Autonomous System details

AS721

United States Department of Defense (DoD)  ·  mail.mil

United States

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AS721 – United States Department of Defense (DoD)

Field Value
Country United States
Website mail.mil
Hosted domains 369
IPv4 addresses 72,101,120
IPv6 addresses 158,456,325,028,528,675,187,087,900,672
ASN type Government
Registry arin
Allocated 56 years ago on Jan 01, 1970
Updated 4 months ago on Sep 12, 2025

IP Ranges

Netblock Company Num of IPs
55.0.0.0/8 Headquarters, USAISC 16,777,216
214.0.0.0/8 DoD Network Information Center 16,777,216
215.0.0.0/9 DoD Network Information Center 8,388,608
132.0.0.0/10 Air Force Systems Networking 4,194,304
131.32.0.0/11 Air Force Systems Networking 2,097,152
132.96.0.0/11 Headquarters, USAISC 2,097,152
205.64.0.0/11 Navy Network Information Center (NNIC) 2,097,152
132.80.0.0/12 Headquarters, USAISC 1,048,576
132.128.0.0/12 Headquarters, USAISC 1,048,576
138.144.0.0/12 DoD Network Information Center 1,048,576
131.64.0.0/13 DoD Network Information Center 524,288
137.0.0.0/13 Air Force Systems Networking 524,288
138.136.0.0/13 DoD Network Information Center 524,288
143.144.0.0/13 Air Force Systems Networking 524,288
158.0.0.0/13 DoD Network Information Center 524,288
160.136.0.0/13 Headquarters, USAISC 524,288
160.144.0.0/13 Headquarters, USAISC 524,288
205.56.0.0/13 Navy Network Information Center (NNIC) 524,288
205.96.0.0/13 Navy Network Information Center (NNIC) 524,288
131.76.0.0/14 DoD Network Information Center 262,144
131.80.0.0/14 DoD Network Information Center 262,144
136.212.0.0/14 DoD Network Information Center 262,144
136.216.0.0/14 Headquarters, USAISC 262,144
137.8.0.0/14 DoD Network Information Center 262,144
137.240.0.0/14 Air Force Systems Networking 262,144
138.164.0.0/14 DoD Network Information Center 262,144
138.168.0.0/14 MARINE CORPS CYBERSPACE OPERATIONS GROUP 262,144
140.152.0.0/14 DoD Network Information Center 262,144
143.140.0.0/14 Air Force Systems Networking 262,144
144.100.0.0/14 Headquarters, USAISC 262,144
144.104.0.0/14 Headquarters, USAISC 262,144
153.24.0.0/14 Air Force Systems Networking 262,144
155.152.0.0/14 Headquarters, USAISC 262,144
155.216.0.0/14 Headquarters, USAISC 262,144
158.8.0.0/14 DoD Network Information Center 262,144
158.236.0.0/14 MARINE CORPS CYBERSPACE OPERATIONS GROUP 262,144
158.240.0.0/14 MARINE CORPS CYBERSPACE OPERATIONS GROUP 262,144
131.4.0.0/15 Air Force Systems Networking 131,072
131.74.0.0/15 DoD Network Information Center 131,072
131.86.0.0/15 DoD Network Information Center 131,072
136.220.0.0/15 Headquarters, USAISC 131,072
138.160.0.0/15 DoD Network Information Center 131,072
138.178.0.0/15 Navy Network Information Center (NNIC) 131,072
141.234.0.0/15 DoD Network Information Center 131,072
143.138.0.0/15 Headquarters, USAISC 131,072
143.156.0.0/15 Air Force Systems Networking 131,072
143.212.0.0/15 Headquarters, USAISC 131,072
144.104.0.0/15 Headquarters, USAISC 131,072
144.182.0.0/15 DoD Network Information Center 131,072
147.130.0.0/15 Headquarters, USAISC 131,072
147.216.0.0/15 Headquarters, USAISC 131,072
150.192.0.0/15 Headquarters, USAISC 131,072
153.24.0.0/15 Air Force Systems Networking 131,072
155.8.0.0/15 Headquarters, USAISC 131,072
155.150.0.0/15 Headquarters, USAISC 131,072
155.214.0.0/15 Headquarters, USAISC 131,072
158.14.0.0/15 Headquarters, USAISC 131,072
160.126.0.0/15 DoD Network Information Center 131,072
160.132.0.0/15 Headquarters, USAISC 131,072
164.230.0.0/15 DoD Network Information Center 131,072
198.218.0.0/15 Air Force Systems Networking 131,072
199.112.0.0/15 DoD Network Information Center 131,072
204.222.0.0/15 DoD Network Information Center 131,072
205.104.0.0/15 Navy Network Information Center (NNIC) 131,072
205.106.0.0/15 Navy Network Information Center (NNIC) 131,072
205.108.0.0/15 Navy Network Information Center (NNIC) 131,072
207.132.0.0/15 DoD Network Information Center 131,072
130.22.0.0/16 DoD Network Information Center 65,536
131.16.0.0/16 Air Force Systems Networking 65,536
131.73.0.0/16 DoD Network Information Center 65,536
131.86.0.0/16 DoD Network Information Center 65,536
131.87.0.0/16 DoD Network Information Center 65,536
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
137.209.0.0/16 DoD Network Information Center 65,536
138.50.0.0/16 Headquarters, USAISC 65,536
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
140.1.0.0/16 DoD Network Information Center 65,536
140.21.0.0/16 DoD Network Information Center 65,536
140.201.0.0/16 Headquarters, USAISC 65,536
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
143.83.0.0/16 Headquarters, USAISC 65,536
143.84.0.0/16 Headquarters, USAISC 65,536
143.85.0.0/16 Headquarters, USAISC 65,536
144.109.0.0/16 Headquarters, USAISC 65,536
144.170.0.0/16 Headquarters, USAISC 65,536
153.23.0.0/16 Air Force Systems Networking 65,536
153.26.0.0/16 Air Force Systems Networking 65,536
153.29.0.0/16 Air Force Systems Networking 65,536
155.7.0.0/16 DoD Network Information Center 65,536
155.155.0.0/16 Headquarters, USAISC 65,536
155.252.0.0/16 Navy Network Information Center (NNIC) 65,536
159.77.0.0/16 DoD Network Information Center 65,536
164.87.0.0/16 DoD Network Information Center 65,536
164.236.0.0/16 DoD Network Information Center 65,536
198.25.0.0/16 DoD Network Information Center 65,536
198.26.0.0/16 DoD Network Information Center 65,536
198.220.0.0/16 Air Force Systems Networking 65,536
199.57.0.0/16 DoD Network Information Center 65,536
199.208.0.0/16 DoD Network Information Center 65,536
199.209.0.0/16 DoD Network Information Center 65,536
199.251.0.0/16 DoD Network Information Center 65,536
204.34.0.0/16 DoD Network Information Center 65,536
204.208.0.0/16 Headquarters, USAISC 65,536
205.110.0.0/16 Navy Network Information Center (NNIC) 65,536
205.115.0.0/16 Navy Network Information Center (NNIC) 65,536
206.37.0.0/16 DoD Network Information Center 65,536
206.38.0.0/16 DoD Network Information Center 65,536
206.39.0.0/16 DoD Network Information Center 65,536
209.22.0.0/16 DoD Network Information Center 65,536
214.13.0.0/16 DoD Network Information Center 65,536
214.40.0.0/16 DoD Network Information Center 65,536
143.81.0.0/17 Headquarters, USAISC 32,768
143.81.128.0/17 Headquarters, USAISC 32,768
153.29.0.0/17 Air Force Systems Networking 32,768
153.29.128.0/17 Air Force Systems Networking 32,768
199.211.128.0/17 DoD Network Information Center 32,768
204.37.128.0/17 DoD Network Information Center 32,768
140.35.64.0/18 DoD Network Information Center 16,384
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
192.156.0.0/18 MARINE CORPS CYBERSPACE OPERATIONS GROUP 16,384
198.97.128.0/18 Headquarters, USAISC 16,384
198.250.128.0/18 DoD Network Information Center 16,384
198.250.192.0/18 DoD Network Information Center 16,384
199.9.64.0/18 DoD Network Information Center 16,384
199.32.128.0/18 DoD Network Information Center 16,384
199.211.64.0/18 DoD Network Information Center 16,384
199.211.192.0/18 DoD Network Information Center 16,384
199.252.128.0/18 DoD Network Information Center 16,384
215.65.0.0/18 DoD Network Information Center 16,384
155.21.192.0/19 Headquarters, USAISC 8,192
192.138.32.0/19 DoD Network Information Center 8,192
192.172.0.0/19 DoD Network Information Center 8,192
198.97.96.0/19 DoD Network Information Center 8,192
198.250.192.0/19 DoD Network Information Center 8,192
192.138.64.0/20 DoD Network Information Center 4,096
192.156.64.0/20 MARINE CORPS CYBERSPACE OPERATIONS GROUP 4,096
192.188.208.0/20 Headquarters, USAISC 4,096
192.240.128.0/20 DoD Network Information Center 4,096
198.97.192.0/20 Headquarters, USAISC 4,096
198.97.240.0/20 DoD Network Information Center 4,096
198.250.224.0/20 DoD Network Information Center 4,096
199.114.32.0/20 Headquarters, USAISC 4,096
199.122.32.0/20 Headquarters, USAISC 4,096
199.211.176.0/20 DoD Network Information Center 4,096
199.225.0.0/20 DoD Network Information Center 4,096
199.252.32.0/20 DoD Network Information Center 4,096
192.86.112.0/21 Headquarters, USAISC 2,048
192.86.232.0/21 Headquarters, USAISC 2,048
192.108.8.0/21 Navy Network Information Center (NNIC) 2,048
192.108.176.0/21 Headquarters, USAISC 2,048
192.138.24.0/21 DoD Network Information Center 2,048
192.153.136.0/21 Headquarters, USAISC 2,048
192.153.144.0/21 Headquarters, USAISC 2,048
198.49.184.0/21 Headquarters, USAISC 2,048
198.97.72.0/21 Navy Network Information Center (NNIC) 2,048
198.97.192.0/21 Headquarters, USAISC 2,048
198.154.8.0/21 Air Force Systems Networking 2,048
198.250.240.0/21 DoD Network Information Center 2,048
199.122.56.0/21 Headquarters, USAISC 2,048
199.123.72.0/21 Headquarters, USAISC 2,048
199.123.80.0/21 Headquarters, USAISC 2,048
199.123.104.0/21 DoD Network Information Center 2,048
199.124.16.0/21 Headquarters, USAISC 2,048
204.37.8.0/21 DoD Network Information Center 2,048
192.129.64.0/22 Headquarters, USAISC 1,024
192.138.80.0/22 DoD Network Information Center 1,024
192.153.132.0/22 Headquarters, USAISC 1,024
192.187.4.0/22 Navy Network Information Center (NNIC) 1,024
192.240.144.0/22 DoD Network Information Center 1,024
198.154.72.0/22 DoD Network Information Center 1,024
6.16.172.0/23 Headquarters, USAISC 512
143.86.204.0/23 Headquarters, USAISC 512
146.55.22.0/23 Headquarters, USAISC 512
155.29.48.0/23 Headquarters, USAISC 512
155.29.166.0/23 Headquarters, USAISC 512
156.112.148.0/23 DoD Network Information Center 512
192.73.26.0/23 Headquarters, USAISC 512
192.73.28.0/23 Headquarters, USAISC 512
192.101.132.0/23 DoD Network Information Center 512
192.111.116.0/23 Navy Network Information Center (NNIC) 512
192.132.84.0/23 Headquarters, USAISC 512
192.153.244.0/23 DoD Network Information Center 512
192.156.80.0/23 MARINE CORPS CYBERSPACE OPERATIONS GROUP 512
199.122.4.0/23 DoD Network Information Center 512
199.123.122.0/23 Headquarters, USAISC 512
6.16.174.0/24 Headquarters, USAISC 256
6.64.181.0/24 Headquarters, USAISC 256
131.78.3.0/24 DoD Network Information Center 256
131.78.204.0/24 DoD Network Information Center 256
138.162.5.0/24 Navy Network Information Center (NNIC) 256
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
140.153.72.0/24 Headquarters, USAISC 256
143.81.103.0/24 Headquarters, USAISC 256
143.86.176.0/24 Headquarters, USAISC 256
144.251.43.0/24 DoD Network Information Center 256
146.55.124.0/24 Headquarters, USAISC 256
146.55.127.0/24 Headquarters, USAISC 256
192.41.202.0/24 DoD Network Information Center 256
192.42.41.0/24 Navy Network Information Center (NNIC) 256
192.86.252.0/24 Headquarters, USAISC 256
192.132.83.0/24 Headquarters, USAISC 256
192.240.129.0/24 DoD Network Information Center 256
198.25.0.0/24 DoD Network Information Center 256
199.123.91.0/24 Headquarters, USAISC 256
199.252.143.0/24 DoD Network Information Center 256
199.252.154.0/24 DoD Network Information Center 256
199.252.155.0/24 DoD Network Information Center 256
199.252.157.0/24 DoD Network Information Center 256
199.252.162.0/24 DoD Network Information Center 256
199.252.180.0/24 DoD Network Information Center 256
204.34.186.0/24 DoD Network Information Center 256
205.56.162.0/24 Navy Network Information Center (NNIC) 256
205.69.238.0/24 Navy Network Information Center (NNIC) 256
206.37.202.0/24 DoD Network Information Center 256
215.67.59.0/24 DoD Network Information Center 256

Netblock Company
2608:120::/32 United States Department of Defense (DoD)
2608:121::/32 United States Department of Defense (DoD)
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WHOIS Details

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                                                ASHandle:       AS721
                                                OrgID:          AS721
                                                ASName:         AS721
                                                ASNumber:       AS721
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
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IP WHOIS API & Database

Hosted Domains

There are 369 domain names hosted across 300 IP addresses on this ASN.

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IP Address Domain Domains on this IP
55.55.55.55 ██████████ 16
55.22.145.238 ██████████ 9
136.213.40.36 ██████████ 7
55.84.55.102 ██████████ 7
55.223.52.2 ████████ 6
131.57.48.17 █████████ 6
55.200.197.31 ██████████ 5
55.141.72.18 ██████████ 4
55.2.31.17 ██████████ 4
55.76.177.85 ██████████ 4

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Peers

There are 4 peers for this ASN.

Peers Name
AS27064 United States Department of Defense (DoD)
AS27065 United States Department of Defense (DoD)
AS27066 United States Department of Defense (DoD)
AS3356 Level 3 Parent, LLC
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ASN API & Database

Upstreams

There is 1 peer for this ASN.

upstreams Name
AS3356 Level 3 Parent, LLC
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ASN API & Database

Downstreams

There are 3 downstreams for this ASN.

Downstreams Name
AS27064 United States Department of Defense (DoD)
AS27065 United States Department of Defense (DoD)
AS27066 United States Department of Defense (DoD)
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.
ASN API & Database

Pingable IPs

56 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
214.4.150.248 AS721 United States Department of Defense (DoD) 11.08ms from Chicago, US
214.1.217.49 AS721 United States Department of Defense (DoD) 9.99ms from Dallas, US
209.22.120.14 AS721 United States Department of Defense (DoD) 10.00ms from Dallas, US
138.180.194.170 AS721 United States Department of Defense (DoD) 10.05ms from Dallas, US
214.2.212.178 AS721 United States Department of Defense (DoD) 51.79ms from Los Angeles, US
209.22.191.4 AS721 United States Department of Defense (DoD) 9.29ms from Chicago, US
214.25.107.11 AS721 United States Department of Defense (DoD) 9.98ms from Dallas, US
199.211.218.6 AS721 United States Department of Defense (DoD) 11.36ms from Frankfurt am Main, DE
214.43.143.121 AS721 United States Department of Defense (DoD) 10.04ms from Dallas, US
199.252.154.234 AS721 United States Department of Defense (DoD) 11.28ms from Frankfurt am Main, DE
140.14.51.130 AS721 United States Department of Defense (DoD) 10.68ms from Frankfurt am Main, DE
214.43.141.54 AS721 United States Department of Defense (DoD) 10.04ms from Dallas, US
192.240.129.3 AS721 United States Department of Defense (DoD) 8.50ms from Ashburn, US
214.4.152.3 AS721 United States Department of Defense (DoD) 10.90ms from Chicago, US
138.162.5.153 AS721 United States Department of Defense (DoD) 9.96ms from Dallas, US
199.252.162.234 AS721 United States Department of Defense (DoD) 11.38ms from Frankfurt am Main, DE
131.78.81.254 AS721 United States Department of Defense (DoD) 10.09ms from Dallas, US
205.56.162.34 AS721 United States Department of Defense (DoD) 11.39ms from Frankfurt am Main, DE
199.252.155.243 AS721 United States Department of Defense (DoD) 2.94ms from Honolulu, US
199.252.180.251 AS721 United States Department of Defense (DoD) 3.11ms from Honolulu, US
140.153.170.75 AS721 United States Department of Defense (DoD) 10.37ms from Charlotte, US
214.16.4.8 AS721 United States Department of Defense (DoD) 65.36ms from Honolulu, US
199.208.208.46 AS721 United States Department of Defense (DoD) 11.27ms from Chicago, US
207.132.224.125 AS721 United States Department of Defense (DoD) 10.11ms from Dallas, US
199.208.197.36 AS721 United States Department of Defense (DoD) 10.09ms from Dallas, US

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address ASN Details
73.174.198.1 AS7922 Comcast Cable Communications, LLC 7.05ms from Ashburn, US
78.108.39.1 AS8280 SYNAPSECOM TELECOMS S.A. 0.55ms from Athens, GR
113.53.163.177 AS23969 TOT Public Company Limited 8.38ms from Bangkok, TH
14.142.170.65 AS4755 TATA Communications formerly VSNL is Leading ISP 0.64ms from Bengaluru, IN
190.159.76.1 AS10620 Telmex Colombia S.A. 9.14ms from Bogota, CO
178.41.75.97 AS6855 Slovak Telekom, a.s. 1.66ms from Bratislava, SK
147.229.204.1 AS197451 Brno University of Technology 0.38ms from Brno, CZ
81.182.229.49 AS5483 Magyar Telekom Plc. 2.58ms from Budapest, HU
190.244.191.1 AS7303 Telecom Argentina S.A. 6.66ms from Buenos Aires, AR
222.209.124.1 AS4134 CHINANET-BACKBONE 2.18ms from Chengdu, CN
47.33.230.1 AS20115 Charter Communications LLC 10.94ms from Chicago, US
131.148.180.17 AS33363 Charter Communications, Inc 8.77ms from Chicago, US
67.176.167.161 AS7922 Comcast Cable Communications, LLC 6.76ms from Chicago, US
216.68.139.33 AS6181 Cincinnati Bell Telephone Company LLC 1.59ms from Cincinnati, US
176.21.95.129 AS3292 TDC Holding A/S 2.30ms from Copenhagen, DK
68.114.113.1 AS20115 Charter Communications LLC 15.18ms from Dallas, US
94.204.129.49 AS15802 Emirates Integrated Telecommunications Company PJSC 3.25ms from Dubai, AE
84.166.21.225 AS3320 Deutsche Telekom AG 2.71ms from Duesseldorf, DE
178.218.154.1 AS1257 Tele2 Sverige AB 2.64ms from Goeteborg, SE
81.228.211.1 AS3301 Telia Company AB 0.75ms from Goeteborg, SE
119.141.240.1 AS4134 CHINANET-BACKBONE 3.73ms from Guangzhou, CN
119.135.213.129 AS4134 CHINANET-BACKBONE 2.96ms from Guangzhou, CN
111.56.38.1 AS9808 China Mobile Communications Group Co., Ltd. 1.39ms from Hohhot, CN
107.163.141.145 AS132839 POWER LINE DATACENTER 1.05ms from Hong Kong, HK
89.107.24.1 AS51561 ICUK Computing Services Limited 0.41ms from London, GB

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

$
traceroute -a -n -q1 -f3 -m9 55.201.94.137
traceroute to 55.201.94.137 (55.201.94.137): 9 hops max, 52 byte packets
4 *
5 *
6 [AS3356] 64.159.250.178 248.846 ms
7 *
8 *
9 *
Measurement taken from IPinfo ProbeNet in Abidjan, CI
On

Related Networks

What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS721 at robtex.

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