`51tr.cn`

DNSSEC	⚠️ Not signed
A	182.112.115.226^{🇨🇳 CHINA169-Backbone182.112.0.0/12 China Unicom Henan Province Network}
NS	`dns15.hichina.com` ⭐
		A	2408:4009:501::23^{🇨🇳 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	`dns16.hichina.com`
		A	2408:4009:501::24^{🇨🇳 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,}
SOA	`dns15.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=2035055235

Same first word

51tr.net

51tr.cn

51tr.top

Similar names

5rt1.com

rt51.ru

15tr.ru

rt51.com

51rt.com

tr51.be

r15t.cn

rt15.at

rt15.org

t51r.com

t15r.xyz

t5r1.icu

tr51.org

rt15.com

DNS History

11 records (3 active, 8 former)

●NSdns15.hichina.com2018-09-07 → 2026-07-18 · 3 obs

○ 2017-02-06 07:31:00
● 2018-09-07 04:51:40
● 2026-07-18 07:47:00

●NSdns16.hichina.com2018-09-07 → 2026-07-18 · 3 obs

○ 2017-02-06 07:31:00
● 2018-09-07 04:51:40
● 2026-07-18 07:47:00

○NSns11.xincache.com2017-02-06 → 2017-02-06 · 4 obs

○ 2015-07-20 03:02:36
● 2017-02-06 07:31:00
○ 2018-09-07 04:51:40
○ 2026-07-18 07:47:00

○NSns12.xincache.com2017-02-06 → 2017-02-06 · 4 obs

○ 2015-07-20 03:02:36
● 2017-02-06 07:31:00
○ 2018-09-07 04:51:40
○ 2026-07-18 07:47:00

○NSns19.xincache.com2015-07-20 → 2015-07-20 · 3 obs

● 2015-07-20 03:02:36
○ 2017-02-06 07:31:00
○ 2026-07-18 07:47:00

○NSns20.xincache.com2015-07-20 → 2015-07-20 · 3 obs

● 2015-07-20 03:02:36
○ 2017-02-06 07:31:00
○ 2026-07-18 07:47:00

○MXmail.skrimple.com2015-11-16 → 2015-11-16 · 3 obs

● 2015-11-16 08:25:08
○ 2017-02-06 07:31:00
○ 2026-07-18 07:47:00

●A182.112.115.2262026-07-03 → 2026-07-18 · 3 obs

○ 2026-07-01 09:04:42
● 2026-07-03 23:36:22
● 2026-07-18 07:47:00

○A184.105.178.922015-11-16 → 2015-11-16 · 4 obs

○ 2015-07-20 03:02:36
● 2015-11-16 08:25:08
○ 2017-02-06 07:31:00
○ 2026-07-18 07:47:00

○A203.171.230.682015-07-20 → 2015-07-20 · 3 obs

● 2015-07-20 03:02:36
○ 2015-11-16 08:25:08
○ 2026-07-18 07:47:00

○A43.228.206.102018-09-07 → 2018-09-07 · 4 obs

○ 2017-02-06 07:31:00
● 2018-09-07 04:51:40
○ 2026-07-01 09:04:42
○ 2026-07-18 07:47:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	a.dns.cn, c.dns.cn, e.dns.cn, d.dns.cn...	-
51tr.cn	dns15.hichina.com, dns16.hichina.com	-

✅ Authoritative Response

Server:139.224.142.122

NS records: dns15.hichina.com, dns16.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 1692ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`182.112.115.226`
NS	2	`dns16.hichina.com, dns15.hichina.com`
SOA	1	`dns15.hichina.com hostmaster.hichina.com`

Analysis

IP Addresses

51tr.cn directs to one IP number, which is 182.112.115.226.

Name Servers

51tr.cn has two authoritative name servers — dns15.hichina.com and dns16.hichina.com.

51tr.cn has the same name server delegation as a number of other domains, such as pcbnengbo.com, allcitysz.cn, hnqingtian.com and two more.

51tr.cn partially shares its NS delegation with several other domains, including legending.com, amqjxx.com, belta.cn and two others.

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

Host names resolving to 9 IP numbers:

dns15.hichina.com points to 39.96.153.42, 39.96.153.52, 47.118.199.202 and 6 other IP addresses.

dns16.hichina.com points to 39.96.153.41, 39.96.153.51, 47.118.199.201 and 6 other IP addresses.

51tr.cn - robtex.com

51tr.cn

cn