u873.cn - robtex.com
u873.cn
| CNAME | tc217-site01.mac-cdn.net | ||||||
| DNSSEC | ⚠️ Not signed | ||||||
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=2034664016 | ||||||
Same first word
Similar names
DNS History
5 records (5 active, 0 former)
●NSns1.julydns.com2026-03-04 → 2026-04-13 · 2 obs
● 2026-03-04 12:28:38
● 2026-04-13 01:05:22
● 2026-04-13 01:05:22
●NSns2.julydns.com2026-03-04 → 2026-04-13 · 2 obs
● 2026-03-04 12:28:38
● 2026-04-13 01:05:22
● 2026-04-13 01:05:22
●CNAMEtc217-site01.mac-cdn.net2026-03-04 → 2026-04-13 · 2 obs
● 2026-03-04 12:28:38
● 2026-04-13 01:05:22
● 2026-04-13 01:05:22
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn... | - |
| u873.cn | ns1.judns.com, ns2.judns.com | - |
✅ Authoritative Response
Server:47.97.51.45
NS records: ns1.judns.com, ns2.judns.com
🔒 DNSSEC Status
❌ Bogus (DNSSEC validation failed)
Validation error at u873.cn: Error: DNS query timeout: 203.119.25.1 for DS u873.cn
⏱️ Timing
Total: 4249ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | ns1.julydns.com, ns2.julydns.com |
| CNAME | 1 | tc217-site01.mac-cdn.net |
| SOA | 1 | ns1.julydns.com master.jmdns.com |