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Q: What are MIT's IP ranges?

What IP addresses might you see at MIT ?


This article collects information from multiple sources and presents it on a single page as a convenience, but could be out of date or missing information.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 -
MIT-2 Most of campus - MIT-2 CSAIL at Stata Center, on campus
128.52.*.* MIT-2 Artificial Intelligence Lab, on campus (largely unused as of 2012)
129.55.*.* MIT Lincoln Laboratory, Lexington, MA - See note 2 below MIT-7 Haystack Observatory, Tyngsboro, MA - MITNS ESnet* range used by LNS (Lab for Nuclear Science). - PSFC-1 ESnet* range used by Plasma Science Fusion Center, on campus

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

Note 1: There are two separate ranges: and
Note 2: Haystack's IP range is actually 6 consecutive /24s. That is,,,, 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, 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 VPN client or contacting the administrators of that resource.

Woods Hole has the IP address range 128.128.*.* (a/k/a,


The MIT GUEST wireless network is designed for use by visitors, alumni/ae and other people without formal MIT affiliation. Devices using the MIT GUEST wireless network are tunneled through an addresses translation gateway, with external addresses in the range ( - The MIT GUEST wireless network also blocks many ports.

This does NOT count as "on campus" for the most part. MIT Community members using MIT GUEST who need to use MIT resources should connect to MIT SECURE wireless


Documentation and information provided by the MIT Community

Last Modified:

June 27, 2018

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  1. Jun 29, 2018

    is there away we can link this KB article here?

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