51kdn.cn - robtex.com
51kdn.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=2034788515 | ||||||
DNS History
15 records (0 active, 15 former)
○NS(root)2015-08-03 → 2015-11-26 · 4 obs
● 2015-08-03 21:21:28
● 2015-11-26 21:58:48
○ 2016-01-16 16:22:24
○ 2026-05-13 20:25:10
● 2015-11-26 21:58:48
○ 2016-01-16 16:22:24
○ 2026-05-13 20:25:10
○NSn3589.ns.yunjiasu.com2016-01-16 → 2017-06-02 · 5 obs
○ 2015-11-26 21:58:48
● 2016-01-16 16:22:24
● 2017-06-02 00:08:16
○ 2026-03-30 15:02:12
○ 2026-05-13 20:25:10
● 2016-01-16 16:22:24
● 2017-06-02 00:08:16
○ 2026-03-30 15:02:12
○ 2026-05-13 20:25:10
○NSn371.ns.yunjiasu.com2016-01-16 → 2017-06-02 · 5 obs
○ 2015-11-26 21:58:48
● 2016-01-16 16:22:24
● 2017-06-02 00:08:16
○ 2026-03-30 15:02:12
○ 2026-05-13 20:25:10
● 2016-01-16 16:22:24
● 2017-06-02 00:08:16
○ 2026-03-30 15:02:12
○ 2026-05-13 20:25:10
○NSns1.365cyd.net2015-11-26 → 2015-11-26 · 4 obs
○ 2015-08-03 21:21:28
● 2015-11-26 21:58:48
○ 2016-01-16 16:22:24
○ 2026-05-13 20:25:10
● 2015-11-26 21:58:48
○ 2016-01-16 16:22:24
○ 2026-05-13 20:25:10
○NSns1.jiasule.net2015-08-03 → 2015-11-26 · 4 obs
● 2015-08-03 21:21:28
● 2015-11-26 21:58:48
○ 2016-01-16 16:22:24
○ 2026-05-13 20:25:10
● 2015-11-26 21:58:48
○ 2016-01-16 16:22:24
○ 2026-05-13 20:25:10
○NSns2.365cyd.net2015-11-26 → 2015-11-26 · 4 obs
○ 2015-08-03 21:21:28
● 2015-11-26 21:58:48
○ 2016-01-16 16:22:24
○ 2026-05-13 20:25:10
● 2015-11-26 21:58:48
○ 2016-01-16 16:22:24
○ 2026-05-13 20:25:10
○NSns2.jiasule.net2015-08-03 → 2015-11-26 · 4 obs
● 2015-08-03 21:21:28
● 2015-11-26 21:58:48
○ 2016-01-16 16:22:24
○ 2026-05-13 20:25:10
● 2015-11-26 21:58:48
○ 2016-01-16 16:22:24
○ 2026-05-13 20:25:10
○MXmxbiz1.qq.com2015-08-03 → 2017-06-02 · 4 obs
● 2015-08-03 21:21:28
● 2017-06-02 00:08:16
○ 2026-03-30 15:02:12
○ 2026-05-13 20:25:10
● 2017-06-02 00:08:16
○ 2026-03-30 15:02:12
○ 2026-05-13 20:25:10
○MXmxbiz2.qq.com2015-08-03 → 2017-06-02 · 4 obs
● 2015-08-03 21:21:28
● 2017-06-02 00:08:16
○ 2026-03-30 15:02:12
○ 2026-05-13 20:25:10
● 2017-06-02 00:08:16
○ 2026-03-30 15:02:12
○ 2026-05-13 20:25:10
○A113.207.76.52015-08-03 → 2015-08-03 · 3 obs
● 2015-08-03 21:21:28
○ 2015-11-26 21:58:48
○ 2026-05-13 20:25:10
○ 2015-11-26 21:58:48
○ 2026-05-13 20:25:10
○A113.207.76.632015-08-03 → 2015-08-03 · 3 obs
● 2015-08-03 21:21:28
○ 2017-02-07 17:13:58
○ 2026-05-13 20:25:10
○ 2017-02-07 17:13:58
○ 2026-05-13 20:25:10
○A113.207.76.872015-08-03 → 2015-08-03 · 3 obs
● 2015-08-03 21:21:28
○ 2015-11-26 21:58:48
○ 2026-05-13 20:25:10
○ 2015-11-26 21:58:48
○ 2026-05-13 20:25:10
○A121.42.89.492015-11-26 → 2015-11-26 · 4 obs
○ 2015-08-03 21:21:28
● 2015-11-26 21:58:48
○ 2016-01-16 16:22:24
○ 2026-05-13 20:25:10
● 2015-11-26 21:58:48
○ 2016-01-16 16:22:24
○ 2026-05-13 20:25:10
○A162.159.208.702016-01-16 → 2017-06-02 · 5 obs
○ 2015-11-26 21:58:48
● 2016-01-16 16:22:24
● 2017-06-02 00:08:16
○ 2026-03-30 15:02:12
○ 2026-05-13 20:25:10
● 2016-01-16 16:22:24
● 2017-06-02 00:08:16
○ 2026-03-30 15:02:12
○ 2026-05-13 20:25:10
○A162.159.209.702016-01-16 → 2017-06-02 · 5 obs
○ 2015-11-26 21:58:48
● 2016-01-16 16:22:24
● 2017-06-02 00:08:16
○ 2026-03-30 15:02:12
○ 2026-05-13 20:25:10
● 2016-01-16 16:22:24
● 2017-06-02 00:08:16
○ 2026-03-30 15:02:12
○ 2026-05-13 20:25:10
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn... | - |
✅ Authoritative Response
Server:203.119.25.1
NS records: a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn, e.dns.cn
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 5867ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|