0/16: Guest (i.e., non-CSAIL) activities hosted on the CSAIL network (in 32 and OC40)
      • 128.31.4.0/22: Laboratory for Information and Decision Systems
      • 128.31.16.0/24: EECS lounge and classroom in 32 basement
    • 128.52.0.0/16: CSAIL and non-CSAIL virtual machines in CSAIL's OpenStack cloud
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