`51yu.cn`

DNSSEC	⚠️ Not signed
A	23.83.240.7^{🇺🇸 IT-123.83.240.0/22 23.83.240.0/22}
		PTR	`23.83.240.7.16clouds.com`
NS	`f1g1ns1.dnspod.net` ⭐
		A	2402:4e00:1470:2::e^{🇨🇳 TENCENT-NET-AP2402:4e00:1400::/40}
		A	1.12.0.4^{🇨🇳 TENCENT-NET-AP-CN1.12.0.0/20 ZL-IDC-BOM}
		A	1.14.119.35^{🇨🇳 TENCENT-NET-AP1.14.64.0/18}
		A	111.13.13.35^{🇨🇳 CHINAMOBILE-CN111.13.0.0/16 CMI (Customer Route)}
		A	117.135.128.235^{🇨🇳 CHINAMOBILE-CN117.135.128.0/24 CMI (Customer Route)}
			PTR	`(root)`
		A	125.94.59.235^{🇨🇳 CHINANET-BACKBONE125.88.0.0/13 chinanet Guangdong network}
		A	163.177.5.35^{🇨🇳 UNICOM-GuangZhou-IDC163.177.5.0/24}
NS	`f1g1ns2.dnspod.net`
		A	2402:4e00:111:fff::c^{🇨🇳 TENCENT-NET-AP2402:4e00::/35}
		A	1.12.0.1^{🇨🇳 TENCENT-NET-AP-CN1.12.0.0/20 ZL-IDC-BOM}
		A	1.13.76.35^{🇨🇳 TENCENT-NET-AP1.13.64.0/18}
		A	36.155.149.35^{🇨🇳 CMNET-Jiangsu-AP36.155.144.0/21 CMI (Customer Route)}
		A	101.227.168.35^{🇨🇳 SHANGHAITELECOM101.227.168.0/23 SHIDC}
		A	106.39.207.235^{🇨🇳 CHINA-1106.39.192.0/19 China Telecom Beijing Co. Ltd.}
		A	111.206.98.235^{🇨🇳 CHINA169-BJ111.206.98.0/24}
		A	220.196.136.35^{🇨🇳 UNICOM-SHFT-IDC220.196.136.0/24}
TXT	`google-site-verification=J5J805qFc6xPpG8k7_QfP2diBG4F8jCDmy5CP34e1FI`
SOA	`f1g1ns1.dnspod.net`freednsadmin@dnspod.com serial=1480171029

`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=2034597276

Subdomains

www.51yu.cn

Same first word

51yu.net

51yu.cn

Similar names

uy15.com

u51y.xyz

DNS History

4 records (3 active, 1 former)

●NSf1g1ns1.dnspod.net2015-08-25 → 2026-03-28 · 2 obs

● 2015-08-25 22:25:20
● 2026-03-28 05:29:14

●NSf1g1ns2.dnspod.net2015-08-25 → 2026-03-28 · 2 obs

● 2015-08-25 22:25:20
● 2026-03-28 05:29:14

○A104.128.81.962015-08-25 → 2016-09-12 · 4 obs

● 2015-08-25 22:25:20
● 2016-09-12 02:43:02
○ 2017-08-16 02:37:14
○ 2026-03-28 05:29:14

●A23.83.240.72017-08-16 → 2026-03-28 · 3 obs

○ 2016-09-12 02:43:02
● 2017-08-16 02:37:14
● 2026-03-28 05:29:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn...	-
51yu.cn	f1g1ns1.dnspod.net, f1g1ns2.dnspod.net	-

✅ Authoritative Response

Server:111.13.13.35

NS records: f1g1ns1.dnspod.net, f1g1ns2.dnspod.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 3187ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`23.83.240.7`
NS	2	`f1g1ns1.dnspod.net, f1g1ns2.dnspod.net`
TXT	1	`google-site-verification=J5J805qFc6xPpG8`
SOA	1	`f1g1ns1.dnspod.net freednsadmin.dnspod.c`

Analysis

Hierarchy

51yu.cn is the parent of www.51yu.cn.

IP Addresses

51yu.cn points to a single IP number: 23.83.240.7.

Other host names, for instance 23.83.240.7.16clouds.com, share IP numbers with 51yu.cn.

Name Servers

51yu.cn is delegated to two name servers: f1g1ns1.dnspod.net and f1g1ns2.dnspod.net.

51yu.cn shares the same name server setup as other domains, for example rainle.com, joysunpigments.com, 8r4.com, kcloud.info and sdhntb.com.

51yu.cn at least partially shares name servers with other domains, for instance bot01qx.cfd, simetascan.com, dg-xck.com, hmis.cn and 16628.com.

These name servers are commonly used alongside the name servers a.dnspod.com, b.dnspod.com, c.dnspod.com, ns11.xincache.com and ns12.xincache.com.

Host names with eight IP numbers: f1g1ns2.dnspod.net points to: 2402:4e00:111:fff::c, 1.12.0.1, 1.13.76.35, 36.155.149.35, 101.227.168.35, 106.39.207.235, 111.206.98.235 and 220.196.136.35.

Host names with seven IP numbers: f1g1ns1.dnspod.net points to: 2402:4e00:1470:2::e, 1.12.0.4, 1.14.119.35, 111.13.13.35, 117.135.128.235, 125.94.59.235 and 163.177.5.35.

51yu.cn - robtex.com

51yu.cn

cn