`17bigstudy.com`

DNSSEC	⚠️ Not signed
NS	`dns27.hichina.com` ⭐
		A	2408:4009:501::35^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.39^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.59^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.199^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.219^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.39^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.59^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.99^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	139.224.142.109^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
NS	`dns28.hichina.com`
		A	2408:4009:501::36^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.37^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.62^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.197^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.221^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.37^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.62^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.102^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	139.224.142.107^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
MX	`mx.ym.163.com` ⭐
		A	111.124.200.35^{🇨🇳 CHINANET-Guizhou-Guian-IDC111.124.192.0/19}
TXT	`v=spf1 include:spf.163.com ~all`
SOA	`dns27.hichina.com`hostmaster@hichina.com 2026-01-09 #13

`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=1778793506

Same first word

17bigstudy.com

DNS History

8 records (3 active, 5 former)

○NSdns.bizcn.com2017-07-10 → 2017-07-10 · 4 obs

○ 2016-12-16 03:52:12
● 2017-07-10 18:15:08
○ 2026-03-13 23:03:48
○ 2026-05-14 21:42:32

●NSdns27.hichina.com2026-03-13 → 2026-05-14 · 3 obs

○ 2017-07-10 18:15:08
● 2026-03-13 23:03:48
● 2026-05-14 21:42:32

●NSdns28.hichina.com2026-03-13 → 2026-05-14 · 3 obs

○ 2017-07-10 18:15:08
● 2026-03-13 23:03:48
● 2026-05-14 21:42:32

○NSns13.dns.com.cn2016-12-16 → 2017-07-10 · 4 obs

● 2016-12-16 03:52:12
● 2017-07-10 18:15:08
○ 2026-03-13 23:03:48
○ 2026-05-14 21:42:32

○NSns14.dns.com.cn2016-12-16 → 2017-07-10 · 4 obs

● 2016-12-16 03:52:12
● 2017-07-10 18:15:08
○ 2026-03-13 23:03:48
○ 2026-05-14 21:42:32

○NSns2.dns.com.cn2016-12-16 → 2016-12-16 · 3 obs

● 2016-12-16 03:52:12
○ 2017-07-10 18:15:08
○ 2026-05-14 21:42:32

●MXmx.ym.163.com2026-03-13 → 2026-05-14 · 2 obs

● 2026-03-13 23:03:48
● 2026-05-14 21:42:32

○A219.232.253.1212017-07-10 → 2017-07-10 · 3 obs

● 2017-07-10 18:15:08
○ 2026-03-13 23:03:48
○ 2026-05-14 21:42:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	k.gtld-servers.net, g.gtld-servers.net, m.gtld-servers.net, b.gtld-servers.net...	-
17bigstudy.com	dns27.hichina.com, dns28.hichina.com	18 records

✅ Authoritative Response

Server:120.76.107.39

NS records: dns27.hichina.com, dns28.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 17bigstudy.com (unsigned zone)

⏱️ Timing

Total: 634ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`dns27.hichina.com, dns28.hichina.com`
MX	1	`mx.ym.163.com (pri: 10)`
TXT	1	`v=spf1 include:spf.163.com ~all`
SOA	1	`dns27.hichina.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns27.hichina.com, dns27.hichina.com, dns27.hichina.com...)

Analysis

Name Servers

Two name servers dns27.hichina.com and dns28.hichina.com handle the delegation for 17bigstudy.com.

17bigstudy.com shares the same name server setup as other domains, for instance sukean.com, eduu.com, aionix.hk, earth-shield.com and xpspeed.net.

17bigstudy.com at least partially shares name servers with other domains, for instance sunyk.cn, mnsj.cn, drjar.net, moxishangye.com and uqrco.luxe.

These name servers are commonly used with the following: expirens3.hichina.com, expirens4.hichina.com, ns1.alidns.com and ns2.alidns.com.

Host names with nine IP numbers:

dns27.hichina.com points to: 2408:4009:501::35, 39.96.153.39, 39.96.153.59, 47.118.199.199, 47.118.199.219, 120.76.107.39, 120.76.107.59, 139.224.142.99 and 139.224.142.109.

dns28.hichina.com points to: 2408:4009:501::36, 39.96.153.37, 39.96.153.62, 47.118.199.197, 47.118.199.221, 120.76.107.37, 120.76.107.62, 139.224.142.102 and 139.224.142.107.

Mail Servers

17bigstudy.com is handled by a single mail server, mx.ym.163.com.

17bigstudy.com uses the same mail server setup as other domains, for instance songzhanhui.com, irohedp.com, hxsew.net, zsb.com and xyhu.net.

17bigstudy.com shares at least partially some mail servers with other domains, for instance huayueyinye.com, huiyongxin.com, lannpoo.com, showerdoor-cn.com and szdoe.com.

Mail servers are commonly used alongside mx1.qiye.aliyun.com, mx2.qiye.aliyun.com and mx3.qiye.aliyun.com.

The host name mx.ym.163.com points to IP 111.124.200.35.

17bigstudy.com - robtex.com

17bigstudy.com

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