AS number details

AS121

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

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AS121 – United States Department of Defense (DoD)

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


                                                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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Useful for Cybersecurity

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

No IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

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
130.244.200.57 AS1257 Tele2 Sverige AB 0.53ms from Amsterdam, NL
217.217.128.169 AS59642 UAB Cherry Servers 0.34ms from Amsterdam, NL
68.143.30.105 AS7029 Windstream Communications LLC 8.42ms from Atlanta, US
211.143.62.25 AS24547 Hebei Mobile Communication Company Limited 7.22ms from Beijing, CN
118.203.96.249 AS4538 China Education and Research Network Center 14.53ms from Dalian, CN
12.216.30.73 AS7018 AT&T Enterprises, LLC 1.74ms from Denver, US
129.16.41.185 AS2841 Chalmers University of Technology 0.86ms from Goeteborg, SE
140.246.31.89 AS58519 Cloud Computing Corporation 0.27ms from Guiyang, CN
35.227.198.201 AS396982 Google LLC 0.08ms from Melbourne, AU
73.49.47.57 AS7922 Comcast Cable Communications, LLC 9.69ms from Miami, US
69.128.53.41 AS4181 TDS TELECOM 3.72ms from Monticello, US
211.141.222.137 AS9808 China Mobile Communications Group Co., Ltd. 5.37ms from Nanjing, CN
46.171.240.89 AS5617 Orange Polska Spolka Akcyjna 1.09ms from Poznan, PL
98.234.146.153 AS7922 Comcast Cable Communications, LLC 6.94ms from Santa Clara, US
112.220.210.249 AS3786 LG DACOM Corporation 1.99ms from Seoul, KR
115.125.149.137 AS17506 ARTERIA Networks Corporation 1.73ms from Tokyo, JP
159.203.35.9 AS14061 DigitalOcean, LLC 0.26ms from Toronto, CA
85.124.40.57 AS8412 T-Mobile Austria GmbH 15.05ms from Vienna, AT
188.201.198.89 AS1136 KPN B.V. 1.92ms from Amsterdam, NL
66.56.171.73 AS11426 Charter Communications Inc 15.35ms from Atlanta, US
12.45.17.57 AS7018 AT&T Enterprises, LLC 6.42ms from Atlanta, US
107.7.192.105 AS7029 Windstream Communications LLC 4.01ms from Atlanta, US
87.116.156.217 AS31042 Serbia BroadBand-Srpske Kablovske mreze d.o.o. 1.18ms from Belgrade, RS
41.193.218.9 AS11845 Vox Telecom Ltd 1.47ms from Cape Town, ZA
200.146.72.233 AS18881 TELEFÔNICA BRASIL S.A 0.28ms from Curitiba, BR

Traceroute

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

$
traceroute -a -n -q1 -m5 214.54.199.101
traceroute to 214.54.199.101 (214.54.199.101): 5 hops max, 52 byte packets
1 [AS198037] 80.76.43.1 0.235 ms
2 [] 185.0.27.2 1.062 ms
3 *
4 *
5 *
Measurement taken from IPinfo ProbeNet in Frankfurt am Main, DE
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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