21cs.com - dns.ninja

`21cs.com`

DNSSEC	⚠️ Not signed
A	199.60.103.49^{🇺🇸 CLOUDFLARESPECTRUM199.60.103.0/24 MNT-HUBSP-8 route 199.060.103.000/24 AS209242}
A	199.60.103.149^{🇺🇸 CLOUDFLARESPECTRUM199.60.103.0/24 MNT-HUBSP-8 route 199.060.103.000/24 AS209242}
NS	`ns-487.awsdns-60.com` ⭐
		A	2600:9000:5301:e700::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-487.awsdns-60.com`
		A	205.251.193.231^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-487.awsdns-60.com`
NS	`ns-1124.awsdns-12.org`
		A	2600:9000:5304:6400::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1124.awsdns-12.org`
		A	205.251.196.100^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1124.awsdns-12.org`
NS	`ns-1645.awsdns-13.co.uk`
		A	2600:9000:5306:6d00::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1645.awsdns-13.co.uk`
		A	205.251.198.109^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1645.awsdns-13.co.uk`
NS	`ns-589.awsdns-09.net`
		A	2600:9000:5302:4d00::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-589.awsdns-09.net`
		A	205.251.194.77^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-589.awsdns-09.net`
MX	`21cs-com.mail.protection.outlook.com` ⭐
		A	52.101.9.11^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-bl2pr04cu00103.inbound.protection.outlook.com`
		A	52.101.10.5^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-bn6pr04cu00105.inbound.protection.outlook.com`
		A	52.101.11.9^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-sn1pr02cu00101.inbound.protection.outlook.com`
		A	52.101.194.15^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-ch4pr21cu00107.inbound.protection.outlook.com`
TXT	`anthropic-domain-verification-prcnwk=0znkqfZI0qv2ToANA0V19p5td`
TXT	`atlassian-domain-verification=xMSlwRaB5wpkzytV8nDjeCA6ksPrzY7XWVEPOuPH0TeMpai...`
TXT	`b8dvnwn7q6cp2tzxkjvly5wy14jmn34m`
TXT	`v=spf1 ip4:164.90.172.12 include:spf.protection.outlook.com include:smtp.ulti...`
SOA	`ns-487.awsdns-60.com`awsdns-hostmaster@amazon.com serial=1

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1785449827

Subdomains

www.21cs.com

Same first word

21cs.biz

21cs.tw

21cs.com.au

21cs.net

21cs.com.cn

21cs.cn

21cs.com

21cs.me

21cs.co.uk

Similar names

12sc.tv

cs12.com

1s2c.com

2sc1.com

cs21.cz

cs21.com

12cs.org

sc21.ru

1c2s.ca

12sc.cn

sc21.net

12cs.net

12cs.fail

cs21.ru

cs12.net

12sc.ca

c21s.co.uk

2s1c.com

c2s1.cn

sc21.info

cs21.jp

cs12.de

2c1s.com

12sc.net

cs12.fr

cs21.de

cs21.com.cn

cs21.it

12cs.eu

12cs.de

12sc.com

21sc.com

sc21.cn

cs21.kr

cs21.cn

12sc.top

sc21.biz

1c2s.com

cs21.co.jp

12sc.org

12cs.ru

sc21.com

s1c2.com

DNS History

22 records (7 active, 15 former)

●NSns-1124.awsdns-12.org2026-03-14 → 2026-07-30 · 3 obs

○ 2017-05-20 23:42:12
● 2026-03-14 00:47:48
● 2026-07-30 22:21:40

●NSns-1645.awsdns-13.co.uk2026-03-14 → 2026-07-30 · 3 obs

○ 2017-05-20 23:42:12
● 2026-03-14 00:47:48
● 2026-07-30 22:21:40

●NSns-487.awsdns-60.com2026-03-14 → 2026-07-30 · 3 obs

○ 2017-05-20 23:42:12
● 2026-03-14 00:47:48
● 2026-07-30 22:21:40

●NSns-589.awsdns-09.net2026-03-14 → 2026-07-30 · 3 obs

○ 2017-05-20 23:42:12
● 2026-03-14 00:47:48
● 2026-07-30 22:21:40

○NSns1.21cs.com2015-09-01 → 2015-12-30 · 4 obs

● 2015-09-01 15:25:06
● 2015-12-30 00:28:24
○ 2016-07-26 21:45:32
○ 2026-07-30 22:21:40

○NSns1.ashcom.net2015-09-01 → 2015-12-30 · 4 obs

● 2015-09-01 15:25:06
● 2015-12-30 00:28:24
○ 2016-07-26 21:45:32
○ 2026-07-30 22:21:40

○NSns1.chi1.etrn.com2016-07-26 → 2017-05-20 · 5 obs

○ 2015-12-30 00:28:24
● 2016-07-26 21:45:32
● 2017-05-20 23:42:12
○ 2026-03-14 00:47:48
○ 2026-07-30 22:21:40

○NSns1.chi3.etrn.com2016-07-26 → 2017-05-20 · 5 obs

○ 2015-12-30 00:28:24
● 2016-07-26 21:45:32
● 2017-05-20 23:42:12
○ 2026-03-14 00:47:48
○ 2026-07-30 22:21:40

○NSns1.fmt.etrn.com2016-07-26 → 2017-05-20 · 5 obs

○ 2015-12-30 00:28:24
● 2016-07-26 21:45:32
● 2017-05-20 23:42:12
○ 2026-03-14 00:47:48
○ 2026-07-30 22:21:40

○NSns2.chi1.etrn.com2016-07-26 → 2017-05-20 · 5 obs

○ 2015-12-30 00:28:24
● 2016-07-26 21:45:32
● 2017-05-20 23:42:12
○ 2026-03-14 00:47:48
○ 2026-07-30 22:21:40

○NSns2.chi3.etrn.com2016-07-26 → 2017-05-20 · 5 obs

○ 2015-12-30 00:28:24
● 2016-07-26 21:45:32
● 2017-05-20 23:42:12
○ 2026-03-14 00:47:48
○ 2026-07-30 22:21:40

○NSns2.fmt.etrn.com2016-07-26 → 2017-05-20 · 5 obs

○ 2015-12-30 00:28:24
● 2016-07-26 21:45:32
● 2017-05-20 23:42:12
○ 2026-03-14 00:47:48
○ 2026-07-30 22:21:40

○NSns3.chi3.etrn.com2016-07-26 → 2017-05-20 · 5 obs

○ 2015-12-30 00:28:24
● 2016-07-26 21:45:32
● 2017-05-20 23:42:12
○ 2026-03-14 00:47:48
○ 2026-07-30 22:21:40

○MX21cs-com.b.mx.etrn.com2016-07-26 → 2017-05-20 · 5 obs

○ 2015-12-30 00:28:24
● 2016-07-26 21:45:32
● 2017-05-20 23:42:12
○ 2026-03-14 00:47:48
○ 2026-07-30 22:21:40

○MX21cs-com.d.mx.etrn.com2016-07-26 → 2017-05-20 · 5 obs

○ 2015-12-30 00:28:24
● 2016-07-26 21:45:32
● 2017-05-20 23:42:12
○ 2026-03-14 00:47:48
○ 2026-07-30 22:21:40

●MX21cs-com.mail.protection.outlook.com2026-03-14 → 2026-07-30 · 3 obs

○ 2017-05-20 23:42:12
● 2026-03-14 00:47:48
● 2026-07-30 22:21:40

○MXmx03.goinet.com2015-09-01 → 2015-12-30 · 4 obs

● 2015-09-01 15:25:06
● 2015-12-30 00:28:24
○ 2016-07-26 21:45:32
○ 2026-07-30 22:21:40

○MXmx04.goinet.com2015-09-01 → 2015-12-30 · 4 obs

● 2015-09-01 15:25:06
● 2015-12-30 00:28:24
○ 2016-07-26 21:45:32
○ 2026-07-30 22:21:40

○A192.232.14.1322016-07-26 → 2017-05-20 · 5 obs

○ 2015-12-30 00:28:24
● 2016-07-26 21:45:32
● 2017-05-20 23:42:12
○ 2026-03-14 00:47:48
○ 2026-07-30 22:21:40

●A199.60.103.1492026-03-14 → 2026-07-30 · 3 obs

○ 2017-05-20 23:42:12
● 2026-03-14 00:47:48
● 2026-07-30 22:21:40

●A199.60.103.492026-03-14 → 2026-07-30 · 3 obs

○ 2017-05-20 23:42:12
● 2026-03-14 00:47:48
● 2026-07-30 22:21:40

○A216.238.217.202015-09-01 → 2015-12-30 · 4 obs

● 2015-09-01 15:25:06
● 2015-12-30 00:28:24
○ 2016-07-26 21:45:32
○ 2026-07-30 22:21:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, d.gtld-servers.net, c.gtld-servers.net, h.gtld-servers.net...	-
21cs.com	ns-589.awsdns-09.net, ns-487.awsdns-60.com, ns-1645.awsdns-13.co.uk, ns-1124.awsdns-12.org	2 records

✅ Authoritative Response

Server:205.251.196.100

NS records: ns-589.awsdns-09.net, ns-487.awsdns-60.com, ns-1645.awsdns-13.co.uk, ns-1124.awsdns-12.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21cs.com (unsigned zone)

⏱️ Timing

Total: 471ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`199.60.103.49, 199.60.103.149`
NS	4	`ns-1124.awsdns-12.org, ns-1645.awsdns-13.co.uk...`
MX	1	`21cs-com.mail.protection.outlook.com (pr`
TXT	4	`anthropic-domain-verification-prcnwk=0zn, atlassian-domain-verification=xMSlwRaB5w...`
SOA	1	`ns-487.awsdns-60.com awsdns-hostmaster.a`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-487.awsdns-60.com, ns-487.awsdns-60.com)

Analysis

Hierarchy

21cs.com is a parent domain of www.21cs.com.

IP Addresses

21cs.com resolves to the IP addresses 199.60.103.49 and 199.60.103.149

Among the host names that share IP numbers with 21cs.com are emhub.io, interneer.com, simplesolve.com and two others.

Name Servers

The domain 21cs.com is delegated to these four name servers: ns-487.awsdns-60.com, ns-589.awsdns-09.net, ns-1124.awsdns-12.org and ns-1645.awsdns-13.co.uk.

21cs.com shares at least some of its name servers with other domains, including dr3h9ie8o82x1.cloudfront.net, vandanatravels.co, d1dlrsjxqn5nwj.cloudfront.net and two others.

The host names ns-487.awsdns-60.com, ns-589.awsdns-09.net, ns-1124.awsdns-12.org and ns-1645.awsdns-13.co.uk each resolve to two IP addresses: ns-487.awsdns-60.com resolves to 205.251.193.231 and 2600:9000:5301:e700::1; ns-589.awsdns-09.net resolves to 205.251.194.77 and 2600:9000:5302:4d00::1; ns-1124.awsdns-12.org resolves to 205.251.196.100 and 2600:9000:5304:6400::1; ns-1645.awsdns-13.co.uk resolves to 205.251.198.109 and 2600:9000:5306:6d00::1.

Mail Servers

21cs.com routes its mail through a single mail server, 21cs-com.mail.protection.outlook.com.

The host 21cs-com.mail.protection.outlook.com directs to four IP numbers: 52.101.9.11, 52.101.10.5, 52.101.11.9 and 52.101.194.15.