`51668.cn`

DNSSEC	⚠️ Not signed
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=2034589158

Same first word

51668.cn

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DNS History

6 records (2 active, 4 former)

●NSdns15.hichina.com2026-03-15 → 2026-03-26 · 2 obs

● 2026-03-15 05:16:10
● 2026-03-26 09:52:16

●NSdns16.hichina.com2026-03-15 → 2026-03-26 · 2 obs

● 2026-03-15 05:16:10
● 2026-03-26 09:52:16

○A47.88.3.2332016-07-17 → 2016-07-17 · 4 obs

○ 2016-03-21 15:43:30
● 2016-07-17 09:59:58
○ 2017-04-09 19:37:40
○ 2026-03-26 09:52:16

○A54.183.180.822015-08-25 → 2015-08-25 · 3 obs

● 2015-08-25 06:30:02
○ 2016-03-21 15:43:30
○ 2026-03-26 09:52:16

○A67.229.168.422016-03-21 → 2016-03-21 · 4 obs

○ 2015-08-25 06:30:02
● 2016-03-21 15:43:30
○ 2016-07-17 09:59:58
○ 2026-03-26 09:52:16

○A67.229.168.432016-03-21 → 2016-03-21 · 4 obs

○ 2015-08-25 06:30:02
● 2016-03-21 15:43:30
○ 2016-07-17 09:59:58
○ 2026-03-26 09:52:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn...	-
51668.cn	dns15.hichina.com, dns16.hichina.com	-

✅ Authoritative Response

Server:120.76.107.51

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 51668.cn (unsigned zone)

⏱️ Timing

Total: 1489ms | Queries: -

📄 Records

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

Analysis

Name Servers

51668.cn has two name servers: dns15.hichina.com and dns16.hichina.com.

51668.cn shares the same name server setup as other domains, for example socq.net, wasolife.com, miraclerc.com, bioheb.com and tysy.com.cn.

51668.cn at least partially shares name servers with other domains; for example www8.hn.cn and designtec.xyz; iplay.top and vis.hk.

These name servers are commonly used together with expirens3.hichina.com and expirens4.hichina.com.

Host names with nine IP numbers:

dns15.hichina.com points to 2408:4009:501::23, 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.

dns16.hichina.com points to 2408:4009:501::24, 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.

51668.cn - robtex.com

51668.cn

cn