Autonomous System

AS300 United States Department of Defense (DoD)

GovernmentActiveUnited StatesARIN

AS300 (DNIC-AS-00300) is a government network operated by United States Department of Defense (DoD) in United States, registered with ARIN. It has 35 IPv4 prefixes with 96,768 addresses and 1 IPv6 prefix, which makes it the 2,383rd largest of 82,141 active autonomous systems by IPv4 space.

IPv4 addresses96,768in 35 prefixes
IPv6 prefixes1≈ 1.2 × 10²⁴ addresses
Size rank#2,383of 82,141 active ASNs
Abuser scoreVery Lowunder 0.01% of its addresses flagged · method

Details

OrganizationUnited States Department of Defense (DoD)
AS nameDNIC-AS-00300
Websitedefense.gov
Country United States (US)
Network typeGovernment
RegistryARIN
Abuse contactdisa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
Registered1989-06-15
Last updated2025-09-12

IPv4 prefixes

35 prefixes · 96,768 addresses
NetworkAddressesFirst – last address
158.15.0.0/1665,536158.15.0.0 – 158.15.255.255
214.66.0.0/198,192214.66.0.0 – 214.66.31.255
214.23.48.0/204,096214.23.48.0 – 214.23.63.255
164.235.104.0/212,048164.235.104.0 – 164.235.111.255
214.23.0.0/212,048214.23.0.0 – 214.23.7.255
214.23.24.0/212,048214.23.24.0 – 214.23.31.255
214.23.64.0/212,048214.23.64.0 – 214.23.71.255
214.23.248.0/212,048214.23.248.0 – 214.23.255.255
160.137.132.0/221,024160.137.132.0 – 160.137.135.255
160.137.136.0/221,024160.137.136.0 – 160.137.139.255
199.252.0.0/23512199.252.0.0 – 199.252.1.255
156.112.74.0/24256156.112.74.0 – 156.112.74.255
156.112.75.0/24256156.112.75.0 – 156.112.75.255
156.112.76.0/24256156.112.76.0 – 156.112.76.255
156.112.78.0/24256156.112.78.0 – 156.112.78.255
156.112.134.0/24256156.112.134.0 – 156.112.134.255
156.112.171.0/24256156.112.171.0 – 156.112.171.255
158.15.226.0/24256158.15.226.0 – 158.15.226.255
160.137.96.0/24256160.137.96.0 – 160.137.96.255
160.137.102.0/24256160.137.102.0 – 160.137.102.255
199.211.153.0/24256199.211.153.0 – 199.211.153.255
204.222.212.0/24256204.222.212.0 – 204.222.212.255
209.22.250.0/24256209.22.250.0 – 209.22.250.255
214.3.158.0/24256214.3.158.0 – 214.3.158.255
214.3.159.0/24256214.3.159.0 – 214.3.159.255
The 25 largest of 35. The API and the database have all of them.

IPv6 prefixes

1 prefix
  • 2608:184::/48

Query AS300 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=AS300&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS300, with or without a key:

curl "https://api.ipapi.is/?q=158.15.0.1"

Other networks of United States Department of Defense (DoD)

6 of 108
AS749 United States Department of Defense (DoD)227,398,912 IPv4 addressesAS721 United States Department of Defense (DoD)72,922,368 IPv4 addressesAS56 United States Department of Defense (DoD)8,089,600 IPv4 addressesAS306 United States Department of Defense (DoD)4,666,880 IPv4 addressesAS668 United States Department of Defense (DoD)2,558,464 IPv4 addressesAS5972 United States Department of Defense (DoD)2,300,416 IPv4 addresses

Largest networks in United States

AS749 United States Department of Defense (DoD)227,398,912 IPv4 addressesAS16509 Amazon.com, Inc.217,931,264 IPv4 addressesAS7018 AT&T Enterprises, LLC117,261,568 IPv4 addressesAS8075 Microsoft Corporation81,468,160 IPv4 addressesAS721 United States Department of Defense (DoD)72,922,368 IPv4 addressesAS7922 Comcast Cable Communications, LLC68,336,896 IPv4 addresses