21cnu.com - robtex.com
21cnu.com
| DNSSEC | ⚠️ Not signed | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1771291435 | ||||||
Subdomains
021762.21cnu.com |
002048802.21cnu.com |
001094.21cnu.com |
Similar names
DNS History
10 records (0 active, 10 former)
○NSdns10.hichina.com2015-11-18 → 2017-10-09 · 5 obs
○ 2015-07-06 18:06:14
● 2015-11-18 11:36:50
● 2017-10-09 20:48:18
○ 2026-02-25 03:31:02
○ 2026-03-23 23:08:38
● 2015-11-18 11:36:50
● 2017-10-09 20:48:18
○ 2026-02-25 03:31:02
○ 2026-03-23 23:08:38
○NSdns9.hichina.com2015-11-18 → 2017-10-09 · 5 obs
○ 2015-07-06 18:06:14
● 2015-11-18 11:36:50
● 2017-10-09 20:48:18
○ 2026-02-25 03:31:02
○ 2026-03-23 23:08:38
● 2015-11-18 11:36:50
● 2017-10-09 20:48:18
○ 2026-02-25 03:31:02
○ 2026-03-23 23:08:38
○NSns1.julydns.com2026-02-25 → 2026-03-23 · 2 obs
○ 2026-02-25 03:31:02
○ 2026-03-23 23:08:38
○ 2026-03-23 23:08:38
○NSns2.julydns.com2026-02-25 → 2026-03-23 · 2 obs
○ 2026-02-25 03:31:02
○ 2026-03-23 23:08:38
○ 2026-03-23 23:08:38
○NSwxs12015-07-06 → 2015-07-06 · 3 obs
● 2015-07-06 18:06:14
○ 2015-11-18 11:36:50
○ 2026-03-23 23:08:38
○ 2015-11-18 11:36:50
○ 2026-03-23 23:08:38
○NSwxw32015-07-06 → 2015-07-06 · 3 obs
● 2015-07-06 18:06:14
○ 2015-11-18 11:36:50
○ 2026-03-23 23:08:38
○ 2015-11-18 11:36:50
○ 2026-03-23 23:08:38
○A121.197.34.122015-07-06 → 2015-07-06 · 3 obs
● 2015-07-06 18:06:14
○ 2015-11-18 11:36:50
○ 2026-03-23 23:08:38
○ 2015-11-18 11:36:50
○ 2026-03-23 23:08:38
○A121.40.186.1962016-08-27 → 2016-08-27 · 4 obs
○ 2015-11-18 11:36:50
● 2016-08-27 12:26:16
○ 2017-10-09 20:48:18
○ 2026-03-23 23:08:38
● 2016-08-27 12:26:16
○ 2017-10-09 20:48:18
○ 2026-03-23 23:08:38
○A154.93.166.832026-02-25 → 2026-03-23 · 2 obs
○ 2026-02-25 03:31:02
○ 2026-03-23 23:08:38
○ 2026-03-23 23:08:38
○A47.94.6.1352017-10-09 → 2017-10-09 · 4 obs
○ 2016-08-27 12:26:16
● 2017-10-09 20:48:18
○ 2026-02-25 03:31:02
○ 2026-03-23 23:08:38
● 2017-10-09 20:48:18
○ 2026-02-25 03:31:02
○ 2026-03-23 23:08:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | f.gtld-servers.net, i.gtld-servers.net, k.gtld-servers.net, g.gtld-servers.net... | - |
✅ Authoritative Response
Server:192.12.94.30
NS records: f.gtld-servers.net, i.gtld-servers.net, k.gtld-servers.net, g.gtld-servers.net, b.gtld-servers.net, m.gtld-servers.net, e.gtld-servers.net, d.gtld-servers.net, l.gtld-servers.net, a.gtld-servers.net, h.gtld-servers.net, j.gtld-servers.net, c.gtld-servers.net
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 214ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|