Autonomous System

AS264 SRI International

BusinessActiveUnited StatesARIN

AS264 (SRINET-AS) is a business network operated by SRI International in United States, registered with ARIN. It has 36 IPv4 prefixes with 74,752 addresses, which makes it the 2,827th largest of 82,283 active autonomous systems by IPv4 space.

IPv4 addresses74,752in 36 prefixes
IPv6 prefixes0none
Size rank#2,827of 82,283 active ASNs
Abuser scoreVery Lowunder 0.01% of its addresses flagged · method

Details

OrganizationSRI International
AS nameSRINET-AS
Websitesri.com
Country United States (US)
Network typeBusiness
RegistryARIN
Abuse contactmark.favis@sri.com
Registered1989-01-23
Last updated2025-12-01

IPv4 prefixes

36 prefixes · 74,752 addresses
NetworkAddressesFirst – last address
128.18.0.0/1665,536128.18.0.0 – 128.18.255.255
128.57.128.0/23512128.57.128.0 – 128.57.129.255
128.57.47.0/24256128.57.47.0 – 128.57.47.255
128.57.50.0/24256128.57.50.0 – 128.57.50.255
128.57.60.0/24256128.57.60.0 – 128.57.60.255
128.57.61.0/24256128.57.61.0 – 128.57.61.255
128.57.62.0/24256128.57.62.0 – 128.57.62.255
128.57.89.0/24256128.57.89.0 – 128.57.89.255
128.57.92.0/24256128.57.92.0 – 128.57.92.255
128.57.93.0/24256128.57.93.0 – 128.57.93.255
128.57.208.0/24256128.57.208.0 – 128.57.208.255
128.57.209.0/24256128.57.209.0 – 128.57.209.255
128.57.216.0/24256128.57.216.0 – 128.57.216.255
128.57.217.0/24256128.57.217.0 – 128.57.217.255
192.5.38.0/24256192.5.38.0 – 192.5.38.255
192.5.67.0/24256192.5.67.0 – 192.5.67.255
192.5.92.0/24256192.5.92.0 – 192.5.92.255
192.5.93.0/24256192.5.93.0 – 192.5.93.255
192.12.5.0/24256192.12.5.0 – 192.12.5.255
192.12.16.0/24256192.12.16.0 – 192.12.16.255
192.12.33.0/24256192.12.33.0 – 192.12.33.255
192.12.197.0/24256192.12.197.0 – 192.12.197.255
192.12.198.0/24256192.12.198.0 – 192.12.198.255
192.12.199.0/24256192.12.199.0 – 192.12.199.255
192.12.200.0/24256192.12.200.0 – 192.12.200.255
The 25 largest of 36. The API and the database have all of them.

IPv6 prefixes

No IPv6 prefixes.

Query AS264 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=AS264&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS264, with or without a key:

curl "https://api.ipapi.is/?q=128.18.0.1"

Largest networks in United States

AS749 United States Department of Defense (DoD)227,398,912 IPv4 addressesAS16509 Amazon.com, Inc.218,475,264 IPv4 addressesAS7018 AT&T Enterprises, LLC117,261,568 IPv4 addressesAS8075 Microsoft Corporation81,463,040 IPv4 addressesAS721 United States Department of Defense (DoD)72,987,904 IPv4 addressesAS7922 Comcast Cable Communications, LLC68,337,152 IPv4 addresses