mail.21.net.cn - robtex.com

mail.21.net.cn

DNSSEC⚠️ Not signed

21.net.cn

DNSSEC⚠️ Not signed
NSns1.judns.com ⚠️ Not in zone NS records
NSns1.julydns.com ⚠️ Not in parent delegation
NSns2.judns.com ⚠️ Not in zone NS records
NSns2.julydns.com ⚠️ Not in parent delegation

Previously MX for

21.net.cn

Same first word

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mail.pf
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mail.uy
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mail.cd
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mail.go.kr
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mail.wedding
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mail.tf
mail.ba
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mail.ki
mail.lima-city.de
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mail.microsoft
mail.mil.tw
mail.org.in
mail.deals
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DNS History

1 record (0 active, 1 former)

20162017201820192020202120222023202420252026A218.25.243.55
○A218.25.243.552015-07-12 → 2021-09-24 · 4 obs
● 2015-07-12 03:54:50
● 2021-09-24 09:49:58
○ 2026-04-13 17:01:50
○ 2026-04-13 17:01:52

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cna.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn...-
21.net.cnns1.judns.com, ns2.judns.com-

✅ Authoritative Response

Server:47.97.51.45

NS records: ns1.judns.com, ns2.judns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21.net.cn (unsigned zone)

⏱️ Timing

Total: 1441ms | Queries: -

📄 Records

TypeCountSample Data