`51-cf.com`

DNSSEC	⚠️ Not signed
A	106.15.219.99^{🇨🇳 Alibaba-Cloud106.15.0.0/16 Alibaba (US) Technology Co., Ltd.}
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,}
SOA	`dns9.hichina.com`hostmaster@hichina.com 2026-01-09 #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=1774393017

Subdomains

www.51-cf.com

Same first word

51-cf.com

DNS History

8 records (3 active, 5 former)

●NSdns10.hichina.com2026-03-24 → 2026-03-24 · 3 obs

○ 2017-03-26 00:28:30
● 2026-03-24 23:09:56
● 2026-03-24 23:09:58

●NSdns9.hichina.com2026-03-24 → 2026-03-24 · 3 obs

○ 2017-03-26 00:28:30
● 2026-03-24 23:09:56
● 2026-03-24 23:09:58

○NSf1g1ns1.dnspod.net2015-06-28 → 2017-03-26 · 4 obs

● 2015-06-28 23:54:20
● 2017-03-26 00:28:30
○ 2026-03-24 23:09:56
○ 2026-03-24 23:09:58

○NSf1g1ns2.dnspod.net2015-06-28 → 2017-03-26 · 4 obs

● 2015-06-28 23:54:20
● 2017-03-26 00:28:30
○ 2026-03-24 23:09:56
○ 2026-03-24 23:09:58

○MXmxbiz1.qq.com2015-06-28 → 2017-01-03 · 4 obs

● 2015-06-28 23:54:20
● 2017-01-03 00:27:40
○ 2026-03-24 23:09:56
○ 2026-03-24 23:09:58

○MXmxbiz2.qq.com2015-06-28 → 2017-01-03 · 4 obs

● 2015-06-28 23:54:20
● 2017-01-03 00:27:40
○ 2026-03-24 23:09:56
○ 2026-03-24 23:09:58

●A106.15.219.992026-03-24 → 2026-03-24 · 3 obs

○ 2016-04-18 02:42:06
● 2026-03-24 23:09:56
● 2026-03-24 23:09:58

○A114.80.96.502015-06-28 → 2016-04-18 · 4 obs

● 2015-06-28 23:54:20
● 2016-04-18 02:42:06
○ 2026-03-24 23:09:56
○ 2026-03-24 23:09:58

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
51-cf.com	dns9.hichina.com, dns10.hichina.com	18 records

✅ Authoritative Response

Server:120.76.107.42

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 51-cf.com (unsigned zone)

⏱️ Timing

Total: 852ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`106.15.219.99`
NS	2	`dns10.hichina.com, dns9.hichina.com`
SOA	1	`dns9.hichina.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns9.hichina.com, dns9.hichina.com, dns9.hichina.com...)

Analysis

Hierarchy

The parent of www.51-cf.com is 51-cf.com.

IP Addresses

51-cf.com points to an IP address: 106.15.219.99.

Other host names, for instance www.51-cf.com, share IP numbers with 51-cf.com.

Name Servers

Two name servers dns10.hichina.com and dns9.hichina.com handle the delegation for 51-cf.com.

51-cf.com shares the same name server setup as other domains, for instance syyfy.com, nes9.com, routui.net, duopeipei.com and youli.ltd.

51-cf.com at least partially shares name servers with other domains, such as btcjsb.com, sqzx.org and juwa.net.

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.

51-cf.com - robtex.com

51-cf.com

com