`21cnemail.com`

DNSSEC	⚠️ Not signed
A	192.3.219.139^{🇺🇸 Colocrossing-AS192.3.218.0/23}
		PTR	`192-3-219-139-host.colocrossing.com`
NS	`dns1.registrar-servers.com` ⭐
		A	2610:a1:1024::200^{🇺🇸 MAINT-ID-120082610:a1:1024::/48 Neustar}
			PTR	`dns1.namecheaphosting.com`
			PTR	`dns1.registrar-servers.com`
		A	156.154.132.200^{🇺🇸 MAINT-ID-12008156.154.132.0/24 Neustar}
			PTR	`dns1.namecheaphosting.com`
			PTR	`dns1.registrar-servers.com`
NS	`dns2.registrar-servers.com`
		A	2610:a1:1025::200^{🇺🇸 MAINT-ID-120082610:a1:1025::/48 Neustar}
			PTR	`dns2.namecheaphosting.com`
			PTR	`dns2.registrar-servers.com`
		A	156.154.133.200^{🇺🇸 MAINT-ID-12008156.154.133.0/24 Neustar}
			PTR	`dns2.namecheaphosting.com`
			PTR	`dns2.registrar-servers.com`
MX	`21cnemail.com` ⭐
		A	192.3.219.139^{🇺🇸 Colocrossing-AS192.3.218.0/23}
			PTR	`192-3-219-139-host.colocrossing.com`
TXT	`v=spf1 ip4:192.3.219.139 -all`
SOA	`dns1.registrar-servers.com`hostmaster@registrar-servers.com serial=1772533604

`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=1778369671

MX for

21cnemail.com

Same first word

21cnemail.com

DNS History

6 records (4 active, 2 former)

○NS(root)2015-06-11 → 2017-03-17 · 3 obs

● 2015-06-11 22:02:02
● 2017-03-17 12:04:02
○ 2026-05-09 23:44:42

●NSdns1.registrar-servers.com2026-05-09 → 2026-05-09 · 2 obs

○ 2017-03-17 12:04:02
● 2026-05-09 23:44:42

●NSdns2.registrar-servers.com2026-05-09 → 2026-05-09 · 2 obs

○ 2017-03-17 12:04:02
● 2026-05-09 23:44:42

●MX21cnemail.com2026-05-09 → 2026-05-09 · 1 obs

● 2026-05-09 23:44:42

○A127.0.0.12026-05-09 → 2026-05-09 · 1 obs

○ 2026-05-09 23:44:42

●A192.3.219.1392026-05-09 → 2026-05-09 · 1 obs

● 2026-05-09 23:44:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	f.gtld-servers.net, i.gtld-servers.net, e.gtld-servers.net, m.gtld-servers.net...	-
21cnemail.com	dns1.registrar-servers.com, dns2.registrar-servers.com	4 records

✅ Authoritative Response

Server:156.154.133.200

NS records: dns1.registrar-servers.com, dns2.registrar-servers.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 255ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`192.3.219.139`
NS	2	`dns1.registrar-servers.com, dns2.registrar-servers.com`
MX	1	`21cnemail.com (pri: 10)`
TXT	1	`v=spf1 ip4:192.3.219.139 -all`
SOA	1	`dns1.registrar-servers.com hostmaster.re`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (dns1.registrar-servers.com, dns1.registrar-servers.com, dns2.registrar-servers.com...)

Analysis

Mail Server Role

21cnemail.com serves as the mail server for 21cnemail.com.

IP Addresses

21cnemail.com resolves to one IP number: 192.3.219.139.

Other host names including 301-wz676.over-thewall.com, amr.crm.avanadeonline.com, 9448.com and dowuat.portal.avanadeonline.com share IP numbers with 21cnemail.com.

Name Servers

21cnemail.com's delegation uses two name servers: dns1.registrar-servers.com and dns2.registrar-servers.com.

21cnemail.com uses the same name server setup as other domains, such as petek.ca, denti-strength.com, strandedbytes.com, ninabanana.com and achmeaverzekeringen.com.

21cnemail.com at least partially shares name servers with other domains, including wellbook.me, corenews.net, vegbooks.net, blueprograms.com and parlaye.com.

These name servers are commonly used with dns3.registrar-servers.com, dns4.registrar-servers.com and dns5.registrar-servers.com.

Host names with two IPs:

dns1.registrar-servers.com points to 2610:a1:1024::200 and 156.154.132.200

dns2.registrar-servers.com points to 2610:a1:1025::200 and 156.154.133.200

Mail Servers

21cnemail.com is handled by a single mail server, 21cnemail.com.

Host name 21cnemail.com resolves to a single IP: 192.3.219.139.

21cnemail.com - robtex.com

21cnemail.com

com