knowproblem.cz - robtex.com
knowproblem.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 217.31.52.29🇨🇿 IGNUM-AS217.31.48.0/20 Network of Ignum s.r.o. Czech Republic http://www.ignum.cz/ | ||||||
| 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 | knowlimits.cust.ignum.cz ⭐ | ||||||
| SOA | ns1.websupport.czadmin@websupport.cz serial=1764776968 | ||||||
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=1777423633 | ||||||
Same first word
knowproblem.cz |
DNS History
8 records (5 active, 3 former)
○NSalfa.ns.active24.cz2015-06-23 → 2020-03-14 · 4 obs
● 2020-03-14 17:01:34
○ 2026-03-25 18:44:36
○ 2026-04-29 01:03:34
○NSbeta.ns.active24.cz2015-06-23 → 2020-03-14 · 4 obs
● 2020-03-14 17:01:34
○ 2026-03-25 18:44:36
○ 2026-04-29 01:03:34
○NSgama.ns.active24.sk2015-06-23 → 2020-03-14 · 4 obs
● 2020-03-14 17:01:34
○ 2026-03-25 18:44:36
○ 2026-04-29 01:03:34
●NSns1.websupport.cz2026-03-25 → 2026-04-29 · 3 obs
● 2026-03-25 18:44:36
● 2026-04-29 01:03:34
●NSns2.websupport.cz2026-03-25 → 2026-04-29 · 3 obs
● 2026-03-25 18:44:36
● 2026-04-29 01:03:34
●NSns3.websupport.eu2026-03-25 → 2026-04-29 · 3 obs
● 2026-03-25 18:44:36
● 2026-04-29 01:03:34
●MXknowlimits.cust.ignum.cz2015-06-23 → 2026-04-29 · 2 obs
● 2026-04-29 01:03:34
●A217.31.52.292015-06-23 → 2026-04-29 · 2 obs
● 2026-04-29 01:03:34
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| knowproblem.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: 919ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 217.31.52.29 |
| NS | 3 | ns1.websupport.cz, ns2.websupport.cz... |
| MX | 1 | knowlimits.cust.ignum.cz (pri: 10) |
| SOA | 1 | ns1.websupport.cz admin.websupport.cz |
Analysis
IP Addresses
knowproblem.cz resolves to one IP number: 217.31.52.29.
Other host names such as knowcomment.cz and businessgolf.cz share IP numbers with knowproblem.cz.
Name Servers
knowproblem.cz is delegated to three name servers ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu.
knowproblem.cz at least partially shares name servers with other domains, for instance leadershipforlife.cz, lkbaits.com.pl, qliniq.de, hanzelka.cz and annovum.nl.
These name servers are commonly used with ns1.websupport.sk, ns2.websupport.sk and ns3.websupport.sk.
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
knowproblem.cz is handled by a single mail server, knowlimits.cust.ignum.cz.
knowproblem.cz shares the same mail server setup as other domains, for instance knowcomment.cz.
knowproblem.cz shares mail servers with other domains to some extent, for instance vidim.cz.
these mail servers are commonly used with the mail servers mail2.ignum.cz.