Autonomous System
AS370 United States Department of Defense (DoD)
GovernmentActiveUnited StatesARIN
AS370 (DNIC-ASBLK-00306-00371) is a government network operated by United States Department of Defense (DoD) in United States, registered with ARIN. It has 133 IPv4 prefixes with 297,728 addresses and 1 IPv6 prefix, which makes it the 959th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses297,728in 133 prefixes
IPv6 prefixes1≈ 3.1 × 10²⁶ addresses
Size rank#959of 82,200 active ASNs
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
133 prefixes · 297,728 addresses| Network | Addresses | First – last address |
|---|---|---|
| 55.54.0.0/16 | 65,536 | 55.54.0.0 – 55.54.255.255 |
| 55.79.0.0/16 | 65,536 | 55.79.0.0 – 55.79.255.255 |
| 55.93.0.0/16 | 65,536 | 55.93.0.0 – 55.93.255.255 |
| 55.100.0.0/16 | 65,536 | 55.100.0.0 – 55.100.255.255 |
| 139.244.72.0/21 | 2,048 | 139.244.72.0 – 139.244.79.255 |
| 55.93.128.0/22 | 1,024 | 55.93.128.0 – 55.93.131.255 |
| 55.54.204.0/24 | 256 | 55.54.204.0 – 55.54.204.255 |
| 55.54.205.0/24 | 256 | 55.54.205.0 – 55.54.205.255 |
| 55.54.210.0/24 | 256 | 55.54.210.0 – 55.54.210.255 |
| 55.54.211.0/24 | 256 | 55.54.211.0 – 55.54.211.255 |
| 55.54.212.0/24 | 256 | 55.54.212.0 – 55.54.212.255 |
| 55.54.215.0/24 | 256 | 55.54.215.0 – 55.54.215.255 |
| 55.54.216.0/24 | 256 | 55.54.216.0 – 55.54.216.255 |
| 55.54.217.0/24 | 256 | 55.54.217.0 – 55.54.217.255 |
| 55.54.218.0/24 | 256 | 55.54.218.0 – 55.54.218.255 |
| 55.54.220.0/24 | 256 | 55.54.220.0 – 55.54.220.255 |
| 55.54.222.0/24 | 256 | 55.54.222.0 – 55.54.222.255 |
| 55.54.223.0/24 | 256 | 55.54.223.0 – 55.54.223.255 |
| 55.54.225.0/24 | 256 | 55.54.225.0 – 55.54.225.255 |
| 55.54.226.0/24 | 256 | 55.54.226.0 – 55.54.226.255 |
| 55.54.227.0/24 | 256 | 55.54.227.0 – 55.54.227.255 |
| 55.54.228.0/24 | 256 | 55.54.228.0 – 55.54.228.255 |
| 55.54.229.0/24 | 256 | 55.54.229.0 – 55.54.229.255 |
| 55.54.230.0/24 | 256 | 55.54.230.0 – 55.54.230.255 |
| 55.54.232.0/24 | 256 | 55.54.232.0 – 55.54.232.255 |
55.54.0.0/16 55.79.0.0/16 55.93.0.0/16 55.100.0.0/16 139.244.72.0/21 55.93.128.0/22 55.54.204.0/24 55.54.205.0/24 55.54.210.0/24 55.54.211.0/24 55.54.212.0/24 55.54.215.0/24 55.54.216.0/24 55.54.217.0/24 55.54.218.0/24 55.54.220.0/24 55.54.222.0/24 55.54.223.0/24 55.54.225.0/24 55.54.226.0/24 55.54.227.0/24 55.54.228.0/24 55.54.229.0/24 55.54.230.0/24 55.54.232.0/24
The 25 largest of 133. The API and the database have all of them.
IPv6 prefixes
1 prefix- 2608:10a:6000::/40
2608:10a:6000::/40
Query AS370 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=AS370&key=YOUR_API_KEY"Any address in its prefixes resolves to AS370, with or without a key:
curl "https://api.ipapi.is/?q=55.54.0.1"Other networks of United States Department of Defense (DoD)
6 of 108AS749 United States Department of Defense (DoD)227,464,192 IPv4 addressesAS721 United States Department of Defense (DoD)73,070,080 IPv4 addressesAS56 United States Department of Defense (DoD)8,082,944 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)2,298,624 IPv4 addresses
Largest networks in United States
AS749 United States Department of Defense (DoD)227,464,192 IPv4 addressesAS16509 Amazon.com, Inc.218,038,784 IPv4 addressesAS7018 AT&T Enterprises, LLC117,262,080 IPv4 addressesAS8075 Microsoft Corporation81,463,040 IPv4 addressesAS721 United States Department of Defense (DoD)73,070,080 IPv4 addressesAS7922 Comcast Cable Communications, LLC68,336,896 IPv4 addresses