smtp.flexzen.app - robtex.com

smtp.flexzen.app

DNSSEC⚠️ Not signed
A171.244.143.43🇻🇳 VTDC-AS-VN171.244.140.0/22 Proxy-registered route object

flexzen.app

DNSSEC⚠️ Not signed
A103.221.223.163🇻🇳 AZDIGI-AS-VN103.221.220.0/22 AZDIGI-VN
NSns1.zonedns.vn ⭐
NSns2.zonedns.vn
NSns3.zonedns.vn
NSns4.zonedns.vn ⚠️ Not in zone NS records
MXsmtp.flexzen.app ⭐
SOAns1.zonedns.vnroot@flexzen.app 2026-04-08 #3

MX for

flexzen.app

Same first word

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DNS History

1 record (1 active, 0 former)

A171.244.143.43
●A171.244.143.432026-05-08 → 2026-05-11 · 2 obs
● 2026-05-08 17:56:02
● 2026-05-11 15:38:16

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
appns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com...-
flexzen.appns3.zonedns.vn, ns1.zonedns.vn, ns2.zonedns.vn, ns4.zonedns.vn-

✅ Authoritative Response

Server:103.28.36.30

NS records: ns3.zonedns.vn, ns1.zonedns.vn, ns2.zonedns.vn, ns4.zonedns.vn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for flexzen.app (unsigned zone)

⏱️ Timing

Total: 1698ms | Queries: -

📄 Records

TypeCountSample Data
A1171.244.143.43

Analysis

Mail Server Role

smtp.flexzen.app serves as the mail server for flexzen.app.

IP Addresses

smtp.flexzen.app resolves to a single IP: 171.244.143.43.

Other host names share IP numbers with smtp.flexzen.app; for instance mail.quochuy.com.