0study.cn - robtex.com
0study.cn
| 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=2034626814 | ||||||
Subdomains
Similar names
DNS History
3 records (0 active, 3 former)
○NSns1.51dns.com2015-05-13 → 2015-10-20 · 4 obs
● 2015-05-13 12:48:24
● 2015-10-20 23:07:02
○ 2015-12-19 13:51:04
○ 2026-04-03 00:10:12
● 2015-10-20 23:07:02
○ 2015-12-19 13:51:04
○ 2026-04-03 00:10:12
○NSns2.51dns.com2015-10-20 → 2015-10-20 · 4 obs
○ 2015-05-13 12:48:24
● 2015-10-20 23:07:02
○ 2015-12-19 13:51:04
○ 2026-04-03 00:10:12
● 2015-10-20 23:07:02
○ 2015-12-19 13:51:04
○ 2026-04-03 00:10:12
○A107.183.86.512015-05-13 → 2015-10-20 · 4 obs
● 2015-05-13 12:48:24
● 2015-10-20 23:07:02
○ 2015-12-19 13:51:04
○ 2026-04-03 00:10:12
● 2015-10-20 23:07:02
○ 2015-12-19 13:51:04
○ 2026-04-03 00:10:12
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | b.dns.cn, a.dns.cn, d.dns.cn, e.dns.cn... | - |
✅ Authoritative Response
Server:203.119.26.1
NS records: b.dns.cn, a.dns.cn, d.dns.cn, e.dns.cn, c.dns.cn
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 267ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|