root.21cn.com - robtex.com

root.21cn.com

DNSSEC⚠️ Not signed
MXmta-ent.21cn.com ⭐
A183.56.203.132🇨🇳 CHINANET-Guangdong-GuangZhouNanFangJiDiWang-IDC183.56.192.0/20 CloudVsp.Inc-HYC-double - GZNFJDW Network unicast
A183.56.205.179🇨🇳 CHINANET-Guangdong-GuangZhouNanFangJiDiWang-IDC183.56.192.0/20 CloudVsp.Inc-HYC-double - GZNFJDW Network unicast

21cn.com

DNSSEC⚠️ Not signed
A240e:980:8100::72d9:250d🇨🇳 CHINANET-BACKBONE240e::/20 CHINANET-IPv6-ROUTE
A114.217.37.13🇨🇳 CHINANET-BACKBONE114.216.0.0/13 China Telecom Network
NSvip3.alidns.com ⭐
NSvip4.alidns.com
MXmta.21cn.com ⭐
TXTv=spf1 include:mail-spf.21cn.com include:mail01-spf.21cn.com include:mail02-s...
SOAvip3.alidns.comhostmaster@hichina.com 2026-01-07 #16
WOT: SAFE (53/100)
rank #10639 globally
rank #5258 in the tld
WOT: SUSPICIOUS (52/100)
📈 Tranco rank: #7,713

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DNS History

1 record (1 active, 0 former)

20192020202120222023202420252026MXmta-ent.21cn.com
●MXmta-ent.21cn.com2018-11-20 → 2026-03-25 · 2 obs
● 2018-11-20 01:19:24
● 2026-03-25 02:43:02

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comj.gtld-servers.net, l.gtld-servers.net, h.gtld-servers.net, a.gtld-servers.net...-
21cn.comvip3.alidns.com, vip4.alidns.com22 records

✅ Authoritative Response

Server:121.40.6.164

NS records: vip3.alidns.com, vip4.alidns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 3733ms | Queries: -

📄 Records

TypeCountSample Data
MX1mta-ent.21cn.com (pri: 10)

📌 Glue Records Collected

Total: 22

Out-of-bailiwick: 22 (vip3.alidns.com, vip3.alidns.com, vip3.alidns.com...)

Analysis

Mail Servers

A single mail server handles root.21cn.com, mta-ent.21cn.com.

root.21cn.com shares the same mail server setup as other domains, for instance czgjsy.cn, ppp55.zhuhai.gd.cn, mta.meizhou.gd.cn, vip-mta.21cn.com and gembird.com.

root.21cn.com shares at least some mail servers with other domains, for example lmexcel.com, foundmed.com.cn, virsports.com, utaxzs.com.cn and yz-solarenergy.com.

These mail servers are often used together with the mail servers mailcdn.21cn.com.

The host name mta-ent.21cn.com resolves to two IP numbers: 183.56.203.132 and 183.56.205.179.