it.21cn.com - robtex.com

it.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 #11
WOT: SAFE (64/100)
rank #10573 globally
rank #5201 in the tld
WOT: SUSPICIOUS (52/100)
📈 Tranco rank: #8,166

Same first word

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it.com.vn
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Similar names

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ti.solutions
it.na
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it.fage
it.abbott

DNS History

29 records (1 active, 28 former)

20162017201820192020202120222023202420252026MXmta-ent.21cn.comA115.231.128.181115.231.128.186183.136.218.183183.136.218.184183.136.218.220183.136.218.221203.130.53.126203.130.53.14203.130.53.15203.130.53.18220.243.235.201220.243.237.15458.222.17.358.222.17.4858.222.24.3658.222.24.4058.222.24.4858.222.24.5063.159.216.112CNAME08911.xdwscache.ourwebpic.com21sj.xdwscache.ourwebpic.comalldomain.21cn.com.fastcdn.comit.21cn.com.cdn20.comit.cdnv.21cn.comit.cdny.21cn.comxnop029.tlgslb.comxnop036.fastcdn.comxnop036.tlgslb.com
●MXmta-ent.21cn.com2026-03-24 → 2026-04-06 · 2 obs
● 2026-03-24 09:34:06
● 2026-04-06 03:03:06
○A115.231.128.1812015-12-17 → 2016-01-11 · 5 obs
○ 2015-10-26 14:42:32
● 2015-12-17 10:32:32
● 2016-01-11 18:16:46
○ 2016-05-10 14:09:26
○ 2026-04-06 03:03:06
○A115.231.128.1862015-12-17 → 2016-01-11 · 5 obs
○ 2015-10-26 14:42:32
● 2015-12-17 10:32:32
● 2016-01-11 18:16:46
○ 2016-05-10 14:09:26
○ 2026-04-06 03:03:06
○A183.136.218.1832015-12-17 → 2016-01-11 · 5 obs
○ 2015-10-26 14:42:32
● 2015-12-17 10:32:32
● 2016-01-11 18:16:46
○ 2016-05-10 14:09:26
○ 2026-04-06 03:03:06
○A183.136.218.1842015-12-17 → 2016-01-11 · 5 obs
○ 2015-10-26 14:42:32
● 2015-12-17 10:32:32
● 2016-01-11 18:16:46
○ 2016-05-10 14:09:26
○ 2026-04-06 03:03:06
○A183.136.218.2202015-12-17 → 2016-01-11 · 5 obs
○ 2015-10-26 14:42:32
● 2015-12-17 10:32:32
● 2016-01-11 18:16:46
○ 2016-05-10 14:09:26
○ 2026-04-06 03:03:06
○A183.136.218.2212015-12-17 → 2016-01-11 · 5 obs
○ 2015-10-26 14:42:32
● 2015-12-17 10:32:32
● 2016-01-11 18:16:46
○ 2016-05-10 14:09:26
○ 2026-04-06 03:03:06
○A203.130.53.1262016-06-20 → 2016-06-20 · 4 obs
○ 2016-05-24 17:37:42
● 2016-06-20 19:57:02
○ 2016-08-08 10:04:54
○ 2026-04-06 03:03:06
○A203.130.53.142016-05-24 → 2016-05-24 · 4 obs
○ 2016-05-10 14:09:26
● 2016-05-24 17:37:42
○ 2016-06-20 19:57:02
○ 2026-04-06 03:03:06
○A203.130.53.152016-05-24 → 2016-05-24 · 4 obs
○ 2016-05-10 14:09:26
● 2016-05-24 17:37:42
○ 2016-06-20 19:57:02
○ 2026-04-06 03:03:06
○A203.130.53.182016-05-24 → 2016-05-24 · 4 obs
○ 2016-05-10 14:09:26
● 2016-05-24 17:37:42
○ 2016-06-20 19:57:02
○ 2026-04-06 03:03:06
○A220.243.235.2012016-08-08 → 2017-01-04 · 5 obs
○ 2016-06-20 19:57:02
● 2016-08-08 10:04:54
● 2017-01-04 11:45:52
○ 2026-03-24 09:34:06
○ 2026-04-06 03:03:06
○A220.243.237.1542016-08-08 → 2017-01-04 · 5 obs
○ 2016-06-20 19:57:02
● 2016-08-08 10:04:54
● 2017-01-04 11:45:52
○ 2026-03-24 09:34:06
○ 2026-04-06 03:03:06
○A58.222.17.32015-05-10 → 2015-05-10 · 3 obs
● 2015-05-10 23:23:54
○ 2026-03-24 09:34:06
○ 2026-04-06 03:03:06
○A58.222.17.482015-05-10 → 2015-05-10 · 3 obs
● 2015-05-10 23:23:54
○ 2026-03-24 09:34:06
○ 2026-04-06 03:03:06
○A58.222.24.362015-10-17 → 2015-10-26 · 5 obs
○ 2015-05-10 23:23:54
● 2015-10-17 02:28:16
● 2015-10-26 14:42:32
○ 2015-12-17 10:32:32
○ 2026-04-06 03:03:06
○A58.222.24.402015-05-10 → 2015-05-10 · 3 obs
● 2015-05-10 23:23:54
○ 2026-03-24 09:34:06
○ 2026-04-06 03:03:06
○A58.222.24.482015-10-17 → 2015-10-26 · 5 obs
○ 2015-05-10 23:23:54
● 2015-10-17 02:28:16
● 2015-10-26 14:42:32
○ 2015-12-17 10:32:32
○ 2026-04-06 03:03:06
○A58.222.24.502015-05-10 → 2015-05-10 · 3 obs
● 2015-05-10 23:23:54
○ 2026-03-24 09:34:06
○ 2026-04-06 03:03:06
○A63.159.216.1122016-05-10 → 2016-05-10 · 4 obs
○ 2016-01-11 18:16:46
● 2016-05-10 14:09:26
○ 2016-05-24 17:37:42
○ 2026-04-06 03:03:06
○CNAME08911.xdwscache.ourwebpic.com2016-03-22 → 2016-06-20 · 5 obs
○ 2016-01-11 18:16:46
● 2016-03-22 20:01:52
● 2016-06-20 19:57:02
○ 2016-08-08 10:04:54
○ 2026-04-06 03:03:06
○CNAME21sj.xdwscache.ourwebpic.com2016-08-08 → 2017-01-04 · 5 obs
○ 2016-06-20 19:57:02
● 2016-08-08 10:04:54
● 2017-01-04 11:45:52
○ 2026-03-24 09:34:06
○ 2026-04-06 03:03:06
○CNAMEalldomain.21cn.com.fastcdn.com2015-10-17 → 2016-01-11 · 5 obs
○ 2015-05-10 23:23:54
● 2015-10-17 02:28:16
● 2016-01-11 18:16:46
○ 2016-03-22 20:01:52
○ 2026-04-06 03:03:06
○CNAMEit.21cn.com.cdn20.com2016-03-22 → 2017-01-04 · 5 obs
○ 2016-01-11 18:16:46
● 2016-03-22 20:01:52
● 2017-01-04 11:45:52
○ 2026-03-24 09:34:06
○ 2026-04-06 03:03:06
○CNAMEit.cdnv.21cn.com2016-03-22 → 2017-01-04 · 5 obs
○ 2016-01-11 18:16:46
● 2016-03-22 20:01:52
● 2017-01-04 11:45:52
○ 2026-03-24 09:34:06
○ 2026-04-06 03:03:06
○CNAMEit.cdny.21cn.com2015-05-10 → 2016-01-11 · 4 obs
● 2015-05-10 23:23:54
● 2016-01-11 18:16:46
○ 2016-03-22 20:01:52
○ 2026-04-06 03:03:06
○CNAMExnop029.tlgslb.com2015-12-17 → 2016-01-11 · 5 obs
○ 2015-10-26 14:42:32
● 2015-12-17 10:32:32
● 2016-01-11 18:16:46
○ 2016-03-22 20:01:52
○ 2026-04-06 03:03:06
○CNAMExnop036.fastcdn.com2015-10-17 → 2015-10-26 · 5 obs
○ 2015-05-10 23:23:54
● 2015-10-17 02:28:16
● 2015-10-26 14:42:32
○ 2015-12-17 10:32:32
○ 2026-04-06 03:03:06
○CNAMExnop036.tlgslb.com2015-10-17 → 2015-10-26 · 5 obs
○ 2015-05-10 23:23:54
● 2015-10-17 02:28:16
● 2015-10-26 14:42:32
○ 2015-12-17 10:32:32
○ 2026-04-06 03:03:06

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.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: 492ms | 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

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

it.21cn.com shares its mail server setup with other domains, including cecf-exbit.guangzhou.gd.cn, max1-197.guangzhou.gd.cn, cn.htmlinfocnpublic.yangjiang.gd.cn, max1-223.guangzhou.gd.cn and img04bak.21cn.com.

The mail servers for it.21cn.com are shared with other domains, for instance wbseal.com, true-magic.net, sakirana.com, citcc.cn and plwinch.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.