`it51.cn`

DNSSEC	⚠️ Not signed
A	221.231.139.59^{🇨🇳 CHINATELECOM-JIANGSU-NANJING-IDC221.231.136.0/21 CTJS NJ-IDC}
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,}
SOA	`dns1.hichina.com`hostmaster@hichina.com 2026-01-09 #13

`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=2034788405

Same first word

it51.com

it51.cn

it51.net

it51.eu

it51.de

Similar names

t15i.com

51ti.org

15ti.com

i15t.com

it15.com

it15.de

51it.wang

51it.net.cn

ti51.com

51ti.com

15it.cn

51ti.cn

it15.ru

DNS History

4 records (3 active, 1 former)

●NSdns1.hichina.com2015-07-14 → 2026-05-13 · 2 obs

● 2015-07-14 21:28:52
● 2026-05-13 19:06:04

●NSdns2.hichina.com2015-07-14 → 2026-05-13 · 2 obs

● 2015-07-14 21:28:52
● 2026-05-13 19:06:04

○A221.231.138.532015-07-14 → 2018-07-19 · 4 obs

● 2015-07-14 21:28:52
● 2018-07-19 10:37:26
○ 2026-05-06 03:06:22
○ 2026-05-13 19:06:04

●A221.231.139.592026-05-06 → 2026-05-13 · 3 obs

○ 2018-07-19 10:37:26
● 2026-05-06 03:06:22
● 2026-05-13 19:06:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	b.dns.cn, c.dns.cn, e.dns.cn, a.dns.cn...	-
it51.cn	dns1.hichina.com, dns2.hichina.com	-

✅ Authoritative Response

Server:39.96.153.54

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for it51.cn (unsigned zone)

⏱️ Timing

Total: 2071ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`221.231.139.59`
NS	2	`dns2.hichina.com, dns1.hichina.com`
SOA	1	`dns1.hichina.com hostmaster.hichina.com`

Analysis

IP Addresses

it51.cn points to IP number 221.231.139.59.

For instance, other host names cell-gene.com, topark.com.cn, inder.cn, www.cell-gene.com and cjhrq.com share IP numbers with it51.cn.

Name Servers

it51.cn is delegated to two name servers: dns1.hichina.com and dns2.hichina.com.

it51.cn uses the same name server setup as other domains such as csryy.com, newpathfound.org, sdhercules.com, penmaji.com and zhifutao.com.

it51.cn shares name servers with other domains at least partially, for instance lnptdpz.com and airjet.cn.

Host names with nine IP numbers:

dns1.hichina.com points to: 2408:4009:501::9, 39.96.153.43, 39.96.153.63, 47.118.199.203, 47.118.199.213, 120.76.107.43, 120.76.107.63, 139.224.142.113 and 139.224.142.123.

dns2.hichina.com points to: 2408:4009:501::10, 39.96.153.44, 39.96.153.54, 47.118.199.204, 47.118.199.214, 120.76.107.44, 120.76.107.54, 139.224.142.114 and 139.224.142.124.

it51.cn - robtex.com

it51.cn

cn