17bigstudy.com - dns.ninja

`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 2026-01-12 #9

`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=1781469925

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
○ 2026-06-14 20:47:34

●NSdns27.hichina.com2026-03-13 → 2026-06-14 · 3 obs

○ 2017-07-10 18:15:08
● 2026-03-13 23:03:48
● 2026-06-14 20:47:34

●NSdns28.hichina.com2026-03-13 → 2026-06-14 · 3 obs

○ 2017-07-10 18:15:08
● 2026-03-13 23:03:48
● 2026-06-14 20:47:34

○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
○ 2026-06-14 20:47:34

○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
○ 2026-06-14 20:47:34

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

● 2016-12-16 03:52:12
○ 2017-07-10 18:15:08
○ 2026-06-14 20:47:34

●MXmx.ym.163.com2026-03-13 → 2026-06-14 · 2 obs

● 2026-03-13 23:03:48
● 2026-06-14 20:47:34

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

● 2017-07-10 18:15:08
○ 2026-03-13 23:03:48
○ 2026-06-14 20:47:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
17bigstudy.com	dns27.hichina.com, dns28.hichina.com	18 records

✅ Authoritative Response

Server:120.76.107.37

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 1192ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`dns28.hichina.com, dns27.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 handle the delegation for 17bigstudy.com: dns27.hichina.com and dns28.hichina.com.

The name server configuration of 17bigstudy.com is shared with other domains, for instance sukean.com, eduu.com, aionix.hk and two others.

17bigstudy.com partially shares its NS delegation with several other domains, including mnsj.cn, drjar.net, niubier.com and two others.

The name servers expirens3.hichina.com, expirens4.hichina.com, ns1.alidns.com and ns2.alidns.com are often found in use alongside these name servers.

Hosts with 9 IP addresses each:

dns27.hichina.com resolves to 39.96.153.39, 39.96.153.59 and 47.118.199.199 among others, with 6 other IP addresses in total.

dns28.hichina.com resolves to 39.96.153.37, 39.96.153.62 and 47.118.199.197 among others, with 6 other IP addresses in total.

Mail Servers

17bigstudy.com uses one mail server — mx.ym.163.com.

The mail server setup of 17bigstudy.com matches that of other domains such as songzhanhui.com, irohedp.com, hxsew.net and two others.

At least some of the mail servers used by 17bigstudy.com are shared with other domains: huayueyinye.com, huiyongxin.com, lannpoo.com and two others among them.

The mail servers mx1.qiye.aliyun.com, mx2.qiye.aliyun.com and mx3.qiye.aliyun.com frequently co-occur with these mail servers.

mx.ym.163.com carries a single IP number, which is 111.124.200.35.