cacsystems.eu - robtex.com
cacsystems.eu
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 81.91.86.10🇨🇿 WEB4U81.91.80.0/21 | ||||||
| PTR | php4.web4u.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 | mx.web4u.cz ⭐ | ||||||
| A | 2001:1568::7012🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | mx.web4u.cz | ||||||
| A | 81.91.87.12🇨🇿 WEB4U81.91.80.0/21 | ||||||
| PTR | mx.web4u.cz | ||||||
| TXT | v=spf1 include:_spf.web4u.cz ~all | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2024-10-08 #1 | ||||||
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=1122764856 | ||||||
Same first word
cacsystems.com |
cacsystems.cz |
cacsystems.eu |
Similar names
DNS History
5 records (4 active, 1 former)
○MXmail.cacsystems.eu2015-07-12 → 2017-02-07 · 4 obs
● 2017-02-07 15:32:32
○ 2020-02-28 00:28:16
○ 2026-03-29 05:56:48
●MXmx.web4u.cz2020-02-28 → 2026-03-29 · 3 obs
● 2020-02-28 00:28:16
● 2026-03-29 05:56:48
●A81.91.86.102015-07-12 → 2026-03-29 · 2 obs
● 2026-03-29 05:56:48
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| eu | be.dns.eu, x.dns.eu, y.dns.eu, w.dns.eu... | - |
| cacsystems.eu | ns2.web4u.cz, ns.web4u.cz | - |
✅ Authoritative Response
Server:185.14.224.241
NS records: ns2.web4u.cz, ns.web4u.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1003ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.86.10 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 1 | mx.web4u.cz (pri: 10) |
| TXT | 1 | v=spf1 include:_spf.web4u.cz ~all |
| SOA | 1 | ns.web4u.cz admin.web4u.cz |
Analysis
IP Addresses
cacsystems.eu resolves to a single IP address: 81.91.86.10.
Other host names including weilovna.cz, ello.cz, phpmyadmin.bef.cz, netmarket.cz and www.2p.cz share IP numbers with cacsystems.eu.
Name Servers
cacsystems.eu's delegation uses two name servers, ns2.web4u.cz and ns.web4u.cz.
cacsystems.eu shares the same name server setup as other domains, for example alexel.cz, atuna.cz, kalny.cz, tmej.eu and uninet.cz.
Host names with two IPs:
ns2.web4u.cz points to: 2a02:a40:100:28ff::12 and 85.207.53.12
ns.web4u.cz points to: 2001:1568:fd::241 and 185.14.224.241
Mail Servers
cacsystems.eu is handled by a single mail server, mx.web4u.cz.
cacsystems.eu shares its mail server setup with other domains, including rwg.cz, parfus.eu, kukacka.cz, diametral.pl and andro(0x706f726e).com.
The mail servers for cacsystems.eu are shared with other domains, for instance smart4smart.cz, basic-numbers.com, denisaadolfova.com, kekesi.cz and c42.cz.
mx.web4u.cz points to two IPs: 2001:1568::7012 and 81.91.87.12.