Autonomous System

AS668 United States Department of Defense (DoD)

GovernmentActiveUnited StatesARIN

AS668 (DNIC-AS-00668) is a government network operated by United States Department of Defense (DoD) in United States, registered with ARIN. It has 188 IPv4 prefixes with 2,552,064 addresses and 1 IPv6 prefix, which makes it the 215th largest of 82,612 active autonomous systems by IPv4 space.

IPv4 addresses2,552,064in 188 prefixes
IPv6 prefixes1≈ 7.9 × 10²⁸ addresses
Size rank#215of 82,612 active ASNs
Abuser scoreVery Lowunder 0.01% of its addresses flagged · method

Details

OrganizationUnited States Department of Defense (DoD)
AS nameDNIC-AS-00668
Websitedefense.gov
Country United States (US)
Network typeGovernment
RegistryARIN
Abuse contactdisa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
Registered1990-04-24
Last updated2025-09-12

IPv4 prefixes

188 prefixes · 2,552,064 addresses
NetworkAddressesFirst – last address
6.4.0.0/1665,5366.4.0.0 – 6.4.255.255
128.132.0.0/1665,536128.132.0.0 – 128.132.255.255
129.92.0.0/1665,536129.92.0.0 – 129.92.255.255
129.229.0.0/1665,536129.229.0.0 – 129.229.255.255
130.109.0.0/1665,536130.109.0.0 – 130.109.255.255
130.163.0.0/1665,536130.163.0.0 – 130.163.255.255
131.120.0.0/1665,536131.120.0.0 – 131.120.255.255
131.121.0.0/1665,536131.121.0.0 – 131.121.255.255
131.122.0.0/1665,536131.122.0.0 – 131.122.255.255
131.214.0.0/1665,536131.214.0.0 – 131.214.255.255
131.218.0.0/1665,536131.218.0.0 – 131.218.255.255
132.45.0.0/1665,536132.45.0.0 – 132.45.255.255
132.193.0.0/1665,536132.193.0.0 – 132.193.255.255
137.128.0.0/1665,536137.128.0.0 – 137.128.255.255
140.5.0.0/1665,536140.5.0.0 – 140.5.255.255
140.6.0.0/1665,536140.6.0.0 – 140.6.255.255
140.25.0.0/1665,536140.25.0.0 – 140.25.255.255
140.31.0.0/1665,536140.31.0.0 – 140.31.255.255
140.32.0.0/1665,536140.32.0.0 – 140.32.255.255
140.178.0.0/1665,536140.178.0.0 – 140.178.255.255
143.56.0.0/1665,536143.56.0.0 – 143.56.255.255
144.3.0.0/1665,536144.3.0.0 – 144.3.255.255
147.227.0.0/1665,536147.227.0.0 – 147.227.255.255
150.125.0.0/1665,536150.125.0.0 – 150.125.255.255
155.141.0.0/1665,536155.141.0.0 – 155.141.255.255
The 25 largest of 188. The API and the database have all of them.

IPv6 prefixes

1 prefix
  • 2001:480::/32

Query AS668 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=AS668&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS668, with or without a key:

curl "https://api.ipapi.is/?q=6.4.0.1"

Other networks of United States Department of Defense (DoD)

6 of 110
AS749 United States Department of Defense (DoD)227,398,400 IPv4 addressesAS721 United States Department of Defense (DoD)72,988,416 IPv4 addressesAS56 United States Department of Defense (DoD)8,089,856 IPv4 addressesAS306 United States Department of Defense (DoD)4,666,880 IPv4 addressesAS5972 United States Department of Defense (DoD)2,302,464 IPv4 addressesAS27064 United States Department of Defense (DoD)1,963,776 IPv4 addresses

Largest networks in United States

AS749 United States Department of Defense (DoD)227,398,400 IPv4 addressesAS16509 Amazon.com, Inc.218,481,664 IPv4 addressesAS7018 AT&T Enterprises, LLC117,261,056 IPv4 addressesAS8075 Microsoft Corporation81,467,904 IPv4 addressesAS721 United States Department of Defense (DoD)72,988,416 IPv4 addressesAS7922 Comcast Cable Communications, LLC68,337,664 IPv4 addresses