ipnetwork.cz - dns.ninja

ipnetwork.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.ipnetwork.cz ⭐
A81.2.197.168🇨🇿 INTERNET-CZ81.2.192.0/18 INTERNET CZ, a.s.
PTRmx.ipnetwork.cz
TXTv=spf1 mx ip4:81.2.197.167 ip4:81.2.197.168 ~all
SOAns.web4u.czadmin@web4u.cz 2025-12-08 #0

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=1780885036

Subdomains

groupware.ipnetwork.cz
mx.ipnetwork.cz

Same first word

ipnetwork.no
ipnetwork.gr
ipnetwork.co.za
ipnetwork.com.pe
ipnetwork.nl
ipnetwork.co.jp
ipnetwork.ch
ipnetwork.ir
ipnetwork.cz
ipnetwork.eu
ipnetwork.camera
ipnetwork.com.br
ipnetwork.org
ipnetwork.jp
ipnetwork.eti.br
ipnetwork.dk
ipnetwork.co
ipnetwork.net
ipnetwork.de

Similar names

networkpi.com
networkip.com
tinkpower.com
winprotek.com
pinktower.ru
pinktower.edu.sg
pinetwork.de
werkpoint.de
pinetwork.com.au
kriptowne.com
pinetwork.hu
twinpoker.com
pinktower.edu.vn
pinktower.eu
powertink.com
pinetwork.us
networkip.net
werkpoint.com
pinetwork.info
piotrwnek.com
pokerwint.com
pinktower.org
pinktower.com
pinetwork.com
pinetwork.net
pinktower.co.uk
pinetwork.co.uk
wintoperk.at
pinetwork.biz

DNS History

4 records (4 active, 0 former)

20162017201820192020202120222023202420252026NSns.web4u.czns2.web4u.czMXmx.ipnetwork.czA81.91.86.11
●NSns.web4u.cz2015-06-17 → 2026-06-08 · 2 obs
● 2015-06-17 05:17:52
● 2026-06-08 02:33:22
●NSns2.web4u.cz2015-06-17 → 2026-06-08 · 2 obs
● 2015-06-17 05:17:52
● 2026-06-08 02:33:22
●MXmx.ipnetwork.cz2015-06-17 → 2026-06-08 · 2 obs
● 2015-06-17 05:17:52
● 2026-06-08 02:33:22
●A81.91.86.112015-06-17 → 2026-06-08 · 2 obs
● 2015-06-17 05:17:52
● 2026-06-08 02:33:22

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
czb.ns.nic.cz, d.ns.nic.cz, a.ns.nic.cz, c.ns.nic.cz-
ipnetwork.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: 674ms | Queries: -

📄 Records

TypeCountSample Data
A181.91.86.11
NS2ns.web4u.cz, ns2.web4u.cz
MX1mx.ipnetwork.cz (pri: 10)
TXT1v=spf1 mx ip4:81.2.197.167 ip4:81.2.197.
SOA1ns.web4u.cz admin.web4u.cz

📌 Glue Records Collected

Total: 4

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

Analysis

Hierarchy

groupware.ipnetwork.cz and mx.ipnetwork.cz are both subdomains of ipnetwork.cz.

IP Addresses

ipnetwork.cz resolves to one IP address: 81.91.86.11.

unassigned-81-91-82-123.web4u.cz, nrpraha.cz, unassigned-81-91-85-193.web4u.cz and two other host names share IP numbers with ipnetwork.cz.

Name Servers

ipnetwork.cz uses two name servers for its delegation: ns2.web4u.cz and ns.web4u.cz.

ipnetwork.cz uses the same name servers as several other domains — among them swez.cz, uni-shop.cz, 3rsystems.cz and two more.

The two host names ns2.web4u.cz and ns.web4u.cz each have a pair of IP addresses: ns2.web4u.cz has 85.207.53.12 and 2a02:a40:100:28ff::12, and ns.web4u.cz has 185.14.224.241 and 2001:1568:fd::241.

Mail Servers

Mail for ipnetwork.cz is handled by a single mail server, mx.ipnetwork.cz.

ipnetwork.cz uses an identical mail server configuration to several other domains — among them perfecta.cz, znovu.cz, innera.cz and two more.

mx.ipnetwork.cz directs to just one IP number, 81.2.197.168.