learner.cz - dns.ninja
learner.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=1786263440 | ||||||
Same first word
Similar names
DNS History
9 records (7 active, 2 former)
●NSns1.thinline.cz2015-08-04 → 2026-08-09 · 2 obs
● 2026-08-09 08:41:24
●NSns2.thinline.cz2015-08-04 → 2026-08-09 · 2 obs
● 2026-08-09 08:41:24
●NSns3.cesky-hosting.eu2015-08-04 → 2026-08-09 · 2 obs
● 2026-08-09 08:41:24
●MXmx1b20.thinline.cz2015-08-04 → 2026-08-09 · 2 obs
● 2026-08-09 08:41:24
●MXmx1d10.thinline.cz2015-08-04 → 2026-08-09 · 2 obs
● 2026-08-09 08:41:24
●A2001:67c:e94:0:1:5bef:c83f:12026-03-01 → 2026-08-09 · 3 obs
● 2026-03-01 07:32:02
● 2026-08-09 08:41:24
○A2a00:1ed0:2:0:1:5bef:c8b1:12015-08-04 → 2016-12-28 · 4 obs
● 2016-12-28 08:45:54
○ 2026-03-01 07:32:02
○ 2026-08-09 08:41:24
○A91.239.200.1772015-08-04 → 2016-12-28 · 4 obs
● 2016-12-28 08:45:54
○ 2026-03-01 07:32:02
○ 2026-08-09 08:41:24
●A91.239.200.632026-03-01 → 2026-08-09 · 3 obs
● 2026-03-01 07:32:02
● 2026-08-09 08:41:24
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| learner.cz | ns1.thinline.cz, ns2.thinline.cz, ns3.cesky-hosting.eu | 4 records |
✅ Authoritative Response
Server:91.239.200.243
NS records: ns1.thinline.cz, ns2.thinline.cz, ns3.cesky-hosting.eu
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1354ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 91.239.200.63 |
| AAAA | 1 | 2001:67c:e94:0:1:5bef:c83f:1 |
| NS | 3 | ns2.thinline.cz, ns1.thinline.cz... |
| MX | 2 | mx1b20.thinline.cz (pri: 20), mx1d10.thinline.cz (pri: 10) |
| SOA | 1 | ns1.thinline.cz hostmaster.learner.cz |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns1.thinline.cz, ns2.thinline.cz, ns1.thinline.cz...)
Analysis
IP Addresses
learner.cz resolves to the IP addresses 91.239.200.63 and 2001:67c:e94:0:1:5bef:c83f:1
tomaskudela.cz, dignitas.cz, e-chujoviny.cz plus two other host names have IP numbers in common with learner.cz.
Name Servers
The authoritative name servers for learner.cz are ns1.thinline.cz, ns2.thinline.cz and ns3.cesky-hosting.eu — three in total.
learner.cz partially shares its NS delegation with several other domains, including 200.239.91.in-addr.arpa, rebalance.cz, itsmylife.cz and two others.
ns1.thinline.cz, ns2.thinline.cz and ns3.cesky-hosting.eu all resolve to exactly two IP numbers apiece: ns1.thinline.cz → 91.239.200.243 and 2001:67c:e94:0:1:5bef:c8f3:1; ns2.thinline.cz → 82.100.6.2 and 2001:4de8:fa22:0:1:5264:602:1; ns3.cesky-hosting.eu → 91.239.202.18 and 2001:67c:e94:1:1:5bef:ca12:1.
Mail Servers
learner.cz uses two mail servers, mx1b20.thinline.cz and mx1d10.thinline.cz.
The mail server setup of learner.cz matches that of other domains such as oc-sestka.cz, camp-k.cz, danielsuchy.cz and two others.
At least some of learner.cz's mail servers are shared with other domains, among them alltv.cz, pragmatica.cz and omcentrum.cz.
The two host names mx1b20.thinline.cz and mx1d10.thinline.cz each have a pair of IP addresses: mx1b20.thinline.cz has 82.100.6.3 and 2001:4de8:fa22:0:1:5264:603:1, and mx1d10.thinline.cz has 91.239.200.14 and 2001:67c:e94:0:1:5bef:c80e:1.