AS number 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 364
Number of IPv4 72,104,704
Number of IPv6 158,456,325,028,528,675,187,087,900,672
ASN type Business
Registry arin
Allocated 56 years ago on Jan 01, 1970
Updated 19 days ago on Sep 12, 2025

IP Ranges

Netblock Company Num of IPs
214.0.0.0/8 DoD Network Information Center 16,777,216
55.0.0.0/8 Headquarters, USAISC 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
132.128.0.0/12 Headquarters, USAISC 1,048,576
132.80.0.0/12 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
137.240.0.0/14 Air Force Systems Networking 262,144
137.8.0.0/14 DoD Network Information Center 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
158.236.0.0/14 MARINE CORPS CYBERSPACE OPERATIONS GROUP 262,144
158.240.0.0/14 MARINE CORPS CYBERSPACE OPERATIONS GROUP 262,144
158.8.0.0/14 DoD Network Information Center 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
155.150.0.0/15 Headquarters, USAISC 131,072
155.214.0.0/15 Headquarters, USAISC 131,072
155.8.0.0/15 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
134.135.0.0/16 DoD Network Information Center 65,536
134.233.0.0/16 Headquarters, USAISC 65,536
134.235.0.0/16 Headquarters, USAISC 65,536
134.80.0.0/16 Headquarters, USAISC 65,536
137.209.0.0/16 DoD Network Information Center 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
138.50.0.0/16 Headquarters, USAISC 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
140.201.0.0/16 Headquarters, USAISC 65,536
140.21.0.0/16 DoD Network Information Center 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
155.155.0.0/16 Headquarters, USAISC 65,536
155.252.0.0/16 Navy Network Information Center (NNIC) 65,536
155.7.0.0/16 DoD Network Information Center 65,536
159.77.0.0/16 DoD Network Information Center 65,536
164.236.0.0/16 DoD Network Information Center 65,536
164.87.0.0/16 DoD Network Information Center 65,536
198.220.0.0/16 Air Force Systems Networking 65,536
198.25.0.0/16 DoD Network Information Center 65,536
198.26.0.0/16 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
199.57.0.0/16 DoD Network Information Center 65,536
204.208.0.0/16 Headquarters, USAISC 65,536
204.34.0.0/16 DoD Network Information Center 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
143.85.128.0/18 Headquarters, USAISC 16,384
143.85.192.0/18 Headquarters, USAISC 16,384
143.85.64.0/18 Headquarters, USAISC 16,384
192.156.0.0/18 MARINE CORPS CYBERSPACE OPERATIONS GROUP 16,384
198.250.128.0/18 DoD Network Information Center 16,384
198.250.192.0/18 DoD Network Information Center 16,384
198.97.128.0/18 Headquarters, USAISC 16,384
199.211.192.0/18 DoD Network Information Center 16,384
199.211.64.0/18 DoD Network Information Center 16,384
199.252.128.0/18 DoD Network Information Center 16,384
199.32.128.0/18 DoD Network Information Center 16,384
199.9.64.0/18 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
198.250.192.0/19 DoD Network Information Center 8,192
198.97.96.0/19 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
198.250.224.0/20 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
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
192.108.176.0/21 Headquarters, USAISC 2,048
192.108.8.0/21 Navy Network Information Center (NNIC) 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
192.86.112.0/21 Headquarters, USAISC 2,048
192.86.232.0/21 Headquarters, USAISC 2,048
198.154.64.0/21 DoD Network Information Center 2,048
198.154.8.0/21 Air Force Systems Networking 2,048
198.250.240.0/21 DoD Network Information Center 2,048
198.49.184.0/21 Headquarters, USAISC 2,048
198.97.192.0/21 Headquarters, USAISC 2,048
198.97.72.0/21 Navy Network Information Center (NNIC) 2,048
199.122.56.0/21 Headquarters, USAISC 2,048
199.123.104.0/21 DoD Network Information Center 2,048
199.123.72.0/21 Headquarters, USAISC 2,048
199.123.80.0/21 Headquarters, USAISC 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
192.188.204.0/22 Headquarters, USAISC 1,024
192.240.144.0/22 DoD Network Information Center 1,024
198.154.72.0/22 DoD Network Information Center 1,024
143.86.204.0/23 Headquarters, USAISC 512
146.55.22.0/23 Headquarters, USAISC 512
155.29.166.0/23 Headquarters, USAISC 512
155.29.48.0/23 Headquarters, USAISC 512
156.112.148.0/23 DoD Network Information Center 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
192.73.26.0/23 Headquarters, USAISC 512
192.73.28.0/23 Headquarters, USAISC 512
199.122.4.0/23 DoD Network Information Center 512
199.123.122.0/23 Headquarters, USAISC 512
6.16.172.0/23 Headquarters, USAISC 512
131.78.204.0/24 DoD Network Information Center 256
131.78.3.0/24 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
192.132.83.0/24 Headquarters, USAISC 256
192.240.129.0/24 DoD Network Information Center 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
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
6.16.174.0/24 Headquarters, USAISC 256
6.64.181.0/24 Headquarters, USAISC 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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Hosted Domains

There are 364 domain names hosted across 296 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 ██████████ 8
136.213.40.36 ██████████ 7
55.223.52.2 ██████████ 7
55.84.55.102 ██████████ 7
131.57.48.17 █████████ 6
55.200.197.31 ██████████ 6
55.76.177.85 ██████████ 4
55.2.31.17 ██████████ 4
55.141.72.18 ██████████ 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 ASN Database Download

Upstreams

There is 1 peer for this ASN.

upstreams Name
AS3356 Level 3 Parent, LLC
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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 ASN Database Download

Pingable IPs

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

IP Address ASN Details
214.2.210.180 AS721 United States Department of Defense (DoD) 10.24ms from Dallas, US
131.78.4.148 AS721 United States Department of Defense (DoD) 10.20ms from Dallas, US
199.252.154.234 AS721 United States Department of Defense (DoD) 5.25ms from Frankfurt am Main, DE
214.38.128.50 AS721 United States Department of Defense (DoD) 10.99ms from Chicago, US
207.132.240.40 AS721 United States Department of Defense (DoD) 10.09ms from Dallas, US
214.1.217.33 AS721 United States Department of Defense (DoD) 10.09ms from Dallas, US
140.14.49.140 AS721 United States Department of Defense (DoD) 14.88ms from London, GB
207.133.192.8 AS721 United States Department of Defense (DoD) 36.06ms from Los Angeles, US
214.81.217.17 AS721 United States Department of Defense (DoD) 10.02ms from Dallas, US
138.180.194.171 AS721 United States Department of Defense (DoD) 10.07ms from Dallas, US
204.34.159.10 AS721 United States Department of Defense (DoD) 10.15ms from Dallas, US
199.252.162.234 AS721 United States Department of Defense (DoD) 5.18ms from Frankfurt am Main, DE
199.252.155.243 AS721 United States Department of Defense (DoD) 3.91ms from Honolulu, US
214.43.143.121 AS721 United States Department of Defense (DoD) 10.11ms from Dallas, US
214.25.107.11 AS721 United States Department of Defense (DoD) 10.15ms from Dallas, US
207.133.227.100 AS721 United States Department of Defense (DoD) 10.09ms from Dallas, US
143.147.254.23 AS721 United States Department of Defense (DoD) 9.44ms from Chicago, US
214.16.4.6 AS721 United States Department of Defense (DoD) 11.03ms from Chicago, US
132.3.48.140 AS721 United States Department of Defense (DoD) 10.11ms from Dallas, US
209.22.120.14 AS721 United States Department of Defense (DoD) 10.09ms from Dallas, US
199.252.143.251 AS721 United States Department of Defense (DoD) 5.15ms from Frankfurt am Main, DE
214.28.171.193 AS721 United States Department of Defense (DoD) 10.35ms from Charlotte, US
164.236.160.19 AS721 United States Department of Defense (DoD) 10.18ms from Dallas, US
214.2.214.180 AS721 United States Department of Defense (DoD) 10.14ms from Dallas, US
199.208.208.46 AS721 United States Department of Defense (DoD) 11.05ms from Chicago, 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
82.75.93.1 AS33915 Vodafone Libertel B.V. 4.84ms from Amsterdam, NL
206.74.135.1 AS10279 West Carolina Communications, LLC 4.91ms from Atlanta, US
114.23.3.1 AS56030 Voyager Internet Ltd. 0.34ms from Auckland, NZ
118.144.8.1 AS4808 China Unicom Beijing Province Network 4.47ms from Beijing, CN
82.155.238.1 AS3243 MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A. 5.06ms from Braga, PT
189.73.206.33 AS8167 V tal 18.42ms from Brasilia, BR
188.24.200.49 AS8708 DIGI ROMANIA S.A. 5.21ms from Bucharest, RO
81.214.123.33 AS9121 Turk Telekomunikasyon Anonim Sirketi 14.39ms from Bursa, TR
204.71.100.1 AS11255 Screamin' Banshee Technologies 19.74ms from Chicago, US
23.212.82.129 AS16625 Akamai Technologies, Inc. 0.49ms from Dallas, US
72.213.125.1 AS22773 Cox Communications Inc. 6.16ms from Dallas, US
70.182.148.161 AS22773 Cox Communications Inc. 10.25ms from Dallas, US
69.31.82.209 AS3257 GTT Communications Inc. 0.29ms from Dallas, US
54.72.165.225 AS16509 Amazon.com, Inc. 0.21ms from Dublin, IE
157.23.236.65 AS22604 Disney Streaming Services 0.29ms from Frankfurt am Main, DE
93.197.113.113 AS3320 Deutsche Telekom AG 2.73ms from Frankfurt am Main, DE
217.234.36.209 AS3320 Deutsche Telekom AG 5.20ms from Frankfurt am Main, DE
189.195.146.1 AS13999 Mega Cable, S.A. de C.V. 8.72ms from Guadalajara, MX
218.16.230.177 AS140308 CHINATELECOM Guangdong province Zhuhai 5G network 8.37ms from Guangzhou, CN
61.143.191.1 AS140308 CHINATELECOM Guangdong province Zhuhai 5G network 10.02ms from Guangzhou, CN
58.252.105.241 AS17816 China Unicom IP network China169 Guangdong province 4.65ms from Guangzhou, CN
116.21.68.1 AS4134 CHINANET-BACKBONE 4.32ms from Guangzhou, CN
82.141.111.17 AS719 Elisa Oyj 0.64ms from Helsinki, FI
103.178.8.17 AS147168 PT NTT Indonesia 1.08ms from Jakarta, ID
164.58.180.129 AS5078 Oklahoma Network for Education Enrichment and 5.06ms from Kansas City, US

Traceroute

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

$
traceroute -a -n -q1 -m5 55.144.159.45
traceroute to 55.144.159.45 (55.144.159.45): 5 hops max, 52 byte packets
1 [AS140627] 103.112.0.1 0.223 ms
2 [AS140627] 103.151.64.29 108.899 ms
3 *
4 *
5 *
Measurement taken from IPinfo ProbeNet in Agana Heights Village, GU
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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