51xsys.cn - robtex.com
51xsys.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 23.231.165.15🇺🇸 POWERLINE-HK23.231.160.0/19 FEDERAL ONLINE GROUP LLC | ||||||
| NS | ns1.julydns.com ⭐ ⚠️ Not in parent delegation | ||||||
| A | 162.159.48.223Cloudflare162.159.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns1.judns.com ⚠️ Not in zone NS records | ||||||
| A | 162.159.27.251Cloudflare162.159.27.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns2.judns.com ⚠️ Not in zone NS records | ||||||
| A | 162.159.27.251Cloudflare162.159.27.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns2.julydns.com ⚠️ Not in parent delegation | ||||||
| A | 162.159.48.223Cloudflare162.159.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| SOA | ns1.julydns.commaster@jmdns.com serial=1744870550 | ||||||
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.cnroot@cnnic.cn serial=2035130836 | ||||||
Same first word
51xsys.cn |
Similar names
DNS History
5 records (5 active, 0 former)
●NSns1.julydns.com2026-08-04 → 2026-08-04 · 2 obs
● 2026-08-04 22:42:06
●NSns2.julydns.com2026-08-04 → 2026-08-04 · 2 obs
● 2026-08-04 22:42:06
●A23.231.165.152026-08-04 → 2026-08-04 · 2 obs
● 2026-08-04 22:42:06
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | d.dns.cn, a.dns.cn, c.dns.cn, b.dns.cn... | - |
| 51xsys.cn | ns1.judns.com, ns2.judns.com | - |
✅ Authoritative Response
Server:162.159.27.251
NS records: ns1.judns.com, ns2.judns.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 51xsys.cn (unsigned zone)
⏱️ Timing
Total: 886ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 23.231.165.15 |
| NS | 2 | ns1.julydns.com, ns2.julydns.com |
| SOA | 1 | ns1.julydns.com master.jmdns.com |
Analysis
IP Addresses
51xsys.cn directs to one IP number, which is 23.231.165.15.
Among the host names that share IP numbers with 51xsys.cn are chicilon.com, kj168.com.cn, www.surfscranton.com and two others.
Name Servers
The domain 51xsys.cn is delegated to these four name servers: ns1.judns.com, ns2.judns.com, ns1.julydns.com and ns2.julydns.com.
51xsys.cn partially shares its NS delegation with several other domains, including mannabio.com, yinxingsm.com, zh-online-jisuesports.com and two others.
These name servers regularly co-occur with the name servers ns1.onclouddns.com, ns2.onclouddns.com and jm1.dns.com.
Each of ns1.judns.com, ns2.judns.com, ns1.julydns.com and ns2.julydns.com has a single IP address — ns1.judns.com and ns2.judns.com direct to 162.159.27.251, and ns1.julydns.com and ns2.julydns.com direct to 162.159.48.223.
ns1.judns.com and ns2.judns.com are host names that each point to 162.159.27.251 IP addresses.
ns1.julydns.com and ns2.julydns.com are host names that each point to 162.159.48.223 IP addresses.