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article collects information from multiple sources and presents it on a single page as a convenience, but could be out of date or missing information.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

*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)

Remote Access VPN Address Pools

• 18.30.128.0/17
• 18.28.128.0/17
• 18.19.0.0/18 {when connected from MITnet}

Note: IP addresses assigned to devices that are connected to the Remote Access VPN from outside of MITnet (e.g. connected from a user's home network) will be NAT'd to a Prisma Access IP address (the IP of the VPN gateway) when communicating out to sites on the Internet. No NAT is applied when communicating with hosts/sites on MITnet.

Wi-Fi

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

Note: Devices connected to the Wi-Fi networks are assigned an IP address, which will be NAT'd to the target range when communicating out to sites on the Internet (or to destinations on the "MIT GUEST" Wi-Fi network). No NAT is applied when communicating with hosts/sites on MITnet.

Campus Firewall NAT Pool

• 18.10.0.0/16
• 18.11.0.0/16

Note: The campus firewall NAT pool applies to any device on the MITnet wired (not Wi-Fi) networks assigned a 10.x.x.x IP address. When those devices communicate out to sites on the Internet, the 10-net IP address will be NAT'd to an IP within the campus firewall NAT pool. No NAT is applied when communicating with hosts/sites on MITnet.