ns4.21server.com - robtex.com

ns4.21server.com

CNAMEs.821yo.com
DNSSEC⚠️ Not signed
A49.235.137.50🇨🇳 TENCENT-NET-AP49.235.128.0/20

21server.com

CNAMEs.821yo.com
DNSSEC⚠️ Not signed
A49.235.137.50🇨🇳 TENCENT-NET-AP49.235.128.0/20

Same first word

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sn4.org
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DNS History

2 records (1 active, 1 former)

20162017201820192020202120222023202420252026A185.66.10.102CNAMEs.821yo.com
○A185.66.10.1022015-05-19 → 2016-04-07 · 4 obs
● 2015-05-19 21:29:24
● 2016-04-07 11:33:02
○ 2026-04-06 12:02:30
○ 2026-04-13 20:04:52
●CNAMEs.821yo.com2026-04-06 → 2026-04-13 · 2 obs
● 2026-04-06 12:02:30
● 2026-04-13 20:04:52

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comh.gtld-servers.net, k.gtld-servers.net, i.gtld-servers.net, g.gtld-servers.net...-
21server.comdns15.hichina.com, dns16.hichina.com18 records

✅ Authoritative Response

Server:120.76.107.42

NS records: dns15.hichina.com, dns16.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21server.com (unsigned zone)

⏱️ Timing

Total: 651ms | Queries: -

📄 Records

TypeCountSample Data
CNAME1s.821yo.com

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns15.hichina.com, dns15.hichina.com, dns15.hichina.com...)

Analysis

IP Addresses

ns4.21server.com points to IP number: 49.235.137.50.

Other host names, for instance s.821yo.com share IP numbers with ns4.21server.com.