Autonomous System details

AS121

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

United States
    Stub AS Icon Stub AS

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AS121 – United States Department of Defense (DoD)

Field Value
Country United States
Website mail.mil
Hosted domains 0
IPv4 addresses 9,728
IPv6 addresses 0
ASN type Government
Registry arin
Allocated 38 years ago on Aug 13, 1987
Updated 3 months ago on Sep 12, 2025

IP Ranges

Netblock Company Num of IPs
214.54.192.0/20 DoD Network Information Center 4,096
214.54.208.0/20 DoD Network Information Center 4,096
214.54.224.0/23 DoD Network Information Center 512
214.54.226.0/23 DoD Network Information Center 512
214.54.230.0/24 DoD Network Information Center 256
214.54.231.0/24 DoD Network Information Center 256

There are no known IPv6 addresses belonging to this network

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WHOIS Details

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                                                ASHandle:       AS121
                                                OrgID:          AS121
                                                ASName:         AS121
                                                ASNumber:       AS121
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
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Hosted Domains

There are no domains currently hosted on this ASN.

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Peers

There is 1 peer for this ASN.

Peers Name
AS668 United States Department of Defense (DoD)
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Upstreams

There is 1 peer for this ASN.

upstreams Name
AS668 United States Department of Defense (DoD)
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Downstreams

There are no downstreams for this ASN.

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Pingable IPs

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

IP Address ASN Details
214.54.209.225 AS121 United States Department of Defense (DoD) 1.78ms from Los Angeles, US
214.54.231.171 AS121 United States Department of Defense (DoD) 1.77ms from Los Angeles, US
214.54.219.175 AS121 United States Department of Defense (DoD) 1.79ms from Los Angeles, US
214.54.223.176 AS121 United States Department of Defense (DoD) 1.77ms from Los Angeles, US
214.54.218.107 AS121 United States Department of Defense (DoD) 1.77ms from Los Angeles, US
214.54.222.184 AS121 United States Department of Defense (DoD) 1.76ms from Los Angeles, US
214.54.225.102 AS121 United States Department of Defense (DoD) 0.63ms from Honolulu, US
214.54.215.249 AS121 United States Department of Defense (DoD) 1.78ms from Los Angeles, US
214.54.210.117 AS121 United States Department of Defense (DoD) 1.79ms from Los Angeles, US
214.54.214.90 AS121 United States Department of Defense (DoD) 1.79ms from Los Angeles, US
214.54.213.226 AS121 United States Department of Defense (DoD) 1.72ms from Los Angeles, US
214.54.211.54 AS121 United States Department of Defense (DoD) 1.78ms from Los Angeles, US
214.54.224.182 AS121 United States Department of Defense (DoD) 0.63ms from Honolulu, US
214.54.216.46 AS121 United States Department of Defense (DoD) 1.79ms from Los Angeles, US
214.54.221.77 AS121 United States Department of Defense (DoD) 1.76ms from Los Angeles, US
214.54.208.170 AS121 United States Department of Defense (DoD) 1.78ms from Los Angeles, US
214.54.217.219 AS121 United States Department of Defense (DoD) 1.74ms from Los Angeles, US
214.54.212.158 AS121 United States Department of Defense (DoD) 1.78ms from Los Angeles, US
214.54.220.17 AS121 United States Department of Defense (DoD) 1.73ms from Los Angeles, 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
119.255.194.73 AS23724 IDC, China Telecommunications Corporation 4.83ms from Beijing, CN
104.240.121.41 AS5650 Frontier Communications of America, Inc. 8.30ms from Chicago, US
50.5.240.201 AS6181 Cincinnati Bell Telephone Company LLC 1.94ms from Cincinnati, US
69.135.18.249 AS10796 Charter Communications Inc 3.94ms from Columbus, US
12.215.12.217 AS7018 AT&T Enterprises, LLC 15.36ms from Dallas, US
65.154.228.169 AS209 CenturyLink Communications, LLC 0.66ms from Denver, US
2.166.182.121 AS3320 Deutsche Telekom AG 12.15ms from Frankfurt am Main, DE
41.10.230.25 AS36994 Vodacom 2.43ms from Johannesburg, ZA
181.115.146.9 AS6568 EMPRESA NACIONAL DE TELECOMUNICACIONES SOCIEDAD ANONIMA 9.77ms from La Paz, BO
79.158.255.89 AS3352 TELEFONICA DE ESPANA S.A.U. 11.36ms from Madrid, ES
50.221.22.233 AS7922 Comcast Cable Communications, LLC 1.99ms from Miami, US
217.221.42.41 AS8968 BT Italia S.p.A. 7.61ms from Milan, IT
211.141.222.137 AS9808 China Mobile Communications Group Co., Ltd. 5.36ms from Nanjing, CN
162.255.193.41 AS26881 IPR International, LLC. 3.41ms from New York City, US
58.58.41.9 AS4134 CHINANET-BACKBONE 1.77ms from Qingdao, CN
84.208.244.25 AS25400 Telia Norge AS 8.59ms from Sandefjord, NO
1.216.223.41 AS3786 LG DACOM Corporation 2.02ms from Seoul, KR
211.171.237.217 AS3786 LG DACOM Corporation 1.96ms from Seoul, KR
112.87.40.57 AS4837 CHINA UNICOM China169 Backbone 4.32ms from Shanghai, CN
203.169.115.249 AS3758 SingNet 1.59ms from Singapore, SG
221.254.75.41 AS17506 ARTERIA Networks Corporation 1.24ms from Tokyo, JP
124.34.66.217 AS17506 ARTERIA Networks Corporation 1.72ms from Tokyo, JP
88.222.180.41 AS24877 UAB INIT 2.16ms from Vilnius, LT
91.213.133.249 AS31424 Netrics AG 0.81ms from Zuerich, CH
163.44.196.153 AS135161 GMO-Z com NetDesign Holdings Co., Ltd. 0.56ms from Bangkok, TH

Traceroute

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

$
traceroute -a -n -q1 -m5 214.54.205.159
traceroute to 214.54.205.159 (214.54.205.159): 5 hops max, 52 byte packets
3 *
4 *
5 *
Measurement taken from IPinfo ProbeNet in Asuncion, PY
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 AS121 at robtex.

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