21chinaedu.com - robtex.com
21chinaedu.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=1777220936 | ||||||
Same first word
21chinaedu.com |
DNS History
9 records (0 active, 9 former)
○NSdns7.hichina.com2015-06-26 → 2026-04-10 · 4 obs
○ 2008-03-15 00:39:38
● 2015-06-26 18:47:04
● 2026-04-10 16:34:06
○ 2026-04-26 16:51:24
● 2015-06-26 18:47:04
● 2026-04-10 16:34:06
○ 2026-04-26 16:51:24
○NSdns8.hichina.com2015-06-26 → 2026-04-10 · 4 obs
○ 2008-03-15 00:39:38
● 2015-06-26 18:47:04
● 2026-04-10 16:34:06
○ 2026-04-26 16:51:24
● 2015-06-26 18:47:04
● 2026-04-10 16:34:06
○ 2026-04-26 16:51:24
○NSexpirens3.hichina.com2026-04-10 → 2026-04-10 · 3 obs
○ 2015-06-26 18:47:04
● 2026-04-10 16:34:06
○ 2026-04-26 16:51:24
● 2026-04-10 16:34:06
○ 2026-04-26 16:51:24
○NSexpirens4.hichina.com2026-04-10 → 2026-04-10 · 3 obs
○ 2015-06-26 18:47:04
● 2026-04-10 16:34:06
○ 2026-04-26 16:51:24
● 2026-04-10 16:34:06
○ 2026-04-26 16:51:24
○NSns.xinnet.cn2008-03-15 → 2008-03-15 · 3 obs
● 2008-03-15 00:39:38
○ 2015-06-26 18:47:04
○ 2026-04-26 16:51:24
○ 2015-06-26 18:47:04
○ 2026-04-26 16:51:24
○NSns.xinnetdns.com2008-03-15 → 2008-03-15 · 3 obs
● 2008-03-15 00:39:38
○ 2015-06-26 18:47:04
○ 2026-04-26 16:51:24
○ 2015-06-26 18:47:04
○ 2026-04-26 16:51:24
○A221.174.24.662008-03-15 → 2008-03-15 · 3 obs
● 2008-03-15 00:39:38
○ 2015-06-26 18:47:04
○ 2026-04-26 16:51:24
○ 2015-06-26 18:47:04
○ 2026-04-26 16:51:24
○CNAMEexpired.hichina.com2026-04-10 → 2026-04-10 · 3 obs
○ 2015-06-26 18:47:04
● 2026-04-10 16:34:06
○ 2026-04-26 16:51:24
● 2026-04-10 16:34:06
○ 2026-04-26 16:51:24
○CNAMEmx.hj.chinaeea.com2008-03-15 → 2008-03-15 · 3 obs
● 2008-03-15 00:39:38
○ 2015-06-26 18:47:04
○ 2026-04-26 16:51:24
○ 2015-06-26 18:47:04
○ 2026-04-26 16:51:24
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
✅ Authoritative Response
Server:192.54.112.30
NS records: a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net, e.gtld-servers.net, f.gtld-servers.net, g.gtld-servers.net, h.gtld-servers.net, i.gtld-servers.net, j.gtld-servers.net, k.gtld-servers.net, l.gtld-servers.net, m.gtld-servers.net
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 235ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|