cortex.cz - dns.ninja
cortex.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2a01:28:ca:112::1:1968🇨🇿 SuperNetwork2a01:28::/32 s.r.o. | ||||||
| PTR | ygn03.vas-server.cz | ||||||
| A | 88.86.124.54🇨🇿 SuperNetwork88.86.96.0/19 s.r.o. | ||||||
| NS | ns-11.cortex.cz ⭐ | ||||||
| A | 2a0e:e581:1:aaaa::53🇨🇿 CORTEX2a0e:e580::/29 | ||||||
| PTR | ns-11.cortex.cz | ||||||
| A | 185.250.102.194🇨🇿 CORTEX185.250.100.0/22 Cortex, a.s. | ||||||
| PTR | ns-11.cortex.cz | ||||||
| NS | ns-21.cortex.cz | ||||||
| A | 2a0e:e581:2:aaaa::53🇨🇿 CORTEX2a0e:e580::/29 | ||||||
| PTR | ns-21.cortex.cz | ||||||
| A | 185.250.102.10🇨🇿 CORTEX185.250.100.0/22 Cortex, a.s. | ||||||
| PTR | ns-21.cortex.cz | ||||||
| MX | pmg-01.cortex.cz ⭐ | ||||||
| A | 2a0e:e581:2:aaaa::6🇨🇿 CORTEX2a0e:e580::/29 | ||||||
| PTR | pmg-01.cortex.cz | ||||||
| A | 185.250.102.6🇨🇿 CORTEX185.250.100.0/22 Cortex, a.s. | ||||||
| PTR | pmg-01.cortex.cz | ||||||
| TXT | google-site-verification=FqAQKAFuclmBSjZ2Rj8ttBkO__eAh2vP4vvJyPfdrTw | ||||||
| TXT | google-site-verification=Z6T80kAPjyy0zj56RFAD5eC-W4aZkK7-vmRRB1InLds | ||||||
| TXT | v=spf1 mx include:_spf.cortex.cz ~all | ||||||
| SOA | ns-11.cortex.czroot@cortex.cz 2026-06-15 #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=1784510240 | ||||||
Subdomains
Same first word
Similar names
DNS History
18 records (5 active, 13 former)
●NSns-11.cortex.cz2026-02-16 → 2026-07-20 · 3 obs
● 2026-02-16 15:06:00
● 2026-07-20 02:11:28
●NSns-21.cortex.cz2026-02-16 → 2026-07-20 · 3 obs
● 2026-02-16 15:06:00
● 2026-07-20 02:11:28
○NSns.cortex.cz2009-01-12 → 2009-01-12 · 3 obs
○ 2015-06-30 00:38:58
○ 2026-07-20 02:11:28
○NSns1a.cortex.cz2015-06-30 → 2017-05-25 · 5 obs
● 2015-06-30 00:38:58
● 2017-05-25 11:11:56
○ 2026-02-16 15:06:00
○ 2026-07-20 02:11:28
○NSns1b.cortex.cz2015-06-30 → 2017-05-25 · 5 obs
● 2015-06-30 00:38:58
● 2017-05-25 11:11:56
○ 2026-02-16 15:06:00
○ 2026-07-20 02:11:28
○NSns2a.cortex.cz2015-06-30 → 2017-05-25 · 5 obs
● 2015-06-30 00:38:58
● 2017-05-25 11:11:56
○ 2026-02-16 15:06:00
○ 2026-07-20 02:11:28
○NSns2b.cortex.cz2015-06-30 → 2017-05-25 · 5 obs
● 2015-06-30 00:38:58
● 2017-05-25 11:11:56
○ 2026-02-16 15:06:00
○ 2026-07-20 02:11:28
○NSsq.sk2009-01-12 → 2009-01-12 · 3 obs
○ 2015-06-30 00:38:58
○ 2026-07-20 02:11:28
○MXinet1.cortex.cz2009-01-12 → 2009-01-12 · 3 obs
○ 2015-06-30 00:38:58
○ 2026-07-20 02:11:28
○MXinet2.cortex.cz2009-01-12 → 2009-01-12 · 3 obs
○ 2015-06-30 00:38:58
○ 2026-07-20 02:11:28
○MXns.cortex.cz2009-01-12 → 2009-01-12 · 3 obs
○ 2015-06-30 00:38:58
○ 2026-07-20 02:11:28
○MXns2.cortex.cz2015-06-30 → 2017-05-25 · 5 obs
● 2015-06-30 00:38:58
● 2017-05-25 11:11:56
○ 2026-02-16 15:06:00
○ 2026-07-20 02:11:28
●MXpmg-01.cortex.cz2026-02-16 → 2026-07-20 · 3 obs
● 2026-02-16 15:06:00
● 2026-07-20 02:11:28
○MXsq.sk2009-01-12 → 2009-01-12 · 3 obs
○ 2015-06-30 00:38:58
○ 2026-07-20 02:11:28
○A193.85.241.1682015-06-30 → 2017-05-25 · 5 obs
● 2015-06-30 00:38:58
● 2017-05-25 11:11:56
○ 2026-02-16 15:06:00
○ 2026-07-20 02:11:28
●A2a01:28:ca:112::1:19682026-02-16 → 2026-07-20 · 3 obs
● 2026-02-16 15:06:00
● 2026-07-20 02:11:28
○A62.168.27.1072009-01-12 → 2009-01-12 · 3 obs
○ 2015-06-30 00:38:58
○ 2026-07-20 02:11:28
●A88.86.124.542026-02-16 → 2026-07-20 · 3 obs
● 2026-02-16 15:06:00
● 2026-07-20 02:11:28
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | d.ns.nic.cz, b.ns.nic.cz, a.ns.nic.cz, c.ns.nic.cz | - |
| cortex.cz | ns-11.cortex.cz, ns-21.cortex.cz | 4 records |
✅ Authoritative Response
Server:185.250.102.10
NS records: ns-11.cortex.cz, ns-21.cortex.cz
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cortex.cz (unsigned zone)
⏱️ Timing
Total: 557ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 88.86.124.54 |
| AAAA | 1 | 2a01:28:ca:112::1:1968 |
| NS | 2 | ns-21.cortex.cz, ns-11.cortex.cz |
| MX | 1 | pmg-01.cortex.cz (pri: 10) |
| TXT | 3 | google-site-verification=Z6T80kAPjyy0zj5, google-site-verification=FqAQKAFuclmBSjZ... |
| SOA | 1 | ns-11.cortex.cz root.cortex.cz |
📌 Glue Records Collected
Total: 4
In-bailiwick: 4 (ns-11.cortex.cz, ns-11.cortex.cz, ns-21.cortex.cz...)
Analysis
Hierarchy
The host names inet3.cortex.cz, mail.cortex.cz, pmg-01.cortex.cz, ns-11.cortex.cz and ns-21.cortex.cz — among a few others — fall under the parent domain cortex.cz.
IP Addresses
cortex.cz has two IP addresses: 88.86.124.54 and 2a01:28:ca:112::1:1968
crmcarecloud.com, ygn03.vas-server.cz, carecloud.info and two other host names share IP numbers with cortex.cz.
Name Servers
cortex.cz is delegated to two name servers: ns-11.cortex.cz and ns-21.cortex.cz.
cortex.cz uses the same name servers as several other domains — among them carecloud.cz, crmcarecloud.com, 102.250.185.in-addr.arpa and two more.
ns-11.cortex.cz and ns-21.cortex.cz each resolve to two IP addresses: ns-11.cortex.cz points to 185.250.102.194 and 2a0e:e581:1:aaaa::53, while ns-21.cortex.cz points to 185.250.102.10 and 2a0e:e581:2:aaaa::53.
Mail Servers
Mail for cortex.cz is handled by a single mail server, pmg-01.cortex.cz.
cortex.cz, carecloud.cz and crmcarecloud.com all share the same mail server setup.
pmg-01.cortex.cz directs to two IP numbers, 185.250.102.6 and 2a0e:e581:2:aaaa::6.