AS3 — MIT-GATEWAYS

Network type: education

AS3 announces 32 IPv4 prefixes covering 1,836,287 addresses and 5 IPv6 prefixes.

About this network

One of the oldest allocations on the internet (MIT-GATEWAYS), serving the Massachusetts Institute of Technology in Cambridge, Massachusetts.

What it's used for

• Campus, research, and administrative networking for MIT.
• Historically the announcing ASN for the legacy 18.0.0.0/8 block — a full "Class A" (16.7M addresses) assigned to MIT in the early internet.

Notable

• In 2017 MIT announced it would sell about half of 18/8 (roughly 8 million IPv4 addresses) since it no longer needed them; a portion went to Amazon.
• A single-digit AS number reflects how early MIT connected — these were handed out sequentially in the internet's first years.

Interesting

• MIT's early networking work (and its stewardship of a whole /8) makes AS3 a frequent landmark when people explore the very bottom of the ASN space.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 18.0.0.0/15
• 18.3.0.0/16
• 18.4.0.0/14
• 18.8.0.0/13
• 18.16.0.0/15
• 18.18.0.0/16
• 18.22.0.0/15
• 18.25.0.0/16
• 18.26.0.0/15
• 18.29.0.0/16
• 18.31.0.0/16
• 128.30.0.0/16
• 128.31.0.0/27
• 128.31.0.32/30
• 128.31.0.36/31
• 128.31.0.38/32
• 128.31.0.40/29
• 128.31.0.48/28
• 128.31.0.64/26
• 128.31.0.128/25
• 128.31.1.0/24
• 128.31.2.0/23
• 128.31.4.0/22
• 128.31.8.0/21
• 128.31.16.0/20
• 128.31.32.0/19
• 128.31.64.0/18
• 128.31.128.0/17
• 128.52.0.0/16
• 192.52.61.0/24
• 192.52.62.0/23
• 192.52.64.0/23
• 2603:4000::/31
• 2603:4007::/32
• 2603:4008::/30
• 2603:4010::/31
• 2804:35c8::/32

Upstream networks

• AS3356 Level 3 Parent, LLC
• AS174 Cogent Communications, LLC
• AS6939 Hurricane Electric LLC
• AS11537 Internet2
• AS7015 Comcast Cable Communications, LLC
• AS293 ESnet
• AS11164 Internet2
• AS266306 CENTRALNETT SERVICOS LTDA

Downstream networks

• AS22608 Public Utility District No. 1 of Okanogan County
• AS54755 Desert Winds Wireless Inc

Adjacent networks

• AS3356 Level 3 Parent, LLC
• AS174 Cogent Communications, LLC
• AS6939 Hurricane Electric LLC
• AS11537 Internet2
• AS7015 Comcast Cable Communications, LLC
• AS293 ESnet
• AS11164 Internet2
• AS266306 CENTRALNETT SERVICOS LTDA
• AS16713 Northwest Open Access Network
• AS27373 Douglas County PUD
• AS22608 Public Utility District No. 1 of Okanogan County
• AS54755 Desert Winds Wireless Inc

Internet exchanges

• Massachusetts Internet Exchange — Boston, United States