email.sdengineering.cz - robtex.com

email.sdengineering.cz

DNSSEC⚠️ Not signed
A88.103.126.204🇨🇿 O2-CZECH-REPUBLIC88.100.0.0/14 CZ.CZNET
PTRemail.sdengineering.cz

sdengineering.cz

DNSSEC⚠️ Not signed
A2001:67c:e94:1:1:5bef:c90a:1Blindspot2001:67c:e94::/48 THINLINE-BlindSpot
A91.239.201.10🇨🇿 Blindspot91.239.200.0/23 THINLINE-BlindSpot
NSns1.thinline.cz ⭐
NSns2.thinline.cz
NSns3.cesky-hosting.eu
MXmail.sdengineering.cz ⭐
MXemail.sdengineering.cz(10)
TXTv=spf1 mx a:replikant4090.thinline.cz include:spf.spolehlive-servery.cz inclu...
SOAns1.thinline.czhostmaster@sdengineering.cz serial=20253704

PTR for

204.126.103.88.in-addr.arpa

MX for

sdengineering.cz

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DNS History

2 records (1 active, 1 former)

20162017201820192020202120222023202420252026A88.103.126.20484.242.109.61
○A84.242.109.612015-07-16 → 2016-07-07 · 4 obs
● 2015-07-16 20:05:40
● 2016-07-07 03:17:58
○ 2026-06-12 14:51:44
○ 2026-06-18 10:19:34
●A88.103.126.2042026-06-12 → 2026-06-18 · 3 obs
○ 2016-07-07 03:17:58
● 2026-06-12 14:51:44
● 2026-06-18 10:19:34

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cza.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz-
sdengineering.czns2.thinline.cz, ns3.cesky-hosting.eu, ns1.thinline.cz4 records

✅ Authoritative Response

Server:91.239.200.243

NS records: ns2.thinline.cz, ns3.cesky-hosting.eu, ns1.thinline.cz

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sdengineering.cz (unsigned zone)

⏱️ Timing

Total: 1114ms | Queries: -

📄 Records

TypeCountSample Data
A188.103.126.204

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns2.thinline.cz, ns1.thinline.cz, ns2.thinline.cz...)

Analysis

Mail Server Role

Mail for sdengineering.cz is routed through the mail server email.sdengineering.cz.

As mail servers, mail.sdengineering.cz and email.sdengineering.cz are regularly found together.

IP Addresses

email.sdengineering.cz has exactly one IP address — 88.103.126.204.

mail.sdengineering.cz, for instance, is one of the other host names sharing IP numbers with email.sdengineering.cz.