51office.cn - robtex.com
51office.cn
| CNAME | www.zucbd.com | ||||||
| DNSSEC | ⚠️ Not signed | ||||||
| A | 122.51.203.48🇨🇳 TENCENT-NET-AP122.51.192.0/18 | ||||||
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=2035065033 | ||||||
Subdomains
www.51office.cn |
Same first word
Similar names
DNS History
3 records (3 active, 0 former)
●NSdns1.hichina.com2026-05-20 → 2026-07-20 · 2 obs
● 2026-05-20 04:04:44
● 2026-07-20 10:32:38
● 2026-07-20 10:32:38
●NSdns2.hichina.com2026-05-20 → 2026-07-20 · 2 obs
● 2026-05-20 04:04:44
● 2026-07-20 10:32:38
● 2026-07-20 10:32:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| 51office.cn | dns1.hichina.com, dns2.hichina.com | - |
✅ Authoritative Response
Server:39.96.153.63
NS records: dns1.hichina.com, dns2.hichina.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 51office.cn (unsigned zone)
⏱️ Timing
Total: 3547ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | dns1.hichina.com, dns2.hichina.com |
| CNAME | 1 | www.zucbd.com |
| SOA | 1 | dns1.hichina.com hostmaster.hichina.com |
Analysis
Hierarchy
www.51office.cn is a subdomain of 51office.cn.
IP Addresses
51office.cn directs to one IP number, which is 122.51.203.48.
Other host names, such as www.zucbd.com, share IP numbers with 51office.cn.