51master.com - dns.ninja
51master.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 103.21.141.130🇨🇳 SHANGHAITELECOM103.21.140.0/23 SHIDC | ||||||
| NS | a.ezdnscenter.com ⭐ | ||||||
| A | 218.98.111.140🇩🇪 HKCICL-AS-AP218.98.111.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED | ||||||
| NS | b.ezdnscenter.com | ||||||
| A | 183.253.57.210🇨🇳 CHINAMOBILE-CN183.253.0.0/16 CMI (Customer Route) | ||||||
| A | 211.99.99.58🇨🇳 DONGGUAN-1211.99.99.0/24 | ||||||
| MX | mxbiz1.qq.com ⭐ | ||||||
| MX | mxbiz2.qq.com(10) | ||||||
| TXT | v=spf1 include:spf.mail.qq.com ~all | ||||||
| SOA | a.ezdnscenter.comdnsadmin@ezdnscenter.com serial=1751342704 | ||||||
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.netnstld@verisign-grs.com serial=1786481104 | ||||||
Same first word
51master.com |
Similar names
DNS History
8 records (5 active, 3 former)
●NSa.ezdnscenter.com2026-02-27 → 2026-08-11 · 3 obs
● 2026-02-27 05:15:48
● 2026-08-11 21:08:02
●NSb.ezdnscenter.com2026-02-27 → 2026-08-11 · 3 obs
● 2026-02-27 05:15:48
● 2026-08-11 21:08:02
○NSdns.bizcn.com2015-08-18 → 2016-08-21 · 4 obs
● 2016-08-21 07:51:06
○ 2026-02-27 05:15:48
○ 2026-08-11 21:08:02
○NSns1.4everdns.com2015-08-18 → 2016-08-21 · 4 obs
● 2016-08-21 07:51:06
○ 2026-02-27 05:15:48
○ 2026-08-11 21:08:02
○NSns2.4everdns.com2015-08-18 → 2016-08-21 · 4 obs
● 2016-08-21 07:51:06
○ 2026-02-27 05:15:48
○ 2026-08-11 21:08:02
●A103.21.141.1302026-02-27 → 2026-08-11 · 2 obs
● 2026-08-11 21:08:02
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | d.gtld-servers.net, i.gtld-servers.net, l.gtld-servers.net, g.gtld-servers.net... | - |
| 51master.com | a.ezdnscenter.com, b.ezdnscenter.com | 3 records |
✅ Authoritative Response
Server:218.98.111.140
NS records: a.ezdnscenter.com, b.ezdnscenter.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 51master.com (unsigned zone)
⏱️ Timing
Total: 525ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 103.21.141.130 |
| NS | 2 | a.ezdnscenter.com, b.ezdnscenter.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 | a.ezdnscenter.com dnsadmin.ezdnscenter.c |
📌 Glue Records Collected
Total: 3
Out-of-bailiwick: 3 (a.ezdnscenter.com, b.ezdnscenter.com, b.ezdnscenter.com)
Analysis
IP Addresses
51master.com resolves to one IP address: 103.21.141.130.
asint.com.cn, acewaygroup.com.cn, yibaipro.com and two other host names share IP numbers with 51master.com.
Name Servers
51master.com is delegated to two name servers: a.ezdnscenter.com and b.ezdnscenter.com.
51master.com uses the same name servers as several other domains — among them shengmingneng.com, jumbopowersaver.com, 7gege.com and two more.
Hostnames that resolve to two IP addresses:
b.ezdnscenter.com points to 183.253.57.210 and 211.99.99.58.
Hosts with just one IP address:
a.ezdnscenter.com points to 218.98.111.140.
Mail Servers
Mail for 51master.com is handled by two mail servers — mxbiz1.qq.com and mxbiz2.qq.com.
51master.com uses an identical mail server configuration to several other domains — among them tousu.org.cn, lineae.cn, tradeit.cn and two more.
51master.com has at least partial mail server overlap with other domains such as ieechina.com, lklk.com, cosavigo.cc and two more.