Autonomous System
AS366 United States Department of Defense (DoD)
GovernmentActiveUnited StatesARIN
AS366 (DNIC-ASBLK-00306-00371) is a government network operated by United States Department of Defense (DoD) in United States, registered with ARIN. It has 17 IPv4 prefixes with 72,192 addresses and 2 IPv6 prefixes, which makes it the 2,919th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses72,192in 17 prefixes
IPv6 prefixes2≈ 3.1 × 10²⁶ addresses
Size rank#2,919of 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
17 prefixes · 72,192 addresses| Network | Addresses | First – last address |
|---|---|---|
| 55.82.0.0/16 | 65,536 | 55.82.0.0 – 55.82.255.255 |
| 55.82.132.0/22 | 1,024 | 55.82.132.0 – 55.82.135.255 |
| 55.82.136.0/22 | 1,024 | 55.82.136.0 – 55.82.139.255 |
| 55.82.148.0/22 | 1,024 | 55.82.148.0 – 55.82.151.255 |
| 55.82.146.0/23 | 512 | 55.82.146.0 – 55.82.147.255 |
| 55.82.5.0/24 | 256 | 55.82.5.0 – 55.82.5.255 |
| 55.82.9.0/24 | 256 | 55.82.9.0 – 55.82.9.255 |
| 55.82.10.0/24 | 256 | 55.82.10.0 – 55.82.10.255 |
| 55.82.20.0/24 | 256 | 55.82.20.0 – 55.82.20.255 |
| 55.82.53.0/24 | 256 | 55.82.53.0 – 55.82.53.255 |
| 55.82.100.0/24 | 256 | 55.82.100.0 – 55.82.100.255 |
| 55.82.128.0/24 | 256 | 55.82.128.0 – 55.82.128.255 |
| 55.82.129.0/24 | 256 | 55.82.129.0 – 55.82.129.255 |
| 55.82.140.0/24 | 256 | 55.82.140.0 – 55.82.140.255 |
| 55.82.160.0/24 | 256 | 55.82.160.0 – 55.82.160.255 |
| 55.82.200.0/24 | 256 | 55.82.200.0 – 55.82.200.255 |
| 55.82.253.0/24 | 256 | 55.82.253.0 – 55.82.253.255 |
55.82.0.0/16 55.82.132.0/22 55.82.136.0/22 55.82.148.0/22 55.82.146.0/23 55.82.5.0/24 55.82.9.0/24 55.82.10.0/24 55.82.20.0/24 55.82.53.0/24 55.82.100.0/24 55.82.128.0/24 55.82.129.0/24 55.82.140.0/24 55.82.160.0/24 55.82.200.0/24 55.82.253.0/24
IPv6 prefixes
2 prefixes- 2608:10a:3600::/40
- 2001:480:280::/48
2608:10a:3600::/40 2001:480:280::/48
Query AS366 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=AS366&key=YOUR_API_KEY"Any address in its prefixes resolves to AS366, with or without a key:
curl "https://api.ipapi.is/?q=55.82.0.1"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
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