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 135 domain names hosted across 91 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	prudentman.idv.tw	13
21.239.38.21	newsjavapost.my.id	10
21.239.34.21	tipikor.web.id	10
21.102.132.164	rrrgzbp.xyz	9
21.239.36.21	fokuskriminal.my.id	9
21.217.30.2	srv1-chaabibourse.ma	7
21.163.217.17	jzakjlbjdsf.net	4
21.21.234.173	thephotographybusinessblueprint.com	4
21.21.21.21	smartgenesis.world	4
21.43.161.6	hawkishcapital.com	3
21.232.223.19	xinqiu88.com	2
21.17.81.45	imiela.biz	2
21.122.80.74	xn--v6qw0ao61gomj.com	2
21.23.221.218	shonaandassociates.com	2
21.222.38.65	ubuntudescontao.com.br	2
21.53.238.17	iyskgefmgl.com	2
21.31.21.2	kaozdesigns.com	2
21.11.100.151	getsms.online	2
21.120.59.225	teamstargyalo.hu	1
21.237.82.174	gnd-03.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)	`23.57ms` from Fortaleza, BR

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
100.31.149.184	AS14618 Amazon.com, Inc.	`0.76ms` from Ashburn, US
220.244.12.168	AS7545 TPG Telecom Limited	`1.55ms` from Brisbane, AU
78.160.245.216	AS9121 Turk Telekomunikasyon Anonim Sirketi	`8.78ms` from Bursa, TR
75.221.222.56	AS6167 Verizon Business	`17.00ms` from Chicago, US
97.122.180.120	AS209 CenturyLink Communications, LLC	`2.44ms` from Denver, US
105.244.12.8	AS36994 Vodacom	`0.59ms` from Johannesburg, ZA
80.47.15.232	AS13285 TalkTalk Communications Limited	`3.55ms` from London, GB
189.97.120.8	AS26599 TELEFÔNICA BRASIL S.A	`1.10ms` from Novo Hamburgo, BR
60.156.253.200	AS17676 SoftBank Corp.	`3.57ms` from Osaka, JP
114.149.93.248	AS4713 NTT DOCOMO BUSINESS,Inc.	`8.55ms` from Tokyo, JP
142.189.41.72	AS577 Bell Canada	`1.34ms` from Toronto, CA
70.49.98.72	AS577 Bell Canada	`4.53ms` from Toronto, CA
201.210.189.184	AS8048 CANTV Servicios, Venezuela	`13.39ms` from Willemstad, CW
85.3.201.120	AS3303 Swisscom (Switzerland) Ltd	`2.39ms` from Zuerich, CH
172.172.188.72	AS8075 Microsoft Corporation	`0.61ms` from Ashburn, US
124.202.189.104	AS4808 China Unicom Beijing Province Network	`3.64ms` from Beijing, CN
130.111.230.88	AS557 University of Maine System	`8.41ms` from Boston, US
98.144.145.72	AS10796 Charter Communications Inc	`6.88ms` from Chicago, US
71.74.115.104	AS10796 Charter Communications Inc	`12.97ms` from Columbus, US
73.26.198.152	AS7922 Comcast Cable Communications, LLC	`11.51ms` from Denver, US
103.152.104.200	AS140849 Pan M Tech Limited	`0.25ms` from Dhaka, BD
183.56.238.72	AS135089 China Telecom	`2.24ms` from Guangzhou, CN
128.171.82.248	AS6360 University of Hawaii	`8.50ms` from Honolulu, US
40.192.117.40	AS16509 Amazon.com, Inc.	`1.54ms` from Hyderabad, IN
81.30.160.8	AS24945 Telecommunication Company Vinteleport Ltd.	`2.75ms` from Kyiv, UA

Traceroute

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

traceroute -a -n -q1 -m5 21.155.24.121

traceroute to 21.155.24.121 (21.155.24.121): 5 hops max, 52 byte packets

1 [AS31898] 140.91.198.115 0.088 ms

2 [AS3356] 62.67.24.22 0.38 ms

3 *

4 *

5 *

Measurement taken from

IPinfo ProbeNet in Frankfurt am Main, DE

On December 28th 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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