knowcomment.cz - robtex.com
knowcomment.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=1764776964 | ||||||
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=1777351636 | ||||||
Same first word
knowcomment.cz |
knowcomment.org |
DNS History
8 records (5 active, 3 former)
○NSalfa.ns.active24.cz2015-05-12 → 2020-01-28 · 3 obs
● 2020-01-28 02:20:48
○ 2026-04-28 05:00:48
○NSbeta.ns.active24.cz2015-05-12 → 2020-01-28 · 3 obs
● 2020-01-28 02:20:48
○ 2026-04-28 05:00:48
○NSgama.ns.active24.sk2015-05-12 → 2020-01-28 · 3 obs
● 2020-01-28 02:20:48
○ 2026-04-28 05:00:48
●NSns1.websupport.cz2026-04-28 → 2026-04-28 · 2 obs
● 2026-04-28 05:00:48
●NSns2.websupport.cz2026-04-28 → 2026-04-28 · 2 obs
● 2026-04-28 05:00:48
●NSns3.websupport.eu2026-04-28 → 2026-04-28 · 2 obs
● 2026-04-28 05:00:48
●MXknowlimits.cust.ignum.cz2015-05-12 → 2026-04-28 · 2 obs
● 2026-04-28 05:00:48
●A217.31.52.292015-05-12 → 2026-04-28 · 2 obs
● 2026-04-28 05:00:48
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| knowcomment.cz | ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu | - |
✅ Authoritative Response
Server:45.10.97.11
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: 915ms | 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
knowcomment.cz maps to IP address 217.31.52.29.
Other host names for instance knowproblem.cz and businessgolf.cz share IP numbers with knowcomment.cz.
Name Servers
knowcomment.cz is delegated to name servers ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu.
knowcomment.cz at least partially shares name servers with other domains such as rynq.com, webmario.cz, ener.cz, intermotion.nl and heroclan.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
knowcomment.cz is handled by a single mail server, knowlimits.cust.ignum.cz.
The mail server setup for knowcomment.cz matches that of other domains, for instance knowproblem.cz.
knowcomment.cz shares some mail servers with other domains, at least partially, for instance vidim.cz.
these mail servers are commonly used alongside the mail servers mail2.ignum.cz.