mail.4users.cz - robtex.com

mail.4users.cz

DNSSEC⚠️ Not signed
A171.25.220.146🇨🇿 GREENDATA171.25.220.0/23 Greendata s.r.o.
PTRhosting.hefy.cz
TXTv=spf1 +a +mx +ip4:171.25.220.143 +ip4:171.25.220.146 +ip4:109.248.251.44 +ip...

4users.cz

DNSSEC⚠️ Not signed
A171.25.220.146🇨🇿 GREENDATA171.25.220.0/23 Greendata s.r.o.
NSns1.procaln.cz ⭐
NSns2.procaln.cz
NSns3.procaln.cz ⚠️ Not in parent delegation
MXowa.hefy.cz ⭐
MXhosting.hefy.cz(10)
TXTv=spf1 +a +mx +ip4:171.25.220.143 +ip4:171.25.220.146 +ip4:109.248.251.44 +ip...
SOAns1.procaln.czwebmaster@4users.cz 2026-04-20 #4

Previously MX for

procaln.cz
bodytherapy.eu

Same first word

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mail.od.ua
mail.ms
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mail.mydns.vc
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mail.pictures
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DNS History

2 records (1 active, 1 former)

201020122014201620182020202220242026A171.25.220.14689.203.146.55
●A171.25.220.1462026-02-20 → 2026-04-20 · 3 obs
○ 2016-05-06 03:35:58
● 2026-02-20 15:36:28
● 2026-04-20 15:45:32
○A89.203.146.552009-01-15 → 2016-05-06 · 4 obs
● 2009-01-15 15:52:16
● 2016-05-06 03:35:58
○ 2026-02-20 15:36:28
○ 2026-04-20 15:45:32

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cza.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz-
4users.czns1.procaln.cz, ns2.procaln.cz2 records

✅ Authoritative Response

Server:185.248.179.104

NS records: ns1.procaln.cz, ns2.procaln.cz

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 4users.cz (unsigned zone)

⏱️ Timing

Total: 869ms | Queries: -

📄 Records

TypeCountSample Data
A1171.25.220.146
TXT1v=spf1 +a +mx +ip4:171.25.220.143 +ip4:1

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.procaln.cz, ns2.procaln.cz)

Analysis

IP Addresses

mail.4users.cz points to a single IP: 171.25.220.146.

Other host names, for instance 4users.cz, mail.hert.cz, mail.aaheta.cz, geotechnika.eu and hosting.4users.cz share IP numbers with mail.4users.cz.