o106.cz - robtex.com
o106.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 2001:1568::14🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | php7.web4u.cz | ||||||
| A | 81.91.86.14🇨🇿 WEB4U81.91.80.0/21 | ||||||
| NS | ns2.web4u.cz ⭐ | ||||||
| A | 2a02:a40:100:28ff::12🇨🇿 BlueTone-AS2a02:a40::/32 Ceske Radiokomunikace, a.s. | ||||||
| PTR | ns2.web4u.cz | ||||||
| A | 85.207.53.12🇨🇿 BlueTone-AS85.207.0.0/16 BlueTone-CRa-CZ Fourth address block | ||||||
| PTR | ns2.web4u.cz | ||||||
| NS | ns.web4u.cz | ||||||
| A | 2001:1568:fd::241🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | ns.web4u.cz | ||||||
| A | 185.14.224.241🇨🇿 WEB4U185.14.224.0/23 | ||||||
| PTR | ns.web4u.cz | ||||||
| MX | mx.web4u.cz ⭐ | ||||||
| A | 2001:1568::7012🇨🇿 WEB4U2001:1568::/33 | ||||||
| A | 81.91.87.12🇨🇿 WEB4U81.91.80.0/21 | ||||||
| PTR | mx.web4u.cz | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2018-03-22 #1 | ||||||
cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.ns.nic.cz ⭐ | ||||||
| NS | b.ns.nic.cz | ||||||
| NS | c.ns.nic.cz | ||||||
| NS | d.ns.nic.cz | ||||||
| SOA | a.ns.nic.czhostmaster@nic.cz serial=1786533443 | ||||||
Same first word
Similar names
DNS History
13 records (5 active, 8 former)
●NSns.web4u.cz2026-03-21 → 2026-08-12 · 3 obs
● 2026-03-21 09:18:20
● 2026-08-12 11:25:50
○NSns1.tele3.cz2015-07-09 → 2017-03-21 · 4 obs
● 2017-03-21 05:45:32
○ 2026-03-21 09:18:20
○ 2026-08-12 11:25:50
○NSns2.tele3.cz2015-07-09 → 2017-03-21 · 4 obs
● 2017-03-21 05:45:32
○ 2026-03-21 09:18:20
○ 2026-08-12 11:25:50
●NSns2.web4u.cz2026-03-21 → 2026-08-12 · 3 obs
● 2026-03-21 09:18:20
● 2026-08-12 11:25:50
○NSns3.tele3.cz2015-07-09 → 2017-03-21 · 4 obs
● 2017-03-21 05:45:32
○ 2026-03-21 09:18:20
○ 2026-08-12 11:25:50
○NSns4.tele3.eu2015-11-11 → 2017-03-21 · 5 obs
● 2015-11-11 08:59:00
● 2017-03-21 05:45:32
○ 2026-03-21 09:18:20
○ 2026-08-12 11:25:50
○NSns4.tele3.sk2015-07-09 → 2015-07-09 · 3 obs
○ 2015-11-11 08:59:00
○ 2026-08-12 11:25:50
○A138.201.5.1372016-05-09 → 2016-05-09 · 4 obs
● 2016-05-09 19:30:16
○ 2017-03-21 05:45:32
○ 2026-08-12 11:25:50
●A2001:1568::142026-03-21 → 2026-08-12 · 3 obs
● 2026-03-21 09:18:20
● 2026-08-12 11:25:50
●A81.91.86.142026-03-21 → 2026-08-12 · 3 obs
● 2026-03-21 09:18:20
● 2026-08-12 11:25:50
○A88.146.242.1622015-07-09 → 2016-02-03 · 4 obs
● 2016-02-03 15:49:44
○ 2016-05-09 19:30:16
○ 2026-08-12 11:25:50
○A89.187.149.1342017-03-21 → 2017-03-21 · 4 obs
● 2017-03-21 05:45:32
○ 2026-03-21 09:18:20
○ 2026-08-12 11:25:50
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | d.ns.nic.cz, b.ns.nic.cz, a.ns.nic.cz, c.ns.nic.cz | - |
| o106.cz | ns.web4u.cz, ns2.web4u.cz | 4 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: 600ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.86.14 |
| AAAA | 1 | 2001:1568::14 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 1 | mx.web4u.cz (pri: 10) |
| SOA | 1 | ns.web4u.cz admin.web4u.cz |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns.web4u.cz, ns.web4u.cz, ns2.web4u.cz...)
Analysis
IP Addresses
o106.cz directs to two IP numbers, 81.91.86.14 and 2001:1568::14
Additional host names — hostmaster.loopo.fr, starz.cz, www.pentagroup.cz and two others — share IP numbers with o106.cz.
Name Servers
The NS records for o106.cz delegate to ns2.web4u.cz and ns.web4u.cz.
o106.cz shares its name server setup with other domains, including certik.cz, puttpd.cz, red-peppers.cz 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
o106.cz has one mail server: mx.web4u.cz.
o106.cz shares the same mail server setup as other domains, including cmta.eu, caminodesantiago.cz, avmcorp.com and two others.
o106.cz shares mail servers — at least in part — with other domains, including ixio.cz, mbtrans.cz, mataki.gr and two others.
mx.web4u.cz points to two IP addresses: 81.91.87.12 and 2001:1568::7012.