21server.com - robtex.com
21server.com
| CNAME | s.821yo.com | ||||||
| DNSSEC | ⚠️ Not signed | ||||||
| A | 49.235.137.50🇨🇳 TENCENT-NET-AP49.235.128.0/20 | ||||||
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=1776056727 | ||||||
Previously MX for
21server.com |
Subdomains
ns4.21server.com |
Same first word
21server.com |
Similar names
server21.info |
server12.xyz |
server12.nl |
server21.eu |
server21.com |
server21.it |
server12.ru |
server21.org |
server12.com |
server12.de |
DNS History
9 records (3 active, 6 former)
●NSdns15.hichina.com2026-04-06 → 2026-04-13 · 3 obs
○ 2017-06-14 02:56:12
● 2026-04-06 12:02:30
● 2026-04-13 05:08:20
● 2026-04-06 12:02:30
● 2026-04-13 05:08:20
●NSdns16.hichina.com2026-04-06 → 2026-04-13 · 3 obs
○ 2017-06-14 02:56:12
● 2026-04-06 12:02:30
● 2026-04-13 05:08:20
● 2026-04-06 12:02:30
● 2026-04-13 05:08:20
○NSns1.coolvds.com2015-07-23 → 2017-06-14 · 4 obs
● 2015-07-23 18:59:54
● 2017-06-14 02:56:12
○ 2026-04-06 12:02:30
○ 2026-04-13 05:08:20
● 2017-06-14 02:56:12
○ 2026-04-06 12:02:30
○ 2026-04-13 05:08:20
○NSns2.coolvds.com2015-07-23 → 2017-06-14 · 4 obs
● 2015-07-23 18:59:54
● 2017-06-14 02:56:12
○ 2026-04-06 12:02:30
○ 2026-04-13 05:08:20
● 2017-06-14 02:56:12
○ 2026-04-06 12:02:30
○ 2026-04-13 05:08:20
○NSns3.coolvds.com2015-07-23 → 2017-06-14 · 4 obs
● 2015-07-23 18:59:54
● 2017-06-14 02:56:12
○ 2026-04-06 12:02:30
○ 2026-04-13 05:08:20
● 2017-06-14 02:56:12
○ 2026-04-06 12:02:30
○ 2026-04-13 05:08:20
○NSns4.coolvds.com2015-07-23 → 2017-06-14 · 4 obs
● 2015-07-23 18:59:54
● 2017-06-14 02:56:12
○ 2026-04-06 12:02:30
○ 2026-04-13 05:08:20
● 2017-06-14 02:56:12
○ 2026-04-06 12:02:30
○ 2026-04-13 05:08:20
○MX21server.com2015-07-23 → 2017-06-14 · 4 obs
● 2015-07-23 18:59:54
● 2017-06-14 02:56:12
○ 2026-04-06 12:02:30
○ 2026-04-13 05:08:20
● 2017-06-14 02:56:12
○ 2026-04-06 12:02:30
○ 2026-04-13 05:08:20
○A185.66.10.1022015-07-23 → 2017-06-14 · 4 obs
● 2015-07-23 18:59:54
● 2017-06-14 02:56:12
○ 2026-04-06 12:02:30
○ 2026-04-13 05:08:20
● 2017-06-14 02:56:12
○ 2026-04-06 12:02:30
○ 2026-04-13 05:08:20
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | m.gtld-servers.net, j.gtld-servers.net, i.gtld-servers.net, f.gtld-servers.net... | - |
| 21server.com | dns15.hichina.com, dns16.hichina.com | 18 records |
✅ Authoritative Response
Server:120.76.107.41
NS records: dns15.hichina.com, dns16.hichina.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 21server.com (unsigned zone)
⏱️ Timing
Total: 515ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | dns15.hichina.com, dns16.hichina.com |
| CNAME | 1 | s.821yo.com |
| SOA | 1 | dns15.hichina.com hostmaster.hichina.com |
📌 Glue Records Collected
Total: 18
Out-of-bailiwick: 18 (dns15.hichina.com, dns15.hichina.com, dns15.hichina.com...)
Analysis
Hierarchy
The parent of ns4.21server.com is 21server.com.
IP Addresses
21server.com points to an IP address: 49.235.137.50.
Other host names, for instance s.821yo.com, share IP numbers with 21server.com.