81study.com - dns.ninja

`81study.com`

DNSSEC	⚠️ Not signed
A	156.234.192.42^{🇭🇰 YANCYLIMITED-AS-HK156.234.0.0/16 YANCY LIMITED}
NS	`ns1.myhostadmin.net` ⭐
		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`
		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}
SOA	`ns1.myhostadmin.net`dnsconct@myhostadmin.net 2025-10-13 #3

`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=1783035771

Subdomains

vv.81study.com

Same first word

81study.com

Similar names

study18.com

DNS History

18 records (3 active, 15 former)

○NSlocalhost2020-02-12 → 2020-02-12 · 3 obs

● 2020-02-12 20:00:44
○ 2026-03-08 01:17:38
○ 2026-07-02 23:56:20

●NSns1.myhostadmin.net2026-03-08 → 2026-07-02 · 3 obs

○ 2020-02-12 20:00:44
● 2026-03-08 01:17:38
● 2026-07-02 23:56:20

○NSns1.mytrafficmanagement.com2020-02-12 → 2020-02-12 · 3 obs

● 2020-02-12 20:00:44
○ 2026-03-08 01:17:38
○ 2026-07-02 23:56:20

●NSns2.myhostadmin.net2026-03-08 → 2026-07-02 · 3 obs

○ 2020-02-12 20:00:44
● 2026-03-08 01:17:38
● 2026-07-02 23:56:20

○NSns2.mytrafficmanagement.com2020-02-12 → 2020-02-12 · 3 obs

● 2020-02-12 20:00:44
○ 2026-03-08 01:17:38
○ 2026-07-02 23:56:20

○MXmail.skrimple.com2017-03-22 → 2017-03-22 · 3 obs

● 2017-03-22 17:12:08
○ 2020-02-12 20:00:44
○ 2026-07-02 23:56:20

○A103.232.215.1342016-07-24 → 2016-07-24 · 4 obs

○ 2016-03-27 16:33:22
● 2016-07-24 14:43:00
○ 2017-03-22 17:12:08
○ 2026-07-02 23:56:20

○A123.254.111.1802015-08-23 → 2015-08-23 · 3 obs

● 2015-08-23 08:39:58
○ 2015-12-12 20:34:56
○ 2026-07-02 23:56:20

●A156.234.192.422026-03-08 → 2026-07-02 · 3 obs

○ 2020-02-12 20:00:44
● 2026-03-08 01:17:38
● 2026-07-02 23:56:20

○A198.58.118.1672020-02-12 → 2020-02-12 · 4 obs

○ 2017-03-22 17:12:08
● 2020-02-12 20:00:44
○ 2026-03-08 01:17:38
○ 2026-07-02 23:56:20

○A45.33.2.792020-02-12 → 2020-02-12 · 4 obs

○ 2017-03-22 17:12:08
● 2020-02-12 20:00:44
○ 2026-03-08 01:17:38
○ 2026-07-02 23:56:20

○A45.33.23.1832020-02-12 → 2020-02-12 · 4 obs

○ 2017-03-22 17:12:08
● 2020-02-12 20:00:44
○ 2026-03-08 01:17:38
○ 2026-07-02 23:56:20

○A45.56.79.232020-02-12 → 2020-02-12 · 4 obs

○ 2017-03-22 17:12:08
● 2020-02-12 20:00:44
○ 2026-03-08 01:17:38
○ 2026-07-02 23:56:20

○A45.79.19.1962020-02-12 → 2020-02-12 · 4 obs

○ 2017-03-22 17:12:08
● 2020-02-12 20:00:44
○ 2026-03-08 01:17:38
○ 2026-07-02 23:56:20

○A50.117.113.2192017-03-22 → 2017-03-22 · 4 obs

○ 2016-07-24 14:43:00
● 2017-03-22 17:12:08
○ 2020-02-12 20:00:44
○ 2026-07-02 23:56:20

○A54.244.121.102015-08-23 → 2015-08-23 · 3 obs

● 2015-08-23 08:39:58
○ 2026-03-08 01:17:38
○ 2026-07-02 23:56:20

○A65.19.157.2002015-12-12 → 2016-03-27 · 5 obs

○ 2015-08-23 08:39:58
● 2015-12-12 20:34:56
● 2016-03-27 16:33:22
○ 2016-07-24 14:43:00
○ 2026-07-02 23:56:20

○A96.126.123.2442020-02-12 → 2020-02-12 · 4 obs

○ 2017-03-22 17:12:08
● 2020-02-12 20:00:44
○ 2026-03-08 01:17:38
○ 2026-07-02 23:56:20

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
81study.com	ns1.myhostadmin.net, ns2.myhostadmin.net	-

✅ Authoritative Response

Server:118.123.253.132

NS records: ns1.myhostadmin.net, ns2.myhostadmin.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 81study.com (unsigned zone)

⏱️ Timing

Total: 1988ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`156.234.192.42`
NS	2	`ns1.myhostadmin.net, ns2.myhostadmin.net`
SOA	1	`ns1.myhostadmin.net dnsconct.myhostadmin`

Analysis

Hierarchy

vv.81study.com is a subdomain of 81study.com.

IP Addresses

81study.com has exactly one IP address — 156.234.192.42.

Host names such as vv.81study.com, zjyingxiang.com.cn and cqcsq.com share their IP numbers with 81study.com.

Name Servers

81study.com is delegated to two name servers: ns1.myhostadmin.net and ns2.myhostadmin.net.

The name server configuration of 81study.com is shared with other domains, for instance jyweihu.cn, baby0796.com, lxypfund.com and two others.

The name servers of 81study.com overlap at least partially with those of other domains — among them xiamantech.com, hsflower.com, cssxbzgd.com and two more.

These name servers commonly appear in delegations together with ns4.myhostadmin.net, ns5.myhostadmin.net, ns3.myhostadmin.net and 7 other.

Each of the hosts ns1.myhostadmin.net and ns2.myhostadmin.net has four IP addresses: ns1.myhostadmin.net points to 60.247.150.254, 118.123.249.114, 118.123.253.132 and 240e:d9:c200::2, and ns2.myhostadmin.net points to 61.172.183.73, 61.240.129.143, 211.149.230.100 and 240e:d9:c200:1::2.