Autonomous System

AS3 Massachusetts Institute of Technology

EducationActiveUnited StatesARIN

AS3 (MIT-GATEWAYS) is an education network operated by Massachusetts Institute of Technology in United States, registered with ARIN. It has 88 IPv4 prefixes with 1,850,624 addresses and 8 IPv6 prefixes, which makes it the 273rd largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses1,850,624in 88 prefixes
IPv6 prefixes8≈ 6.3 × 10²⁹ addresses
Size rank#273of 82,200 active ASNs
Abuser scoreVery Lowunder 0.01% of its addresses flagged · method

Details

OrganizationMassachusetts Institute of Technology
AS nameMIT-GATEWAYS
Websitemit.edu
Country United States (US)
Network typeEducation
RegistryARIN
Abuse contactarin-mit-security@mit.edu
Registered—
Last updated2025-12-02

IPv4 prefixes

88 prefixes · 1,850,624 addresses
NetworkAddressesFirst – last address
128.30.0.0/15131,072128.30.0.0 – 128.31.255.255
18.0.0.0/1665,53618.0.0.0 – 18.0.255.255
18.1.0.0/1665,53618.1.0.0 – 18.1.255.255
18.3.0.0/1665,53618.3.0.0 – 18.3.255.255
18.4.0.0/1665,53618.4.0.0 – 18.4.255.255
18.5.0.0/1665,53618.5.0.0 – 18.5.255.255
18.6.0.0/1665,53618.6.0.0 – 18.6.255.255
18.7.0.0/1665,53618.7.0.0 – 18.7.255.255
18.8.0.0/1665,53618.8.0.0 – 18.8.255.255
18.9.0.0/1665,53618.9.0.0 – 18.9.255.255
18.10.0.0/1665,53618.10.0.0 – 18.10.255.255
18.11.0.0/1665,53618.11.0.0 – 18.11.255.255
18.12.0.0/1665,53618.12.0.0 – 18.12.255.255
18.13.0.0/1665,53618.13.0.0 – 18.13.255.255
18.14.0.0/1665,53618.14.0.0 – 18.14.255.255
18.15.0.0/1665,53618.15.0.0 – 18.15.255.255
18.16.0.0/1665,53618.16.0.0 – 18.16.255.255
18.17.0.0/1665,53618.17.0.0 – 18.17.255.255
18.18.0.0/1665,53618.18.0.0 – 18.18.255.255
18.22.0.0/1665,53618.22.0.0 – 18.22.255.255
18.23.0.0/1665,53618.23.0.0 – 18.23.255.255
18.25.0.0/1665,53618.25.0.0 – 18.25.255.255
18.26.0.0/1665,53618.26.0.0 – 18.26.255.255
18.27.0.0/1665,53618.27.0.0 – 18.27.255.255
18.29.0.0/1665,53618.29.0.0 – 18.29.255.255
The 25 largest of 88. The API and the database have all of them.

IPv6 prefixes

8 prefixes
  • 2603:4000::/32
  • 2603:4001::/32
  • 2603:4007::/32
  • 2603:4008::/32
  • 2603:4009::/32
  • 2603:400a::/32
  • 2603:4010::/32
  • 2603:4011::/32

Query AS3 with the API

The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day. 

curl "https://api.ipapi.is/?q=AS3&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS3, with or without a key:

curl "https://api.ipapi.is/?q=128.30.0.1"

Other networks of Massachusetts Institute of Technology

AS63 Massachusetts Institute of Technology67,840 IPv4 addresses

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