ioe.cz - robtex.com

ioe.cz

DNSSEC🔒 Signed (DS record present)
A81.91.86.14🇨🇿 WEB4U81.91.80.0/21
PTRphp7.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.ioe.cz ⭐
A85.235.147.102🇮🇹 ARUBA-ASN85.235.128.0/19
PTRmx.ioe.cz
TXTv=spf1 mx ip4: 85.235.147.102 -all
SOAns.web4u.czadmin@web4u.cz 2025-07-11 #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=1784953042

Subdomains

mx.ioe.cz
www.ioe.cz

Same first word

ioe.vn
ioe.jp
ioe.org.au
ioe.it
ioe.cn
ioe.hk
ioe.es
ioe.me
ioe.se
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ioe.ae
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ioe.energy
ioe.eu
ioe.com.cn
ioe.ac.cn
ioe.no
ioe.be
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ioe.com.vn
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ioe.su
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ioe.in
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ioe.city
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ioe.solutions
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ioe.cisco

Similar names

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ieo.eu
oie.co.uk
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ieo.ca
eio.be
ieo.se
ieo.dk
ieo.org
eio.at
oie.com.au
ieo.ch
oie.idv.tw

DNS History

21 records (4 active, 17 former)

20162017201820192020202120222023202420252026NSns.web4u.czns2.web4u.czns.wedos.comns.wedos.czns.wedos.euns.wedos.netns1.tele3.czns2.tele3.czns3.tele3.czns4.tele3.euns4.tele3.skMXmx.ioe.czA81.91.86.14138.201.5.1292a01:4f8:171:10d1::1292a01:5e0:26::1762a01:5f0:c001:124:2::1672a02:2b88:1:4::1646.28.105.288.146.242.17689.187.149.167
●NSns.web4u.cz2026-06-27 → 2026-07-25 · 3 obs
○ 2021-04-08 06:17:50
● 2026-06-27 13:19:42
● 2026-07-25 04:25:46
○NSns.wedos.com2021-04-08 → 2021-04-08 · 4 obs
○ 2021-03-04 10:31:12
● 2021-04-08 06:17:50
○ 2026-06-27 13:19:42
○ 2026-07-25 04:25:46
○NSns.wedos.cz2021-04-08 → 2021-04-08 · 4 obs
○ 2021-03-04 10:31:12
● 2021-04-08 06:17:50
○ 2026-06-27 13:19:42
○ 2026-07-25 04:25:46
○NSns.wedos.eu2021-04-08 → 2021-04-08 · 4 obs
○ 2021-03-04 10:31:12
● 2021-04-08 06:17:50
○ 2026-06-27 13:19:42
○ 2026-07-25 04:25:46
○NSns.wedos.net2021-04-08 → 2021-04-08 · 4 obs
○ 2021-03-04 10:31:12
● 2021-04-08 06:17:50
○ 2026-06-27 13:19:42
○ 2026-07-25 04:25:46
○NSns1.tele3.cz2015-08-26 → 2017-08-23 · 8 obs
● 2015-08-26 14:12:12
● 2015-12-13 20:20:40
○ 2016-01-03 04:05:24
○ 2016-01-15 10:32:54
● 2016-05-27 10:25:56
● 2017-08-23 22:16:10
○ 2021-03-04 10:31:12
○ 2026-07-25 04:25:46
○NSns2.tele3.cz2015-08-26 → 2017-08-23 · 8 obs
● 2015-08-26 14:12:12
● 2015-12-13 20:20:40
○ 2016-01-03 04:05:24
○ 2016-01-15 10:32:54
● 2016-05-27 10:25:56
● 2017-08-23 22:16:10
○ 2021-03-04 10:31:12
○ 2026-07-25 04:25:46
●NSns2.web4u.cz2026-06-27 → 2026-07-25 · 3 obs
○ 2021-04-08 06:17:50
● 2026-06-27 13:19:42
● 2026-07-25 04:25:46
○NSns3.tele3.cz2015-08-26 → 2017-08-23 · 8 obs
● 2015-08-26 14:12:12
● 2015-12-13 20:20:40
○ 2016-01-03 04:05:24
○ 2016-01-15 10:32:54
● 2016-05-27 10:25:56
● 2017-08-23 22:16:10
○ 2021-03-04 10:31:12
○ 2026-07-25 04:25:46
○NSns4.tele3.eu2015-11-01 → 2017-08-23 · 9 obs
○ 2015-08-26 14:12:12
● 2015-11-01 02:46:04
● 2015-12-13 20:20:40
○ 2016-01-03 04:05:24
○ 2016-01-15 10:32:54
● 2016-05-27 10:25:56
● 2017-08-23 22:16:10
○ 2021-03-04 10:31:12
○ 2026-07-25 04:25:46
○NSns4.tele3.sk2015-08-26 → 2015-08-26 · 3 obs
● 2015-08-26 14:12:12
○ 2015-11-01 02:46:04
○ 2026-07-25 04:25:46
●MXmx.ioe.cz2026-06-27 → 2026-07-25 · 2 obs
● 2026-06-27 13:19:42
● 2026-07-25 04:25:46
○A138.201.5.1292016-05-27 → 2016-08-19 · 5 obs
○ 2016-01-03 04:05:24
● 2016-05-27 10:25:56
● 2016-08-19 18:27:46
○ 2016-11-30 03:19:38
○ 2026-07-25 04:25:46
○A2a01:4f8:171:10d1::1292016-05-27 → 2016-08-19 · 5 obs
○ 2016-01-03 04:05:24
● 2016-05-27 10:25:56
● 2016-08-19 18:27:46
○ 2016-11-30 03:19:38
○ 2026-07-25 04:25:46
○A2a01:5e0:26::1762015-08-26 → 2015-12-13 · 4 obs
● 2015-08-26 14:12:12
● 2015-12-13 20:20:40
○ 2016-01-03 04:05:24
○ 2026-07-25 04:25:46
○A2a01:5f0:c001:124:2::1672016-11-30 → 2017-08-23 · 5 obs
○ 2016-08-19 18:27:46
● 2016-11-30 03:19:38
● 2017-08-23 22:16:10
○ 2021-03-04 10:31:12
○ 2026-07-25 04:25:46
○A2a02:2b88:1:4::162021-04-08 → 2021-04-08 · 4 obs
○ 2021-03-04 10:31:12
● 2021-04-08 06:17:50
○ 2026-06-27 13:19:42
○ 2026-07-25 04:25:46
○A46.28.105.22021-04-08 → 2021-04-08 · 4 obs
○ 2021-03-04 10:31:12
● 2021-04-08 06:17:50
○ 2026-06-27 13:19:42
○ 2026-07-25 04:25:46
●A81.91.86.142026-06-27 → 2026-07-25 · 3 obs
○ 2021-04-08 06:17:50
● 2026-06-27 13:19:42
● 2026-07-25 04:25:46
○A88.146.242.1762015-08-26 → 2015-12-13 · 4 obs
● 2015-08-26 14:12:12
● 2015-12-13 20:20:40
○ 2016-01-03 04:05:24
○ 2026-07-25 04:25:46
○A89.187.149.1672016-11-30 → 2017-08-23 · 5 obs
○ 2016-08-19 18:27:46
● 2016-11-30 03:19:38
● 2017-08-23 22:16:10
○ 2021-03-04 10:31:12
○ 2026-07-25 04:25:46

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cza.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz-
ioe.czns.web4u.cz, ns2.web4u.cz4 records

✅ Authoritative Response

Server:85.207.53.12

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

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 999ms | Queries: -

📄 Records

TypeCountSample Data
A181.91.86.14
NS2ns.web4u.cz, ns2.web4u.cz
MX1mx.ioe.cz (pri: 10)
TXT1v=spf1 mx ip4: 85.235.147.102 -all
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

Hierarchy

ioe.cz serves as the parent of mx.ioe.cz and www.ioe.cz.

IP Addresses

ioe.cz has exactly one IP address — 81.91.86.14.

ledoian.cz, narex.be, lagrace.eu plus two other host names have IP numbers in common with ioe.cz.

Name Servers

The NS records for ioe.cz delegate to ns2.web4u.cz and ns.web4u.cz.

The name server configuration of ioe.cz is shared with other domains, for instance alis.cz, rkservis.com, onholidays.net and two others.

ns2.web4u.cz resolves to 85.207.53.12 and 2a02:a40:100:28ff::12. Likewise, ns.web4u.cz resolves to 185.14.224.241 and 2001:1568:fd::241 — two IP addresses apiece.

Mail Servers

ioe.cz uses one mail server — mx.ioe.cz.

mx.ioe.cz resolves to 85.235.147.102 and no other IP number.