`51jo.cn`

DNSSEC	⚠️ Not signed
NS	`dns9.hichina.com` ⭐
		A	2408:4009:501::17^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.42^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.52^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.202^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.212^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.42^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.52^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.112^{🇨🇳 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	139.224.142.122^{🇨🇳 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	`dns10.hichina.com`
		A	2408:4009:501::18^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.41^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.51^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.201^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.211^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.41^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.51^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.111^{🇨🇳 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	139.224.142.121^{🇨🇳 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	`mxbiz1.qq.com` ⭐
MX	`mxbiz2.qq.com`⁽¹⁰⁾
SOA	`dns9.hichina.com`hostmaster@hichina.com 2026-01-12 #9

`cn`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.dns.cn` ⭐
	NS	`b.dns.cn`
	NS	`c.dns.cn`
	NS	`d.dns.cn`
	NS	`e.dns.cn`
	NS	`ns.cernet.net` ⚠️ Not in parent delegation
	SOA	`a.dns.cn`root@cnnic.cn serial=2034663972

Same first word

51jo.cn

Similar names

oj15.com

51oj.com

oj51.com

DNS History

5 records (4 active, 1 former)

●NSdns10.hichina.com2015-06-07 → 2026-04-13 · 2 obs

● 2015-06-07 02:32:44
● 2026-04-13 00:06:38

●NSdns9.hichina.com2015-06-07 → 2026-04-13 · 2 obs

● 2015-06-07 02:32:44
● 2026-04-13 00:06:38

●MXmxbiz1.qq.com2016-11-09 → 2026-04-13 · 2 obs

● 2016-11-09 03:41:02
● 2026-04-13 00:06:38

●MXmxbiz2.qq.com2016-11-09 → 2026-04-13 · 2 obs

● 2016-11-09 03:41:02
● 2026-04-13 00:06:38

○A115.47.153.962015-06-07 → 2016-04-18 · 4 obs

● 2015-06-07 02:32:44
● 2016-04-18 04:50:56
○ 2016-11-09 03:41:02
○ 2026-04-13 00:06:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn...	-
51jo.cn	dns9.hichina.com, dns10.hichina.com	-

✅ Authoritative Response

Server:47.118.199.211

NS records: dns9.hichina.com, dns10.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 51jo.cn (unsigned zone)

⏱️ Timing

Total: 4916ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`dns10.hichina.com, dns9.hichina.com`
MX	2	`mxbiz2.qq.com (pri: 10), mxbiz1.qq.com (pri: 5)`
SOA	1	`dns9.hichina.com hostmaster.hichina.com`

Analysis

Name Servers

51jo.cn is delegated to two name servers: dns10.hichina.com and dns9.hichina.com.

51jo.cn shares the same name server setup as other domains, for example cglw.com, zhichubao.com, yukaseals.com, xxiazai.com and chedamai.com.

51jo.cn partially shares name servers with other domains, for instance jmsdhg.com, onenine.com.cn and wbit.org.

Host names with nine IP numbers:

dns10.hichina.com points to: 2408:4009:501::18, 39.96.153.41, 39.96.153.51, 47.118.199.201, 47.118.199.211, 120.76.107.41, 120.76.107.51, 139.224.142.111 and 139.224.142.121.

dns9.hichina.com points to: 2408:4009:501::17, 39.96.153.42, 39.96.153.52, 47.118.199.202, 47.118.199.212, 120.76.107.42, 120.76.107.52, 139.224.142.112 and 139.224.142.122.

Mail Servers

51jo.cn is handled by two mail servers: mxbiz1.qq.com and mxbiz2.qq.com.

51jo.cn shares the same mail server setup as other domains, for instance ufutx.com, gocostudio.com, zeput.com, xm2r.com and sz-hmt.com.

51jo.cn shares mail servers with other domains at least partially, including vsupa.com, hrxy.net, gotran.com, angolocaffe.com and xtrip.space.

these mail servers are often used with mxn.mxhichina.com and mxw.mxhichina.com.

51jo.cn - robtex.com

51jo.cn

cn