blachere.cz - robtex.com

blachere.cz

DNSSEC🔒 Signed (DS record present)
A81.91.86.11🇨🇿 WEB4U81.91.80.0/21
PTRphp5.web4u.cz
NSns2.web4u.cz ⭐
A2a02:a40:100:28ff::12🇨🇿 BlueTone-AS2a02:a40::/32 Ceske Radiokomunikace, a.s.
PTRns2.web4u.cz
A85.207.53.12🇨🇿 BlueTone-AS85.207.0.0/16 BlueTone-CRa-CZ Fourth address block
PTRns2.web4u.cz
NSns.web4u.cz
A2001:1568:fd::241🇨🇿 WEB4U2001:1568::/33
PTRns.web4u.cz
A185.14.224.241🇨🇿 WEB4U185.14.224.0/23
PTRns.web4u.cz
MXmx.web4u.cz ⭐
A2001:1568::7012🇨🇿 WEB4U2001:1568::/33
PTRmx.web4u.cz
A81.91.87.12🇨🇿 WEB4U81.91.80.0/21
PTRmx.web4u.cz
SOAns.web4u.czadmin@web4u.cz 2011-05-13 #1

cz

DNSSEC🔒 Signed (DS record present)
NSa.ns.nic.cz ⭐
NSb.ns.nic.cz
NSc.ns.nic.cz
NSd.ns.nic.cz
SOAa.ns.nic.czhostmaster@nic.cz serial=1784470642

Same first word

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blachere.eu
blachere.co.uk
blachere.nl
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blachere.at
blachere.fr
blachere.com.mx
blachere.com

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DNS History

5 records (4 active, 1 former)

20162017201820192020202120222023202420252026NSns.web4u.czns2.web4u.czMXmx.web4u.czmail.blachere.czA81.91.86.11
●NSns.web4u.cz2015-07-16 → 2026-07-19 · 2 obs
● 2015-07-16 00:54:54
● 2026-07-19 14:42:24
●NSns2.web4u.cz2015-07-16 → 2026-07-19 · 2 obs
● 2015-07-16 00:54:54
● 2026-07-19 14:42:24
○MXmail.blachere.cz2015-07-16 → 2019-04-11 · 4 obs
● 2015-07-16 00:54:54
● 2019-04-11 10:42:10
○ 2026-06-13 10:21:38
○ 2026-07-19 14:42:24
●MXmx.web4u.cz2026-06-13 → 2026-07-19 · 3 obs
○ 2019-04-11 10:42:10
● 2026-06-13 10:21:38
● 2026-07-19 14:42:24
●A81.91.86.112015-07-16 → 2026-07-19 · 2 obs
● 2015-07-16 00:54:54
● 2026-07-19 14:42:24

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
czd.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz-
blachere.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: 848ms | Queries: -

📄 Records

TypeCountSample Data
A181.91.86.11
NS2ns.web4u.cz, ns2.web4u.cz
MX1mx.web4u.cz (pri: 10)
SOA1ns.web4u.cz admin.web4u.cz

📌 Glue Records Collected

Total: 4

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

Analysis

IP Addresses

blachere.cz points to a single IP number: 81.91.86.11.

Additional host names — unassigned-81-91-81-31.web4u.cz, unassigned-81-91-86-227.web4u.cz, potc.cz and two others — share IP numbers with blachere.cz.

Name Servers

DNS delegation for blachere.cz points to two name servers: ns2.web4u.cz and ns.web4u.cz.

blachere.cz shares its name server setup with other domains, including magicsound.cz, skolit.cz, goldstyle.cz and two others.

ns2.web4u.cz directs to 85.207.53.12 and 2a02:a40:100:28ff::12. ns.web4u.cz directs to 185.14.224.241 and 2001:1568:fd::241. Each host name carries two IP addresses.

Mail Servers

blachere.cz has one mail server: mx.web4u.cz.

blachere.cz shares the same mail server setup as other domains, including absintherepublic.cz, netigo.it, bado.cz and two others.

Some mail servers of blachere.cz are also used by other domains, notably euroimpex.cz and meva.cz.

mx.web4u.cz carries two IP numbers: 81.91.87.12 and 2001:1568::7012.