jandacek.eu - robtex.com
jandacek.eu
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 77.242.87.6🇨🇿 NEJTV-AS77.242.80.0/20 NEJTV | ||||||
| PTR | host-77-242-87-6.ip.nej.cz | ||||||
| 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 | 2c939d5bd7a17c75.mx2.emailprofi.seznam.cz ⭐ | ||||||
| A | 2a02:598:2::1146🇨🇿 SEZNAM-CZ2a02:598:2::/48 | ||||||
| PTR | wildcard.mx2.emailprofi.seznam.cz | ||||||
| A | 77.75.77.146🇨🇿 SEZNAM-CZ77.75.76.0/23 SEZNAM - III | ||||||
| PTR | wildcard.mx2.emailprofi.seznam.cz | ||||||
| MX | 2c939d5bd7a17c75.mx1.emailprofi.seznam.cz(20) | ||||||
| A | 2a02:598:2::1056🇨🇿 SEZNAM-CZ2a02:598:2::/48 | ||||||
| PTR | wildcard.mx1.emailprofi.seznam.cz | ||||||
| A | 77.75.77.56🇨🇿 SEZNAM-CZ77.75.76.0/23 SEZNAM - III | ||||||
| PTR | wildcard.mx1.emailprofi.seznam.cz | ||||||
| TXT | v=spf1 include:spf.seznam.cz ~all | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2026-04-27 #4 | ||||||
eu
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | si.dns.eu ⭐ | ||||||
| NS | be.dns.eu | ||||||
| NS | w.dns.eu | ||||||
| NS | x.dns.eu | ||||||
| NS | y.dns.eu | ||||||
| SOA | si.dns.eutech@eurid.eu serial=1125821946 | ||||||
Subdomains
Same first word
Similar names
DNS History
8 records (5 active, 3 former)
●MX2c939d5bd7a17c75.mx1.emailprofi.seznam.cz2026-02-23 → 2026-07-05 · 3 obs
● 2026-02-23 07:29:50
● 2026-07-05 13:10:26
●MX2c939d5bd7a17c75.mx2.emailprofi.seznam.cz2026-02-23 → 2026-07-05 · 3 obs
● 2026-02-23 07:29:50
● 2026-07-05 13:10:26
○MXmail.jandacek.eu2015-07-09 → 2018-09-10 · 4 obs
● 2018-09-10 13:34:46
○ 2026-02-23 07:29:50
○ 2026-07-05 13:10:26
○MXmail2.jandacek.eu2015-07-09 → 2018-09-10 · 4 obs
● 2018-09-10 13:34:46
○ 2026-02-23 07:29:50
○ 2026-07-05 13:10:26
●A77.242.87.62026-02-23 → 2026-07-05 · 3 obs
● 2026-02-23 07:29:50
● 2026-07-05 13:10:26
○A81.200.59.1692015-07-09 → 2018-09-10 · 4 obs
● 2018-09-10 13:34:46
○ 2026-02-23 07:29:50
○ 2026-07-05 13:10:26
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| eu | y.dns.eu, w.dns.eu, x.dns.eu, si.dns.eu... | - |
| jandacek.eu | ns2.web4u.cz, ns.web4u.cz | - |
✅ Authoritative Response
Server:85.207.53.12
NS records: ns2.web4u.cz, ns.web4u.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1560ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 77.242.87.6 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 2 | 2c939d5bd7a17c75.mx2.emailprofi.seznam.c, 2c939d5bd7a17c75.mx1.emailprofi.seznam.c |
| TXT | 1 | v=spf1 include:spf.seznam.cz ~all |
| SOA | 1 | ns.web4u.cz admin.web4u.cz |
Analysis
Hierarchy
mail2.jandacek.eu and mail.jandacek.eu each fall under jandacek.eu as their parent domain.
IP Addresses
jandacek.eu resolves to just one IP address, 77.242.87.6.
host-77-242-87-6.ip.nej.cz and mail.jandacek.eu are among other host names that share IP numbers with jandacek.eu.
Name Servers
jandacek.eu is served by two delegated name servers, ns2.web4u.cz and ns.web4u.cz.
jandacek.eu shares its NS records with other domains, for example nozi.cz, metalcomkanban.com, alesfrey.cz and two others.
Each of the two host names carries two IP addresses: ns2.web4u.cz points to 85.207.53.12 and 2a02:a40:100:28ff::12, and ns.web4u.cz points to 185.14.224.241 and 2001:1568:fd::241.
Mail Servers
jandacek.eu is served by two mail servers, 2c939d5bd7a17c75.mx1.emailprofi.seznam.cz and 2c939d5bd7a17c75.mx2.emailprofi.seznam.cz.
Each of the two host names carries two IP addresses: 2c939d5bd7a17c75.mx1.emailprofi.seznam.cz points to 77.75.77.56 and 2a02:598:2::1056, and 2c939d5bd7a17c75.mx2.emailprofi.seznam.cz points to 77.75.77.146 and 2a02:598:2::1146.