`51etr.com`

DNSSEC	⚠️ Not signed
NS	`vip3.alidns.com` ⭐ ⚠️ Not in parent delegation
		A	2408:4009:500::3^{🇨🇳 Alibaba-Cloud2408:4009:500::/48 Alibaba Group}
		A	8.212.93.3^{🇭🇰 Alibaba_Cloud_SEC8.212.93.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	140.205.1.5^{🇨🇳 Alibaba-Cloud140.205.1.0/24 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	170.33.32.210^{🇸🇬 Alibaba_Cloud_SEC170.33.32.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	170.33.40.136^{🇸🇬 Alibaba_Cloud_SEC170.33.40.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	170.33.73.26^{🇸🇬 Alibaba_Cloud_SEC170.33.73.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	170.33.80.10^{🇸🇬 Alibaba_Cloud_SEC170.33.80.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
NS	`vip1.alidns.com` ⚠️ Not in zone NS records
		A	2408:4009:500::1^{🇨🇳 Alibaba-Cloud2408:4009:500::/48 Alibaba Group}
		A	8.212.93.1^{🇭🇰 Alibaba_Cloud_SEC8.212.93.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	140.205.1.1^{🇨🇳 Alibaba-Cloud140.205.1.0/24 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	170.33.32.208^{🇸🇬 Alibaba_Cloud_SEC170.33.32.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	170.33.73.24^{🇸🇬 Alibaba_Cloud_SEC170.33.73.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	170.33.80.8^{🇸🇬 Alibaba_Cloud_SEC170.33.80.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
NS	`vip2.alidns.com` ⚠️ Not in zone NS records
		A	2408:4009:500::2^{🇨🇳 Alibaba-Cloud2408:4009:500::/48 Alibaba Group}
		A	8.212.93.2^{🇭🇰 Alibaba_Cloud_SEC8.212.93.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	140.205.1.2^{🇨🇳 Alibaba-Cloud140.205.1.0/24 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	170.33.32.209^{🇸🇬 Alibaba_Cloud_SEC170.33.32.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	170.33.73.25^{🇸🇬 Alibaba_Cloud_SEC170.33.73.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	170.33.80.9^{🇸🇬 Alibaba_Cloud_SEC170.33.80.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
NS	`vip4.alidns.com` ⚠️ Not in parent delegation
		A	2408:4009:500::4^{🇨🇳 Alibaba-Cloud2408:4009:500::/48 Alibaba Group}
		A	8.212.93.4^{🇭🇰 Alibaba_Cloud_SEC8.212.93.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	140.205.1.6^{🇨🇳 Alibaba-Cloud140.205.1.0/24 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	170.33.32.211^{🇸🇬 Alibaba_Cloud_SEC170.33.32.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	170.33.40.137^{🇸🇬 Alibaba_Cloud_SEC170.33.40.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	170.33.73.27^{🇸🇬 Alibaba_Cloud_SEC170.33.73.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	170.33.80.11^{🇸🇬 Alibaba_Cloud_SEC170.33.80.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
MX	`mxbiz1.qq.com` ⭐
		A	203.205.147.218^{🇭🇰 TENCENT-NET-AP-CN203.205.147.0/24 Proxy-registered route object}
		A	203.205.232.191^{🇭🇰 TENCENT-NET-AP-CN203.205.232.0/23 Proxy-registered route object}
MX	`mxbiz2.qq.com`⁽¹⁰⁾
		A	203.205.232.191^{🇭🇰 TENCENT-NET-AP-CN203.205.232.0/23 Proxy-registered route object}
TXT	`v=spf1 include:spf.mail.qq.com ~all`
SOA	`vip3.alidns.com`hostmaster@hichina.com 2025-12-11 #7

`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=1771291435

Same first word

51etr.com

Similar names

51tre.com

DNS History

6 records (6 active, 0 former)

●NSvip1.alidns.com2026-03-17 → 2026-03-24 · 2 obs

● 2026-03-17 08:35:16
● 2026-03-24 01:51:32

●NSvip2.alidns.com2026-03-17 → 2026-03-24 · 2 obs

● 2026-03-17 08:35:16
● 2026-03-24 01:51:32

●NSvip3.alidns.com2026-03-17 → 2026-03-24 · 2 obs

● 2026-03-17 08:35:16
● 2026-03-24 01:51:32

●NSvip4.alidns.com2026-03-17 → 2026-03-24 · 2 obs

● 2026-03-17 08:35:16
● 2026-03-24 01:51:32

●MXmxbiz1.qq.com2026-03-17 → 2026-03-24 · 2 obs

● 2026-03-17 08:35:16
● 2026-03-24 01:51:32

●MXmxbiz2.qq.com2026-03-17 → 2026-03-24 · 2 obs

● 2026-03-17 08:35:16
● 2026-03-24 01:51:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
51etr.com	vip1.alidns.com, vip2.alidns.com	20 records

✅ Authoritative Response

Server:121.40.6.162

NS records: vip1.alidns.com, vip2.alidns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 51etr.com (unsigned zone)

⏱️ Timing

Total: 3269ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`vip4.alidns.com, vip3.alidns.com`
MX	2	`mxbiz1.qq.com (pri: 5), mxbiz2.qq.com (pri: 10)`
TXT	1	`v=spf1 include:spf.mail.qq.com ~all`
SOA	1	`vip3.alidns.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 20

Out-of-bailiwick: 20 (vip1.alidns.com, vip1.alidns.com, vip1.alidns.com...)

Analysis

Name Servers

51etr.com is delegated to four name servers: vip1.alidns.com, vip2.alidns.com, vip3.alidns.com and vip4.alidns.com.

51etr.com at least partially shares name servers with other domains, for instance zhcxkj.com, xiaochongguaiguai.com, medlander.com, ckhdea.com and cnebt.com.

Seven IP numbers per host:

vip3.alidns.com points to: 2408:4009:500::3, 8.212.93.3, 140.205.1.5, 170.33.32.210, 170.33.40.136, 170.33.73.26 and 170.33.80.10.

vip4.alidns.com points to: 2408:4009:500::4, 8.212.93.4, 140.205.1.6, 170.33.32.211, 170.33.40.137, 170.33.73.27 and 170.33.80.11.

Six IP numbers per host:

vip1.alidns.com points to: 2408:4009:500::1, 8.212.93.1, 140.205.1.1, 170.33.32.208, 170.33.73.24 and 170.33.80.8.

vip2.alidns.com points to: 2408:4009:500::2, 8.212.93.2, 140.205.1.2, 170.33.32.209, 170.33.73.25 and 170.33.80.9.

Mail Servers

51etr.com is handled by two mail servers: mxbiz1.qq.com and mxbiz2.qq.com.

51etr.com uses the same mail server configuration as other domains, such as handk.cn, zhangzhongguo.cn, topwel.com, czxiaoliu.com and kaoersi.com.

51etr.com shares mail servers with other domains at least in part, for instance smarthro.com, z2hospital.com, ykfpcb.com, jtls88.com and moxikeji.net.

Host names with two IPs:

mxbiz1.qq.com points to 203.205.147.218 and 203.205.232.191.

Host names with one IP:

mxbiz2.qq.com points to 203.205.232.191.

Host names pointing to 203.205.232.191:

mxbiz1.qq.com and mxbiz2.qq.com.

51etr.com - robtex.com

51etr.com

com

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

Name Servers

Mail Servers

`51etr.com`

`com`