mail.bsit.cz - robtex.com

mail.bsit.cz

DNSSEC⚠️ Not signed
A2001:1568:f::386🇨🇿 WEB4U2001:1568::/33
PTRvs386.server4u.cz
A81.91.85.195🇨🇿 WEB4U81.91.80.0/21

bsit.cz

DNSSEC🔒 Signed (DS record present)
A2001:1568:f::386🇨🇿 WEB4U2001:1568::/33
A81.91.85.195🇨🇿 WEB4U81.91.80.0/21
NSns2.web4u.cz ⭐
NSns.web4u.cz
MXmail.bsit.cz ⭐
TXTMS=ms92668323
TXTv=spf1 mx a ip4:81.91.85.195 ip4:94.143.172.115 a:vs386.server4u.cz a:188-175...
SOAns.web4u.czadmin@web4u.cz 2026-04-22 #0

MX for

bsit.cz

Same first word

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DNS History

2 records (2 active, 0 former)

20162017201820192020202120222023202420252026A2001:1568:f::38681.91.85.195
●A2001:1568:f::3862026-03-24 → 2026-05-14 · 3 obs
○ 2015-08-12 12:28:24
● 2026-03-24 16:09:16
● 2026-05-14 09:14:32
●A81.91.85.1952015-08-12 → 2026-05-14 · 2 obs
● 2015-08-12 12:28:24
● 2026-05-14 09:14:32

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
czd.ns.nic.cz, c.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz-
bsit.czns.web4u.cz, ns2.web4u.cz4 records

✅ Authoritative Response

Server:185.14.224.241

NS records: ns.web4u.cz, ns2.web4u.cz

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1595ms | Queries: -

📄 Records

TypeCountSample Data
A181.91.85.195
AAAA12001:1568:f::386

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns.web4u.cz, ns.web4u.cz, ns2.web4u.cz...)

Analysis

Mail Server Role

mail.bsit.cz serves as the mail server for bsit.cz.

IP Addresses

mail.bsit.cz points to two IPs: 2001:1568:f::386 and 81.91.85.195.

Other host names including mail.svetelektra.com, svetelektra.com, mail.preiss.cz, mail.lhc.cz and snowgarden.eu share IP numbers with mail.bsit.cz.