`training.21cn.com`

DNSSEC	⚠️ Not signed
MX	`mta-ent.21cn.com` ⭐
		A	183.56.203.132^{🇨🇳 CHINANET-Guangdong-GuangZhouNanFangJiDiWang-IDC183.56.192.0/20 CloudVsp.Inc-HYC-double - GZNFJDW Network unicast}
		A	183.56.205.179^{🇨🇳 CHINANET-Guangdong-GuangZhouNanFangJiDiWang-IDC183.56.192.0/20 CloudVsp.Inc-HYC-double - GZNFJDW Network unicast}

`21cn.com`

	DNSSEC	⚠️ Not signed
	A	240e:980:8100::72d9:250d^{🇨🇳 CHINANET-BACKBONE240e::/20 CHINANET-IPv6-ROUTE}
	A	114.217.37.13^{🇨🇳 CHINANET-BACKBONE114.216.0.0/13 China Telecom Network}
	NS	`vip3.alidns.com` ⭐
	NS	`vip4.alidns.com`
	MX	`mta.21cn.com` ⭐
	TXT	`v=spf1 include:mail-spf.21cn.com include:mail01-spf.21cn.com include:mail02-s...`
	SOA	`vip3.alidns.com`hostmaster@hichina.com 2026-01-07 #11

WOT: SAFE (53/100)
rank #10870 globally
rank #5312 in the tld
WOT: SUSPICIOUS (52/100)
📈 Tranco rank: #8,577

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DNS History

1 record (1 active, 0 former)

●MXmta-ent.21cn.com2015-08-13 → 2026-05-11 · 2 obs

● 2015-08-13 12:45:24
● 2026-05-11 23:42:26

🔍 DNS Trace

Analysis

Mail Servers

training.21cn.com is handled by a single mail server, mta-ent.21cn.com.

training.21cn.com shares its mail server setup with other domains, including yhsa.com.cn, zobn.net, max1-155.guangzhou.gd.cn, ppp76.shantou.gd.cn and correo.21cn.com.

The mail servers for training.21cn.com are shared with other domains, for instance cn-bowico.com, hongli-nb.com, protechsrs.com, povoslife.net and dg-nisshi.com.

these mail servers are commonly used alongside the mail servers mailcdn.21cn.com.

mta-ent.21cn.com points to two IPs: 183.56.203.132 and 183.56.205.179.

training.21cn.com - robtex.com