clever-system.cz - robtex.com
clever-system.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 31.15.10.184🇨🇿 ACTIVE24-AS31.15.8.0/21 CZ-ACTIVE24-NET2 | ||||||
| PTR | uvirt130.active24.cz | ||||||
| NS | alfa.ns.active24.cz ⭐ | ||||||
| A | 2a02:4a8:ac24:100::96:2🇨🇿 ACTIVE24-AS2a02:4a8::/32 CZ-ACTIVE24-NET6 | ||||||
| PTR | alfa.ns.active24.cz | ||||||
| A | 81.95.96.2🇨🇿 ACTIVE24-AS81.95.96.0/20 CZ-ACTIVE24-NET1 | ||||||
| PTR | alfa.ns.active24.cz | ||||||
| NS | beta.ns.active24.cz | ||||||
| A | 2a00:4b40:1000:590:185:111:90:94🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32 | ||||||
| PTR | beta.ns.active24.cz | ||||||
| A | 185.111.90.94🇭🇺 WEBSUPPORT-SRO-SK-AS185.111.88.0/22 | ||||||
| PTR | beta.ns.active24.cz | ||||||
| NS | gama.ns.active24.sk | ||||||
| A | 2a00:1968:0:1002:185:71:158:30🇸🇪 LOOPIA32a00:1968::/48 | ||||||
| PTR | gama.ns.active24.sk | ||||||
| A | 185.71.158.30🇸🇪 LOOPIA3185.71.158.0/24 | ||||||
| PTR | gama.ns.active24.sk | ||||||
| MX | smtp.clever.cz ⭐ | ||||||
| A | 77.104.227.24🇨🇿 COPROSYS77.104.192.0/18 CoProSys a.s. | ||||||
| PTR | smtp.clever.cz | ||||||
| MX | ns.kolin.cz(20) | ||||||
| A | 77.104.227.17🇨🇿 COPROSYS77.104.192.0/18 CoProSys a.s. | ||||||
| TXT | v=spf1 a mx -all | ||||||
| TXT | google-site-verification=OCkP3c-fKcA31Qz4yV2lti0bjk-YFJof7GVBn7M2GXw | ||||||
| SOA | alfa.ns.active24.czhostmaster@active24.cz 2025-06-12 #3 | ||||||
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=1774678638 | ||||||
Same first word
clever-system.de |
clever-system.cz |
Similar names
DNS History
10 records (6 active, 4 former)
●NSalfa.ns.active24.cz2026-02-17 → 2026-03-28 · 3 obs
● 2026-02-17 21:49:32
● 2026-03-28 06:32:02
●NSbeta.ns.active24.cz2026-02-17 → 2026-03-28 · 3 obs
● 2026-02-17 21:49:32
● 2026-03-28 06:32:02
○NScow2.dix.cz2015-07-03 → 2018-07-24 · 4 obs
● 2018-07-24 05:36:24
○ 2026-02-17 21:49:32
○ 2026-03-28 06:32:02
●NSgama.ns.active24.sk2026-02-17 → 2026-03-28 · 3 obs
● 2026-02-17 21:49:32
● 2026-03-28 06:32:02
○NSns.clever.cz2015-07-03 → 2018-07-24 · 4 obs
● 2018-07-24 05:36:24
○ 2026-02-17 21:49:32
○ 2026-03-28 06:32:02
○NSoko.clever.cz2015-07-03 → 2018-07-24 · 4 obs
● 2018-07-24 05:36:24
○ 2026-02-17 21:49:32
○ 2026-03-28 06:32:02
●A31.15.10.1842026-02-17 → 2026-03-28 · 3 obs
● 2026-02-17 21:49:32
● 2026-03-28 06:32:02
○A77.104.227.22015-07-03 → 2018-07-24 · 4 obs
● 2018-07-24 05:36:24
○ 2026-02-17 21:49:32
○ 2026-03-28 06:32:02
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| clever-system.cz | alfa.ns.active24.cz, beta.ns.active24.cz, gama.ns.active24.sk | 4 records |
✅ Authoritative Response
Server:185.71.158.30
NS records: alfa.ns.active24.cz, beta.ns.active24.cz, gama.ns.active24.sk
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for clever-system.cz (unsigned zone)
⏱️ Timing
Total: 1078ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 31.15.10.184 |
| NS | 3 | alfa.ns.active24.cz, beta.ns.active24.cz... |
| MX | 2 | smtp.clever.cz (pri: 10), ns.kolin.cz (pri: 20) |
| TXT | 2 | v=spf1 a mx -all, google-site-verification=OCkP3c-fKcA31Qz |
| SOA | 1 | alfa.ns.active24.cz hostmaster.active24. |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (alfa.ns.active24.cz, alfa.ns.active24.cz, beta.ns.active24.cz...)
Analysis
IP Addresses
clever-system.cz resolves to one IP number: 31.15.10.184.
other host names including trdlo.net, zssumvald.cz, familymarket.cz, kpj.cz and chatajarmilka.cz share IP numbers with clever-system.cz.
Name Servers
clever-system.cz is delegated to three name servers alfa.ns.active24.cz, beta.ns.active24.cz and gama.ns.active24.sk.
clever-system.cz at least partially shares name servers with other domains, for instance nemoinvest.cz, inktec.sk, gotime.ru, krobsoftware.cz and cocochoco.cz.
These name servers are commonly used alongside ns.dns4.cz and ns.dns4.net.
Host names with two IP numbers:
alfa.ns.active24.cz points to: 2a02:4a8:ac24:100::96:2 and 81.95.96.2.
beta.ns.active24.cz points to: 2a00:4b40:1000:590:185:111:90:94 and 185.111.90.94.
gama.ns.active24.sk points to: 2a00:1968:0:1002:185:71:158:30 and 185.71.158.30.
Mail Servers
Two mail servers handle clever-system.cz: smtp.clever.cz and ns.kolin.cz.
clever-system.cz shares some mail servers with other domains, at least partially, for instance iroko.info, idum.cz, televize.kolin.cz, shops.kolin.cz and fccas.cz.
these mail servers are often used alongside mail.clever.cz, smtp.kutna-hora.cz and vs843.server4u.cz.
Host names with one IP number:
smtp.clever.cz points to 77.104.227.24
ns.kolin.cz points to 77.104.227.17