Autonomous System

AS306 United States Department of Defense (DoD)

GovernmentActiveUnited StatesARIN

AS306 (DNIC-ASBLK-00306-00371) is a government network operated by United States Department of Defense (DoD) in United States, registered with ARIN. It has 275 IPv4 prefixes with 4,666,880 addresses and 55 IPv6 prefixes, which makes it the 137th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses4,666,880in 275 prefixes
IPv6 prefixes55≈ 6.8 × 10²⁶ addresses
Size rank#137of 82,200 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

275 prefixes · 4,666,880 addresses
NetworkAddressesFirst – last address
55.10.0.0/1665,53655.10.0.0 – 55.10.255.255
55.15.0.0/1665,53655.15.0.0 – 55.15.255.255
55.17.0.0/1665,53655.17.0.0 – 55.17.255.255
55.38.0.0/1665,53655.38.0.0 – 55.38.255.255
55.44.0.0/1665,53655.44.0.0 – 55.44.255.255
55.51.0.0/1665,53655.51.0.0 – 55.51.255.255
55.61.0.0/1665,53655.61.0.0 – 55.61.255.255
55.68.0.0/1665,53655.68.0.0 – 55.68.255.255
55.85.0.0/1665,53655.85.0.0 – 55.85.255.255
55.194.0.0/1665,53655.194.0.0 – 55.194.255.255
132.79.0.0/1665,536132.79.0.0 – 132.79.255.255
132.80.0.0/1665,536132.80.0.0 – 132.80.255.255
132.81.0.0/1665,536132.81.0.0 – 132.81.255.255
132.82.0.0/1665,536132.82.0.0 – 132.82.255.255
132.83.0.0/1665,536132.83.0.0 – 132.83.255.255
132.84.0.0/1665,536132.84.0.0 – 132.84.255.255
132.85.0.0/1665,536132.85.0.0 – 132.85.255.255
132.86.0.0/1665,536132.86.0.0 – 132.86.255.255
132.87.0.0/1665,536132.87.0.0 – 132.87.255.255
132.88.0.0/1665,536132.88.0.0 – 132.88.255.255
132.89.0.0/1665,536132.89.0.0 – 132.89.255.255
132.90.0.0/1665,536132.90.0.0 – 132.90.255.255
132.91.0.0/1665,536132.91.0.0 – 132.91.255.255
132.92.0.0/1665,536132.92.0.0 – 132.92.255.255
132.93.0.0/1665,536132.93.0.0 – 132.93.255.255
The 25 largest of 275. The API and the database have all of them.

IPv6 prefixes

55 prefixes
  • 2608:10b:3800::/40
  • 2608:16a:7100::/40
  • 2608:10a:7311::/48
  • 2608:10a:7320::/48
  • 2608:10a:7321::/48
  • 2608:10a:7322::/48
  • 2608:10a:7336::/48
  • 2608:10a:7347::/48
  • 2608:10a:7356::/48
  • 2608:10a:7360::/48
  • 2608:12a:7413::/48
  • 2608:12a:7415::/48
  • 2608:12a:7425::/48
  • 2608:12a:7426::/48
  • 2608:12a:7435::/48
  • 2608:12a:7437::/48
  • 2608:12a:7441::/48
  • 2608:12a:7444::/48
  • 2608:12a:7446::/48
  • 2608:12a:7453::/48
  • 2608:12a:7455::/48
  • 2608:14a:7516::/48
  • 2608:14a:7517::/48
  • 2608:14a:7523::/48
  • 2608:14a:7524::/48
The 25 largest of 55. The API and the database have all of them.

Query AS306 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=AS306&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS306, with or without a key:

curl "https://api.ipapi.is/?q=55.10.0.1"

Other networks of United States Department of Defense (DoD)

6 of 108
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