know.cz - robtex.com
know.cz
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=1774628237 | ||||||
Same first word
Similar names
DNS History
8 records (5 active, 3 former)
○NSalfa.ns.active24.cz2015-07-10 → 2017-03-23 · 4 obs
● 2017-03-23 21:42:58
○ 2026-03-26 16:00:48
○ 2026-03-27 16:40:10
○NSbeta.ns.active24.cz2015-07-10 → 2017-03-23 · 4 obs
● 2017-03-23 21:42:58
○ 2026-03-26 16:00:48
○ 2026-03-27 16:40:10
○NSgama.ns.active24.sk2015-07-10 → 2017-03-23 · 4 obs
● 2017-03-23 21:42:58
○ 2026-03-26 16:00:48
○ 2026-03-27 16:40:10
●NSns1.websupport.cz2026-03-26 → 2026-03-27 · 3 obs
● 2026-03-26 16:00:48
● 2026-03-27 16:40:10
●NSns2.websupport.cz2026-03-26 → 2026-03-27 · 3 obs
● 2026-03-26 16:00:48
● 2026-03-27 16:40:10
●NSns3.websupport.eu2026-03-26 → 2026-03-27 · 3 obs
● 2026-03-26 16:00:48
● 2026-03-27 16:40:10
●MXknow-cz.mail.protection.outlook.com2015-07-10 → 2026-03-27 · 2 obs
● 2026-03-27 16:40:10
●A93.185.102.672015-07-10 → 2026-03-27 · 2 obs
● 2026-03-27 16:40:10
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| know.cz | ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu | - |
✅ Authoritative Response
Server:185.71.159.12
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: 1235ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 93.185.102.67 |
| NS | 3 | ns1.websupport.cz, ns2.websupport.cz... |
| MX | 1 | know-cz.mail.protection.outlook.com (pri |
| TXT | 2 | apple-domain-verification=5MDhifvjL3dnka, v=spf1 include:spf.protection.outlook.co |
| SOA | 1 | ns1.websupport.cz admin.websupport.cz |
Analysis
IP Addresses
know.cz resolves to one IP number: 93.185.102.67.
other host names including 900washington.com, funnyfashion.cz, knowlimits.vshosting.cz, blahamarek.cz and nros.cz share IP numbers with know.cz.
Name Servers
know.cz is delegated to three name servers ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu.
know.cz at least partially shares name servers with other domains, for instance aeroklub-ostrava.cz, duso.sk, ipulse.cz, helios-erp.cz and talea.cz.
Host names with two IP numbers:
ns1.websupport.cz points to: 2a10:bbc0::11 and 45.10.97.11.
ns2.websupport.cz points to: 2a02:250:3::12 and 185.71.159.12.
ns3.websupport.eu points to: 2a10:bbc0::13 and 45.10.97.13.
Mail Servers
know.cz is handled by a single mail server, know-cz.mail.protection.outlook.com.
Host know-cz.mail.protection.outlook.com points to eight IP numbers: 2a01:111:f403:ca09::1, 2a01:111:f403:ca09::7, 2a01:111:f403:ca09::c, 2a01:111:f403:ca09::f, 52.101.68.0, 52.101.73.2, 52.101.73.6 and 52.101.73.11.