21.0.0.0/8

AS749 · United States Department of Defense (DoD)

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Summary

Country	United States
Domain	mail.mil
ASN	AS749
Registry	ARIN
ID	DNIC-SNET-021

WHOIS Details

NetHandle:      NET-21-0-0-0-2
OrgID:          DNIC
Parent:         NET-21-0-0-0-1
NetName:        DNIC-SNET-021
NetRange:       21.0.0.0 - 21.255.255.255
NetType:        reallocation
RegDate:        2025-09-05
Updated:        2025-09-05
Source:         ARIN


OrgID:          DNIC
OrgName:        DoD Network Information Center
CanAllocate:    
Street:         3990 E. Broad Street
City:           Columbus
State/Prov:     OH
Country:        US
PostalCode:     43218
RegDate:        1970-01-01
Updated:        2025-03-13
OrgAdminHandle: MIL-HSTMST-ARIN
OrgTechHandle:  MIL-HSTMST-ARIN
OrgTechHandle:  REGIS10-ARIN
OrgAbuseHandle: REGIS10-ARIN
Source:         ARIN


POCHandle:      MIL-HSTMST-ARIN
IsRole:         Y
LastName:       Network DoD
FirstName:      
Street:         DISA-Columbus
Street:         300 North James Road
City:           Whitehall
State/Prov:     OH
Country:        US
PostalCode:     43213
RegDate:        1993-05-26
Updated:        2025-02-12
OfficePhone:    +1-844-347-2457
Mailbox:        disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
Source:         ARIN


POCHandle:      REGIS10-ARIN
IsRole:         Y
LastName:       Registration
FirstName:      
Street:         DISA-Columbus
Street:         300 North James Road
City:           Whitehall
State/Prov:     OH
Country:        US
PostalCode:     43213
RegDate:        2009-06-24
Updated:        2025-02-13
OfficePhone:    +1-844-347-2457
Mailbox:        disa.columbus.ns.mbx.arin-registrations@mail.mil
Source:         ARIN

Hosted domains

There are 126 domain names hosted across 82 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
21.239.32.21	kksshh.com	12
21.239.38.21	prudentman.idv.tw	10
21.239.34.21	prudentman.idv.tw	10
21.239.36.21	fokuskriminal.my.id	9
21.102.132.164	cnenvue.xyz	9
21.217.30.2	srv1-professionnels-gbp.ma	7
21.21.234.173	3hive.xyz	6
21.21.21.21	smartgenesis.world	4
21.43.161.6	hawkishcapital.com	4
21.163.217.17	jzakjlbjdsf.net	4
21.123.12.12	luminbody.com	2
21.232.223.19	xinqiu88.com	2
21.17.20.238	tubeyou.us	2
21.17.81.45	imiela.biz	2
21.21.157.88	groundupscaling.com	2
21.122.80.74	xn--v6qw0ao61gomj.com	2
21.53.238.17	iyskgefmgl.com	2
21.217.38.36	restockcentral.com	1
21.227.159.244	rauter-tax.at	1
21.41.130.148	aqtgzx.com	1

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
21.21.21.1	AS749 United States Department of Defense (DoD)	`11.66ms` from Surabaya, ID

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
60.246.182.136	AS4609 Companhia de Telecomunicacoes de Macau SARL	`3.01ms` from Hong Kong, HK
91.144.30.24	AS29256 STE PDN Internal AS	`10.83ms` from Limassol, CY
80.18.135.56	AS3269 Telecom Italia S.p.A.	`4.78ms` from Milan, IT
162.156.230.56	AS852 TELUS Communications Inc.	`7.25ms` from Montreal, CA
54.83.9.88	AS14618 Amazon.com, Inc.	`0.15ms` from Reston, US
189.168.186.56	AS8151 UNINET	`11.10ms` from Santiago de Queretaro, MX
125.153.244.72	AS4766 Korea Telecom	`6.52ms` from Seoul, KR
13.214.207.40	AS16509 Amazon.com, Inc.	`0.30ms` from Singapore, SG
61.208.155.200	AS4713 NTT DOCOMO BUSINESS,Inc.	`2.58ms` from Tokyo, JP
24.108.158.24	AS6327 Shaw Communications Inc.	`5.88ms` from Vancouver, CA
23.16.66.104	AS852 TELUS Communications Inc.	`3.56ms` from Vancouver, CA
106.46.46.216	AS4134 CHINANET-BACKBONE	`5.47ms` from Zhengzhou, CN
85.3.201.120	AS3303 Swisscom (Switzerland) Ltd	`2.34ms` from Zuerich, CH
37.220.143.24	AS50261 ACE Telecom Kft	`0.54ms` from Budapest, HU
113.242.103.56	AS4134 CHINANET-BACKBONE	`3.10ms` from Changsha, CN
183.56.238.72	AS135089 China Telecom	`2.25ms` from Guangzhou, CN
111.122.98.88	AS4134 CHINANET-BACKBONE	`3.06ms` from Guiyang, CN
111.85.156.72	AS4837 CHINA UNICOM China169 Backbone	`6.84ms` from Guiyang, CN
171.231.229.168	AS7552 Viettel Group	`2.92ms` from Hanoi, VN
85.251.150.248	AS6739 VODAFONE ONO, S.A.	`5.36ms` from Madrid, ES
27.220.190.152	AS4837 CHINA UNICOM China169 Backbone	`9.48ms` from Qingdao, CN
54.235.237.248	AS14618 Amazon.com, Inc.	`0.23ms` from Reston, US
118.61.9.56	AS4766 Korea Telecom	`4.30ms` from Seoul, KR
210.204.143.232	AS4766 Korea Telecom	`2.31ms` from Seoul, KR
36.224.45.184	AS3462 Data Communication Business Group	`1.04ms` from Taipei, TW

Traceroute

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

traceroute -a -n -q1 -f2 -m5 21.209.151.226

traceroute to 21.209.151.226 (21.209.151.226): 5 hops max, 52 byte packets

2 [AS24961] 62.141.47.8 0.177 ms

3 *

4 *

5 *

Measurement taken from

IPinfo ProbeNet in Duesseldorf, DE

On October 30th 2025

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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