`51doors.com`

DNSSEC	⚠️ Not signed
A	211.149.234.242^{🇨🇳 CHINANET-SCIDC-AS-AP211.149.224.0/19 chinanet SC province network-client}
NS	`ns1.myhostadmin.net` ⭐ ⚠️ Not in parent delegation
		A	240e:d9:c200::2^{🇨🇳 CHINANET-SCIDC-AS-AP240e:d9:c000::/36 SICHUANIDC province network}
		A	60.247.150.254^{🇨🇳 CHINANET-SCIDC-AS-AP60.247.128.0/18 SICHUANIDC province network}
		A	118.123.249.114^{🇨🇳 CHINANET-SCIDC-AS-AP118.123.240.0/20 CHINANET SiChuan Telecom Internet Data Center}
		A	118.123.253.132^{🇨🇳 CHINANET-SCIDC-AS-AP118.123.240.0/20 CHINANET SiChuan Telecom Internet Data Center}
NS	`ns2.myhostadmin.net` ⚠️ Not in parent delegation
		A	240e:d9:c200:1::2^{🇨🇳 CHINANET-SCIDC-AS-AP240e:d9:c000::/36 SICHUANIDC province network}
		A	61.172.183.73^{🇨🇳 SHANGHAITELECOM61.172.182.0/23 SHIDC}
		A	61.240.129.143^{🇨🇳 CHINA169-Backbone61.240.128.0/19 CMI (Customer Route)}
		A	211.149.230.100^{🇨🇳 CHINANET-SCIDC-AS-AP211.149.224.0/19 chinanet SC province network-client}
NS	`ns3.myhostadmin.net` ⚠️ Not in parent delegation
		A	240e:d9:c200::2^{🇨🇳 CHINANET-SCIDC-AS-AP240e:d9:c000::/36 SICHUANIDC province network}
		A	61.172.183.77^{🇨🇳 SHANGHAITELECOM61.172.182.0/23 SHIDC}
		A	118.123.249.114^{🇨🇳 CHINANET-SCIDC-AS-AP118.123.240.0/20 CHINANET SiChuan Telecom Internet Data Center}
NS	`ns4.myhostadmin.net`
		A	240e:d9:c200:1::2^{🇨🇳 CHINANET-SCIDC-AS-AP240e:d9:c000::/36 SICHUANIDC province network}
		A	118.123.253.132^{🇨🇳 CHINANET-SCIDC-AS-AP118.123.240.0/20 CHINANET SiChuan Telecom Internet Data Center}
		A	211.149.230.100^{🇨🇳 CHINANET-SCIDC-AS-AP211.149.224.0/19 chinanet SC province network-client}
NS	`ns5.myhostadmin.net`
		A	240e:d9:c200::2^{🇨🇳 CHINANET-SCIDC-AS-AP240e:d9:c000::/36 SICHUANIDC province network}
		A	61.172.183.73^{🇨🇳 SHANGHAITELECOM61.172.182.0/23 SHIDC}
		A	118.123.249.114^{🇨🇳 CHINANET-SCIDC-AS-AP118.123.240.0/20 CHINANET SiChuan Telecom Internet Data Center}
NS	`ns6.myhostadmin.net` ⚠️ Not in parent delegation
		A	240e:d9:c200:1::2^{🇨🇳 CHINANET-SCIDC-AS-AP240e:d9:c000::/36 SICHUANIDC province network}
		A	60.247.150.13^{🇨🇳 CHINANET-SCIDC-AS-AP60.247.128.0/18 SICHUANIDC province network}
		A	118.123.253.132^{🇨🇳 CHINANET-SCIDC-AS-AP118.123.240.0/20 CHINANET SiChuan Telecom Internet Data Center}
SOA	`ns1.myhostadmin.net`dnsconct@myhostadmin.net 2020-03-05 #11

`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=1785510377

Same first word

51doors.com

DNS History

17 records (7 active, 10 former)

●NSns1.myhostadmin.net2020-03-30 → 2026-07-31 · 7 obs

○ 2017-03-15 07:55:38
● 2020-03-30 03:07:58
○ 2026-07-19 07:42:52
● 2026-07-19 09:42:20
○ 2026-07-19 11:53:50
● 2026-07-19 12:27:22
● 2026-07-31 15:12:18

○NSns11.xincache.com2015-07-20 → 2016-06-21 · 4 obs

● 2015-07-20 16:46:42
● 2016-06-21 07:29:30
○ 2017-03-15 07:55:38
○ 2026-07-31 15:12:18

○NSns12.xincache.com2015-07-20 → 2016-06-21 · 4 obs

● 2015-07-20 16:46:42
● 2016-06-21 07:29:30
○ 2017-03-15 07:55:38
○ 2026-07-31 15:12:18

○NSns15.xincache.com2015-07-20 → 2016-06-21 · 4 obs

● 2015-07-20 16:46:42
● 2016-06-21 07:29:30
○ 2017-03-15 07:55:38
○ 2026-07-31 15:12:18

○NSns16.xincache.com2015-07-20 → 2016-06-21 · 4 obs

● 2015-07-20 16:46:42
● 2016-06-21 07:29:30
○ 2017-03-15 07:55:38
○ 2026-07-31 15:12:18

○NSns19.xincache.com2017-03-15 → 2017-03-15 · 4 obs

○ 2016-06-21 07:29:30
● 2017-03-15 07:55:38
○ 2020-03-30 03:07:58
○ 2026-07-31 15:12:18

●NSns2.myhostadmin.net2020-03-30 → 2026-07-31 · 7 obs

○ 2017-03-15 07:55:38
● 2020-03-30 03:07:58
○ 2026-07-19 07:42:52
● 2026-07-19 09:42:20
○ 2026-07-19 11:53:50
● 2026-07-19 12:27:22
● 2026-07-31 15:12:18

○NSns20.xincache.com2017-03-15 → 2017-03-15 · 4 obs

○ 2016-06-21 07:29:30
● 2017-03-15 07:55:38
○ 2020-03-30 03:07:58
○ 2026-07-31 15:12:18

●NSns3.myhostadmin.net2020-03-30 → 2026-07-31 · 7 obs

○ 2017-03-15 07:55:38
● 2020-03-30 03:07:58
○ 2026-07-19 07:42:52
● 2026-07-19 09:42:20
○ 2026-07-19 11:53:50
● 2026-07-19 12:27:22
● 2026-07-31 15:12:18

●NSns4.myhostadmin.net2020-03-30 → 2026-07-31 · 3 obs

○ 2017-03-15 07:55:38
● 2020-03-30 03:07:58
● 2026-07-31 15:12:18

●NSns5.myhostadmin.net2020-03-30 → 2026-07-31 · 3 obs

○ 2017-03-15 07:55:38
● 2020-03-30 03:07:58
● 2026-07-31 15:12:18

●NSns6.myhostadmin.net2020-03-30 → 2026-07-31 · 7 obs

○ 2017-03-15 07:55:38
● 2020-03-30 03:07:58
○ 2026-07-19 07:42:52
● 2026-07-19 09:42:20
○ 2026-07-19 11:53:50
● 2026-07-19 12:27:22
● 2026-07-31 15:12:18

○MXmxdomain.qq.com2015-07-20 → 2017-03-15 · 4 obs

● 2015-07-20 16:46:42
● 2017-03-15 07:55:38
○ 2020-03-30 03:07:58
○ 2026-07-31 15:12:18

○A118.123.17.2262015-07-20 → 2015-07-20 · 3 obs

● 2015-07-20 16:46:42
○ 2015-11-21 20:41:48
○ 2026-07-31 15:12:18

○A192.69.210.2462015-11-21 → 2015-11-21 · 4 obs

○ 2015-07-20 16:46:42
● 2015-11-21 20:41:48
○ 2016-02-26 14:44:42
○ 2026-07-31 15:12:18

○A211.149.228.482016-02-26 → 2017-03-15 · 5 obs

○ 2015-11-21 20:41:48
● 2016-02-26 14:44:42
● 2017-03-15 07:55:38
○ 2020-03-30 03:07:58
○ 2026-07-31 15:12:18

●A211.149.234.2422020-03-30 → 2026-07-31 · 7 obs

○ 2017-03-15 07:55:38
● 2020-03-30 03:07:58
○ 2026-07-19 07:42:52
● 2026-07-19 09:42:20
○ 2026-07-19 11:53:50
● 2026-07-19 12:27:22
● 2026-07-31 15:12:18

🔍 DNS Trace

Analysis

IP Addresses

51doors.com resolves to one IP address: 211.149.234.242.

tjdsmt.com, s-440640.gotocdn.com, jfrschool.com and two other host names share IP numbers with 51doors.com.

Name Servers

51doors.com is delegated to 6 name servers: ns1.myhostadmin.net, ns2.myhostadmin.net, ns3.myhostadmin.net and 3 other.

51doors.com partially shares its NS delegation with several other domains, including cntom.com.cn, axuksxm.cn, 365zl.com and two others.

In DNS configurations, these name servers often share authority with ns4.myhostadmin.net, ns5.myhostadmin.net, ns6.myhostadmin.net and 6 other name servers.

Hosts that point to four IP numbers:

ns1.myhostadmin.net maps to the following IP addresses: 60.247.150.254, 118.123.249.114, 118.123.253.132 and 240e:d9:c200::2.

ns2.myhostadmin.net maps to the following IP addresses: 61.172.183.73, 61.240.129.143, 211.149.230.100 and 240e:d9:c200:1::2.

Hostnames that resolve to three IP addresses:

ns3.myhostadmin.net points to 61.172.183.77, 118.123.249.114 and 240e:d9:c200::2.

ns4.myhostadmin.net points to 118.123.253.132, 211.149.230.100 and 240e:d9:c200:1::2.

ns5.myhostadmin.net points to 61.172.183.73, 118.123.249.114 and 240e:d9:c200::2.

ns6.myhostadmin.net points to 60.247.150.13, 118.123.253.132 and 240e:d9:c200:1::2.

The host names ns1.myhostadmin.net, ns3.myhostadmin.net and ns5.myhostadmin.net each resolve to 240e:d9:c200::2.

The host names ns1.myhostadmin.net, ns3.myhostadmin.net and ns5.myhostadmin.net each resolve to 118.123.249.114.

The host names ns1.myhostadmin.net, ns4.myhostadmin.net and ns6.myhostadmin.net each resolve to 118.123.253.132.

The host names ns2.myhostadmin.net, ns4.myhostadmin.net and ns6.myhostadmin.net each resolve to 240e:d9:c200:1::2.