All ASNs

Autonomous System details for AS721

AS721
United States Department of Defense (DoD) • mail.mil

AS721 — United States Department of Defense (DoD)

AS Name
DNIC-ASBLK-00721-00726
Country
United States (US)
Website
Number of IPv4
73,135,616
Number of IPv6
1.58 × 1029
ASN type
Government
Status
Assigned
Registry
ARIN
Allocated
Last updated
September 12, 2025

IP Ranges

242 IPv4 prefixes, 2 IPv6 prefixes
Prefix Company Number of IPs
6.16.172.0/23 Headquarters, USAISC 512
6.16.174.0/24 Headquarters, USAISC 256
6.64.181.0/24 Headquarters, USAISC 256
55.0.0.0/8 Headquarters, USAISC 16,777,216
130.22.0.0/16 DoD Network Information Center 65,536
131.4.0.0/15 Air Force Systems Networking 131,072
131.16.0.0/16 Air Force Systems Networking 65,536
131.32.0.0/11 Air Force Systems Networking 2,097,152
131.64.0.0/13 DoD Network Information Center 524,288
131.73.0.0/16 DoD Network Information Center 65,536
131.74.0.0/15 DoD Network Information Center 131,072
131.76.0.0/14 DoD Network Information Center 262,144
131.78.3.0/24 DoD Network Information Center 256
131.78.204.0/24 DoD Network Information Center 256
131.80.0.0/14 DoD Network Information Center 262,144
131.86.0.0/15 DoD Network Information Center 131,072
131.86.0.0/16 DoD Network Information Center 65,536
131.87.0.0/16 DoD Network Information Center 65,536
132.0.0.0/10 Air Force Systems Networking 4,194,304
132.80.0.0/12 Headquarters, USAISC 1,048,576
132.96.0.0/11 Headquarters, USAISC 2,097,152
132.128.0.0/12 Headquarters, USAISC 1,048,576
134.80.0.0/16 Headquarters, USAISC 65,536
134.135.0.0/16 DoD Network Information Center 65,536
134.233.0.0/16 Headquarters, USAISC 65,536
134.235.0.0/16 Headquarters, USAISC 65,536
136.212.0.0/14 DoD Network Information Center 262,144
136.216.0.0/14 Headquarters, USAISC 262,144
136.220.0.0/15 Headquarters, USAISC 131,072
137.0.0.0/13 Air Force Systems Networking 524,288
137.8.0.0/14 DoD Network Information Center 262,144
137.209.0.0/16 DoD Network Information Center 65,536
137.240.0.0/14 Air Force Systems Networking 262,144
138.50.0.0/16 Headquarters, USAISC 65,536
138.136.0.0/13 DoD Network Information Center 524,288
138.144.0.0/12 DoD Network Information Center 1,048,576
138.160.0.0/15 DoD Network Information Center 131,072
138.162.5.0/24 Navy Network Information Center (NNIC) 256
138.164.0.0/14 DoD Network Information Center 262,144
138.168.0.0/14 MARINE CORPS CYBERSPACE OPERATIONS GROUP 262,144
138.178.0.0/15 Navy Network Information Center (NNIC) 131,072
138.178.0.0/16 Navy Network Information Center (NNIC) 65,536
138.180.0.0/16 Navy Network Information Center (NNIC) 65,536
139.139.0.0/16 Headquarters, USAISC 65,536
139.241.0.0/16 DoD Network Information Center 65,536
139.244.1.0/24 DoD Network Information Center 256
139.244.2.0/24 DoD Network Information Center 256
139.244.4.0/24 DoD Network Information Center 256
139.244.7.0/24 DoD Network Information Center 256
140.1.0.0/16 DoD Network Information Center 65,536
140.13.73.0/24 DoD Network Information Center 256
140.14.35.0/24 DoD Network Information Center 256
140.14.37.0/24 DoD Network Information Center 256
140.14.39.0/24 DoD Network Information Center 256
140.14.41.0/24 DoD Network Information Center 256
140.14.43.0/24 DoD Network Information Center 256
140.14.45.0/24 DoD Network Information Center 256
140.14.47.0/24 DoD Network Information Center 256
140.14.49.0/24 DoD Network Information Center 256
140.14.51.0/24 DoD Network Information Center 256
140.14.53.0/24 DoD Network Information Center 256
140.21.0.0/16 DoD Network Information Center 65,536
140.35.64.0/18 DoD Network Information Center 16,384
140.152.0.0/14 DoD Network Information Center 262,144
140.153.72.0/24 Headquarters, USAISC 256
140.201.0.0/16 Headquarters, USAISC 65,536
141.234.0.0/15 DoD Network Information Center 131,072
143.69.0.0/16 Headquarters, USAISC 65,536
143.73.0.0/16 Headquarters, USAISC 65,536
143.74.0.0/16 Headquarters, USAISC 65,536
143.76.0.0/16 Headquarters, USAISC 65,536
143.81.0.0/16 Headquarters, USAISC 65,536
143.81.0.0/17 Headquarters, USAISC 32,768
143.81.103.0/24 Headquarters, USAISC 256
143.81.128.0/17 Headquarters, USAISC 32,768
143.83.0.0/16 Headquarters, USAISC 65,536
143.84.0.0/16 Headquarters, USAISC 65,536
143.85.0.0/16 Headquarters, USAISC 65,536
143.85.0.0/18 Headquarters, USAISC 16,384
143.85.64.0/18 Headquarters, USAISC 16,384
143.85.128.0/18 Headquarters, USAISC 16,384
143.85.192.0/18 Headquarters, USAISC 16,384
143.86.176.0/24 Headquarters, USAISC 256
143.86.204.0/23 Headquarters, USAISC 512
143.138.0.0/15 Headquarters, USAISC 131,072
143.140.0.0/14 Air Force Systems Networking 262,144
143.144.0.0/13 Air Force Systems Networking 524,288
143.156.0.0/15 Air Force Systems Networking 131,072
143.212.0.0/15 Headquarters, USAISC 131,072
144.100.0.0/14 Headquarters, USAISC 262,144
144.104.0.0/14 Headquarters, USAISC 262,144
144.104.0.0/15 Headquarters, USAISC 131,072
144.109.0.0/16 Headquarters, USAISC 65,536
144.170.0.0/16 Headquarters, USAISC 65,536
144.182.0.0/15 DoD Network Information Center 131,072
144.251.43.0/24 DoD Network Information Center 256
146.55.22.0/23 Headquarters, USAISC 512
146.55.124.0/24 Headquarters, USAISC 256
146.55.127.0/24 Headquarters, USAISC 256
147.130.0.0/15 Headquarters, USAISC 131,072
2608:120::/32 United States Department of Defense (DoD) 7.92 × 1028
2608:121::/32 United States Department of Defense (DoD) 7.92 × 1028

This table only shows the first 100 of the set of IPv4 and IPv6 prefixes. All data is available via our IP data API.

IP ranges are the different blocks of IP addresses advertised by an Autonomous System (AS). These ranges can be used by the same organization operating the AS, or by different organizations.

Peers of AS721

0 peers

AS721 has no peers recorded.

Peering is a direct, often free, traffic exchange between Autonomous Systems (ASNs). They share routes only to their own networks and customers, making connections faster and cheaper for that specific traffic, without providing full internet access to each other.

Upstreams of AS721

1 upstreams
AS3356

AS721 uses these Autonomous Systems as its upstreams.

An upstream (or transit provider) is another AS that AS721 pays for full internet connectivity, allowing it to reach all global destinations and be reachable by them.

Downstreams of AS721

3 downstreams
AS27064 AS27065 AS27066

AS721 provides internet connectivity to these downstream Autonomous Systems.

A downstream is a customer Autonomous System that pays another AS (its provider) for internet access. The provider AS carries the downstream's traffic and makes its network reachable.

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