extendoffice.cn - robtex.com
extendoffice.cn
| CNAME | www.extendoffice.com | ||||||
| DNSSEC | ⚠️ Not signed | ||||||
| A | 13.33.109.38🇺🇸 Amazon13.33.109.0/24 - Cloudfront | ||||||
| PTR | server-13-33-109-38.bos50.r.cloudfront.net | ||||||
| A | 13.33.109.39🇺🇸 Amazon13.33.109.0/24 - Cloudfront | ||||||
| A | 13.33.109.46🇺🇸 Amazon13.33.109.0/24 - Cloudfront | ||||||
| A | 13.33.109.113🇺🇸 Amazon13.33.109.0/24 - Cloudfront | ||||||
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=2034709978 | ||||||
Same first word
extendoffice.net |
extendoffice.com |
extendoffice.cn |
DNS History
3 records (3 active, 0 former)
●NSdns15.hichina.com2026-02-17 → 2026-04-25 · 2 obs
● 2026-02-17 14:43:36
● 2026-04-25 07:59:48
● 2026-04-25 07:59:48
●NSdns16.hichina.com2026-02-17 → 2026-04-25 · 2 obs
● 2026-02-17 14:43:36
● 2026-04-25 07:59:48
● 2026-04-25 07:59:48
●CNAMEwww.extendoffice.com2026-02-17 → 2026-04-25 · 2 obs
● 2026-02-17 14:43:36
● 2026-04-25 07:59:48
● 2026-04-25 07:59:48
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn... | - |
| extendoffice.cn | dns15.hichina.com, dns16.hichina.com | - |
✅ Authoritative Response
Server:47.118.199.201
NS records: dns15.hichina.com, dns16.hichina.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for extendoffice.cn (unsigned zone)
⏱️ Timing
Total: 4489ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | dns15.hichina.com, dns16.hichina.com |
| CNAME | 1 | www.extendoffice.com |
| SOA | 1 | dns15.hichina.com hostmaster.hichina.com |
Analysis
IP Addresses
extendoffice.cn points to four IP numbers: 13.33.109.38, 13.33.109.39, 13.33.109.46 and 13.33.109.113.
Other host names, for instance lyrawellness.com.au, www.editorialedomani.it, accy-int.spad-ams.toyota.com, d2ob7jsxg0qrao.cloudfront.net and filigram.me share IP numbers with extendoffice.cn.