chkk.cz - robtex.com
chkk.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 2a00:4b40:aaaa:2005::5🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32 | ||||||
| A | 37.9.175.163🇸🇰 WEBSUPPORT-SRO-SK-AS37.9.175.0/24 | ||||||
| NS | ns1.websupport.cz ⭐ | ||||||
| A | 2a10:bbc0::11🇨🇿 ACTIVE24-AS2a10:bbc0::/32 | ||||||
| PTR | ns1.websupport.eu | ||||||
| A | 45.10.97.11🇨🇿 ACTIVE24-AS45.10.97.0/24 | ||||||
| PTR | ns1.websupport.eu | ||||||
| NS | ns2.websupport.cz | ||||||
| A | 2a02:250:3::12🇸🇪 ACTIVE24-AS2a02:250:3::/48 | ||||||
| PTR | ns2.websupport.eu | ||||||
| A | 185.71.159.12🇸🇪 ACTIVE24-AS185.71.159.0/24 | ||||||
| PTR | ns2.websupport.eu | ||||||
| NS | ns3.websupport.eu | ||||||
| A | 2a10:bbc0::13🇨🇿 ACTIVE24-AS2a10:bbc0::/32 | ||||||
| PTR | ns3.websupport.eu | ||||||
| A | 45.10.97.13🇨🇿 ACTIVE24-AS45.10.97.0/24 | ||||||
| PTR | ns3.websupport.eu | ||||||
| MX | mx10.active24.cz ⭐ | ||||||
| A | 2a00:4b40:aaaa:2101:45:13:137:85🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32 | ||||||
| A | 45.13.137.85🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24 | ||||||
| PTR | mx10.active24.cz | ||||||
| MX | mx20.active24.cz(100) | ||||||
| A | 2a00:4b40:aaaa:2101:45:13:137:86🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32 | ||||||
| A | 45.13.137.86🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24 | ||||||
| PTR | mx20.active24.cz | ||||||
| TXT | v=spf1 include:spf.active24.com ~all | ||||||
| SOA | ns1.websupport.czadmin@websupport.cz serial=1775136478 | ||||||
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=1778741235 | ||||||
Same first word
Similar names
DNS History
7 records (7 active, 0 former)
●NSns1.websupport.cz2026-04-27 → 2026-05-14 · 2 obs
● 2026-05-14 07:01:38
●NSns2.websupport.cz2026-04-27 → 2026-05-14 · 2 obs
● 2026-05-14 07:01:38
●NSns3.websupport.eu2026-04-27 → 2026-05-14 · 2 obs
● 2026-05-14 07:01:38
●MXmx10.active24.cz2026-04-27 → 2026-05-14 · 2 obs
● 2026-05-14 07:01:38
●MXmx20.active24.cz2026-04-27 → 2026-05-14 · 2 obs
● 2026-05-14 07:01:38
●A2a00:4b40:aaaa:2005::52026-04-27 → 2026-05-14 · 2 obs
● 2026-05-14 07:01:38
●A37.9.175.1632026-04-27 → 2026-05-14 · 2 obs
● 2026-05-14 07:01:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| chkk.cz | ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu | - |
✅ Authoritative Response
Server:45.10.97.13
NS records: ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1292ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 37.9.175.163 |
| AAAA | 1 | 2a00:4b40:aaaa:2005::5 |
| NS | 3 | ns1.websupport.cz, ns2.websupport.cz... |
| MX | 2 | mx10.active24.cz (pri: 10), mx20.active24.cz (pri: 100) |
| TXT | 1 | v=spf1 include:spf.active24.com ~all |
| SOA | 1 | ns1.websupport.cz admin.websupport.cz |
Analysis
IP Addresses
chkk.cz resolves to two IP numbers: 2a00:4b40:aaaa:2005::5 and 37.9.175.163.
Other host names, for instance mekom.cz, mailin1.skolachudenin.cz, www.biels.nl, mesto-modrice.cz and basho.cz share IP numbers with chkk.cz.
Name Servers
chkk.cz delegates to three name servers: ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu.
chkk.cz shares some name servers with other domains, for example theharmers.com, augusta.cz, coou.cz, hi-oil.cz and polcarbo.eu.
Host names with two IP numbers:
ns1.websupport.cz: 2a10:bbc0::11 and 45.10.97.11
ns2.websupport.cz: 2a02:250:3::12 and 185.71.159.12
ns3.websupport.eu: 2a10:bbc0::13 and 45.10.97.13
Mail Servers
chkk.cz is served by two mail servers: mx10.active24.cz and mx20.active24.cz.
chkk.cz shares the mail server setup with other domains, for example zus-ml.cz, pokonem.cz, eurobioimaging.cz, wrwtech.com and euromach.cz.
chkk.cz shares some mail servers with other domains, at least partially, for instance sem-seo.org, eqb.cz and hkdwholasek.cz.
Host names with two IP numbers:
mx10.active24.cz points to: 2a00:4b40:aaaa:2101:45:13:137:85 and 45.13.137.85; mx20.active24.cz points to: 2a00:4b40:aaaa:2101:45:13:137:86 and 45.13.137.86.