51tool.com - dns.ninja

`51tool.com`

DNSSEC	⚠️ Not signed
A	120.79.68.225^{🇨🇳 Alibaba-Cloud120.79.0.0/16}
NS	`dns1.hichina.com` ⭐
		A	2408:4009:501::9^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.43^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.63^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.203^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.213^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.43^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.63^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.113^{🇨🇳 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	139.224.142.123^{🇨🇳 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	`dns2.hichina.com`
		A	2408:4009:501::10^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.44^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.54^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.204^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.214^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.44^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.54^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.114^{🇨🇳 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	139.224.142.124^{🇨🇳 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	`hzmx01.mxmail.netease.com` ⭐
		A	47.251.71.119^{🇺🇸 Alibaba-Cloud47.251.0.0/17 Proxy-registered route object}
		A	47.251.84.126^{🇺🇸 Alibaba-Cloud47.251.0.0/17 Proxy-registered route object}
MX	`hzmx02.mxmail.netease.com`⁽¹⁰⁾
		A	47.251.71.119^{🇺🇸 Alibaba-Cloud47.251.0.0/17 Proxy-registered route object}
		A	47.251.84.126^{🇺🇸 Alibaba-Cloud47.251.0.0/17 Proxy-registered route object}
TXT	`v=spf1 include:spf.163.com -all`
SOA	`dns1.hichina.com`hostmaster@hichina.com 2026-06-04 #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=1783943437

Same first word

51tool.com.cn

51tool.com

DNS History

27 records (5 active, 22 former)

●NSdns1.hichina.com2026-07-13 → 2026-07-13 · 2 obs

○ 2017-03-30 07:02:46
● 2026-07-13 12:19:02

○NSdns1.iidns.com2015-08-28 → 2017-03-30 · 3 obs

● 2015-08-28 11:03:44
● 2017-03-30 07:02:46
○ 2026-07-13 12:19:02

●NSdns2.hichina.com2026-07-13 → 2026-07-13 · 2 obs

○ 2017-03-30 07:02:46
● 2026-07-13 12:19:02

○NSdns2.iidns.com2015-08-28 → 2016-12-05 · 4 obs

● 2015-08-28 11:03:44
● 2016-12-05 18:33:38
○ 2017-03-30 07:02:46
○ 2026-07-13 12:19:02

○NSdns3.iidns.com2015-08-28 → 2016-12-05 · 4 obs

● 2015-08-28 11:03:44
● 2016-12-05 18:33:38
○ 2017-03-30 07:02:46
○ 2026-07-13 12:19:02

○NSdns4.iidns.com2015-08-28 → 2016-12-05 · 4 obs

● 2015-08-28 11:03:44
● 2016-12-05 18:33:38
○ 2017-03-30 07:02:46
○ 2026-07-13 12:19:02

○NSdns5.iidns.com2015-08-28 → 2016-12-05 · 4 obs

● 2015-08-28 11:03:44
● 2016-12-05 18:33:38
○ 2017-03-30 07:02:46
○ 2026-07-13 12:19:02

○NSdns6.iidns.com2015-08-28 → 2016-12-09 · 4 obs

● 2015-08-28 11:03:44
● 2016-12-09 09:52:18
○ 2017-03-30 07:02:46
○ 2026-07-13 12:19:02

●MXhzmx01.mxmail.netease.com2026-07-13 → 2026-07-13 · 1 obs

● 2026-07-13 12:19:02

●MXhzmx02.mxmail.netease.com2026-07-13 → 2026-07-13 · 1 obs

● 2026-07-13 12:19:02

○A103.241.230.1352017-03-30 → 2017-03-30 · 3 obs

○ 2016-12-09 09:52:18
● 2017-03-30 07:02:46
○ 2026-07-13 12:19:02

○A103.241.230.1372017-03-30 → 2017-03-30 · 3 obs

○ 2016-12-09 09:52:18
● 2017-03-30 07:02:46
○ 2026-07-13 12:19:02

○A103.241.230.1382017-03-30 → 2017-03-30 · 3 obs

○ 2016-12-09 09:52:18
● 2017-03-30 07:02:46
○ 2026-07-13 12:19:02

○A103.241.230.1402017-03-30 → 2017-03-30 · 3 obs

○ 2016-12-09 09:52:18
● 2017-03-30 07:02:46
○ 2026-07-13 12:19:02

○A107.167.19.672015-09-05 → 2015-11-10 · 5 obs

○ 2015-08-28 11:03:44
● 2015-09-05 14:00:10
● 2015-11-10 19:51:40
○ 2016-04-28 03:57:44
○ 2026-07-13 12:19:02

○A107.167.19.682015-09-05 → 2015-11-10 · 5 obs

○ 2015-08-28 11:03:44
● 2015-09-05 14:00:10
● 2015-11-10 19:51:40
○ 2016-04-28 03:57:44
○ 2026-07-13 12:19:02

○A107.167.19.692015-09-05 → 2015-11-10 · 5 obs

○ 2015-08-28 11:03:44
● 2015-09-05 14:00:10
● 2015-11-10 19:51:40
○ 2016-04-28 03:57:44
○ 2026-07-13 12:19:02

○A107.167.19.702015-09-05 → 2015-11-10 · 5 obs

○ 2015-08-28 11:03:44
● 2015-09-05 14:00:10
● 2015-11-10 19:51:40
○ 2016-04-28 03:57:44
○ 2026-07-13 12:19:02

○A107.167.19.742016-04-28 → 2016-08-21 · 5 obs

○ 2015-11-10 19:51:40
● 2016-04-28 03:57:44
● 2016-08-21 02:22:38
○ 2016-09-23 13:47:26
○ 2026-07-13 12:19:02

○A107.167.19.752016-04-28 → 2016-12-09 · 5 obs

○ 2015-11-10 19:51:40
● 2016-04-28 03:57:44
● 2016-12-09 09:52:18
○ 2017-03-30 07:02:46
○ 2026-07-13 12:19:02

○A107.167.19.762016-09-23 → 2016-12-09 · 5 obs

○ 2016-08-21 02:22:38
● 2016-09-23 13:47:26
● 2016-12-09 09:52:18
○ 2017-03-30 07:02:46
○ 2026-07-13 12:19:02

○A107.167.19.772016-09-23 → 2016-12-09 · 5 obs

○ 2016-08-21 02:22:38
● 2016-09-23 13:47:26
● 2016-12-09 09:52:18
○ 2017-03-30 07:02:46
○ 2026-07-13 12:19:02

○A107.167.19.782016-09-23 → 2016-12-09 · 5 obs

○ 2016-08-21 02:22:38
● 2016-09-23 13:47:26
● 2016-12-09 09:52:18
○ 2017-03-30 07:02:46
○ 2026-07-13 12:19:02

●A120.79.68.2252026-07-13 → 2026-07-13 · 2 obs

○ 2017-03-30 07:02:46
● 2026-07-13 12:19:02

○A198.148.92.872015-08-28 → 2015-08-28 · 3 obs

● 2015-08-28 11:03:44
○ 2015-09-05 14:00:10
○ 2026-07-13 12:19:02

○A198.148.92.882015-08-28 → 2015-08-28 · 3 obs

● 2015-08-28 11:03:44
○ 2015-09-05 14:00:10
○ 2026-07-13 12:19:02

○CNAMEcs.ename.net2015-08-28 → 2017-03-30 · 15 obs

● 2015-08-28 11:03:44
● 2015-10-09 08:35:22
○ 2015-10-16 06:12:16
● 2015-10-18 07:23:52
● 2015-11-10 19:51:40
○ 2016-02-04 18:25:28
● 2016-04-28 03:57:44
● 2016-09-23 13:47:26
○ 2016-11-05 05:12:52
● 2016-11-23 17:29:06
● 2016-11-30 13:33:26
○ 2016-12-05 18:33:38
● 2016-12-09 09:52:18
● 2017-03-30 07:02:46
○ 2026-07-13 12:19:02

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
51tool.com	dns2.hichina.com, dns1.hichina.com	18 records

✅ Authoritative Response

Server:120.76.107.44

NS records: dns2.hichina.com, dns1.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 51tool.com (unsigned zone)

⏱️ Timing

Total: 588ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`120.79.68.225`
NS	2	`dns1.hichina.com, dns2.hichina.com`
MX	2	`hzmx02.mxmail.netease.com (pri: 10), hzmx01.mxmail.netease.com (pri: 5)`
TXT	1	`v=spf1 include:spf.163.com -all`
SOA	1	`dns1.hichina.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns2.hichina.com, dns2.hichina.com, dns2.hichina.com...)

Analysis

IP Addresses

51tool.com has exactly one IP address — 120.79.68.225.

douco.com, dou.co and douphp.com are examples of other host names that share IP numbers with 51tool.com.

Name Servers

Two name servers handle the delegation for 51tool.com: dns1.hichina.com and dns2.hichina.com.

The name server configuration of 51tool.com is shared with other domains, for instance wldx.gov.cn, ztlhkj.cn, casbin.com and two others.

51tool.com partially shares its NS delegation with several other domains, including huzhizhu.com, qpuu.cn, jxds58.com and two others.

These name servers are regularly seen alongside expirens3.hichina.com and expirens4.hichina.com as name servers.

Hosts with 9 IP addresses each:

dns1.hichina.com resolves to 39.96.153.43, 39.96.153.63 and 47.118.199.203 among others, with 6 other IP addresses in total.

dns2.hichina.com resolves to 39.96.153.44, 39.96.153.54 and 47.118.199.204 among others, with 6 other IP addresses in total.

Mail Servers

51tool.com uses two mail servers, hzmx01.mxmail.netease.com and hzmx02.mxmail.netease.com.

The mail server setup of 51tool.com matches that of other domains such as chncz.cn, runpol.com, esti.net.cn and two others.

51tool.com uses mail servers that are also used by other domains, including sdgsgcjsjt.com, nxkg.org.cn and kdeey.com.

hzmx01.mxmail.netease.com and hzmx02.mxmail.netease.com each point to two IP numbers — 47.251.71.119 and 47.251.84.126 — making both hosts identical in their DNS resolution.

hzmx01.mxmail.netease.com along with hzmx02.mxmail.netease.com each resolve to 47.251.71.119 IP addresses.

hzmx01.mxmail.netease.com along with hzmx02.mxmail.netease.com each resolve to 47.251.84.126 IP addresses.