Autonomous System

AS368 United States Department of Defense (DoD)

GovernmentActiveUnited StatesARIN

AS368 (DNIC-ASBLK-00306-00371) is a government network operated by United States Department of Defense (DoD) in United States, registered with ARIN. It has 7 IPv4 prefixes with 133,888 addresses and 1 IPv6 prefix, which makes it the 1,783rd largest of 82,558 active autonomous systems by IPv4 space.

IPv4 addresses133,888in 7 prefixes
IPv6 prefixes1≈ 3.1 × 10²⁶ addresses
Size rank#1,783of 82,558 active ASNs
Abuser scoreVery Lowunder 0.01% of its addresses flagged · method

Details

OrganizationUnited States Department of Defense (DoD)
AS nameDNIC-ASBLK-00306-00371
Websitedefense.gov
Country United States (US)
Network typeGovernment
RegistryARIN
Abuse contactdisa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
Registered1989-06-30
Last updated2025-09-12

IPv4 prefixes

7 prefixes · 133,888 addresses
NetworkAddressesFirst – last address
55.42.0.0/1665,53655.42.0.0 – 55.42.255.255
55.87.0.0/1665,53655.87.0.0 – 55.87.255.255
55.42.96.0/221,02455.42.96.0 – 55.42.99.255
55.87.96.0/221,02455.87.96.0 – 55.87.99.255
55.87.100.0/2425655.87.100.0 – 55.87.100.255
55.87.101.0/2425655.87.101.0 – 55.87.101.255
55.87.255.0/2425655.87.255.0 – 55.87.255.255

IPv6 prefixes

1 prefix
  • 2608:10a:4700::/40

Query AS368 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=AS368&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS368, with or without a key:

curl "https://api.ipapi.is/?q=55.42.0.1"

Other networks of United States Department of Defense (DoD)

6 of 110
AS749 United States Department of Defense (DoD)227,398,656 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 addressesAS668 United States Department of Defense (DoD)2,552,064 IPv4 addressesAS5972 United States Department of Defense (DoD)2,302,464 IPv4 addresses

Largest networks in United States

AS749 United States Department of Defense (DoD)227,398,656 IPv4 addressesAS16509 Amazon.com, Inc.218,488,832 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