knowledge.cz - dns.ninja
knowledge.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 65.181.113.41🇬🇧 WHG-FRA65.181.113.0/24 | ||||||
| PTR | s12079.fra1.stableserver.net | ||||||
| NS | ns1.regzone.cz ⭐ | ||||||
| A | 2a00:19a0:3:71:0:d9c6:710a:1🇨🇿 ZONER-AS2a00:19a0::/32 ZONER-IPV6-NET | ||||||
| PTR | ns1.regzone.cz | ||||||
| A | 217.198.113.10🇨🇿 ZONER-AS217.198.112.0/20 ZONER-NET | ||||||
| PTR | ns1.regzone.cz | ||||||
| NS | ns1.regzone.de | ||||||
| A | 2600:3c02::f03c:91ff:fedb:a6e7🇺🇸 AKAMAI-LINODE-AP2600:3c02::/32 Akamai Technologies | ||||||
| PTR | ns1.regzone.de | ||||||
| A | 23.92.29.43🇺🇸 AKAMAI-LINODE-AP23.92.28.0/22 Akamai Technologies | ||||||
| PTR | ns1.regzone.de | ||||||
| NS | ns1.regzone.info | ||||||
| A | 2001:1528:147::10🇨🇿 CASABLANCA-AS2001:1528::/32 Casablanca INT v6 network | ||||||
| PTR | ns1.regzone.info | ||||||
| A | 81.0.233.10🇨🇿 CASABLANCA-AS81.0.232.0/21 Casablanca INT | ||||||
| PTR | ns1.regzone.info | ||||||
| SOA | ns1.regzone.czadministrator@czechia.cz 2026-07-18 #2 | ||||||
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=1784665044 | ||||||
Same first word
Similar names
DNS History
9 records (4 active, 5 former)
●NSns1.regzone.cz2015-05-07 → 2026-07-21 · 2 obs
● 2026-07-21 21:12:30
●NSns1.regzone.de2015-05-07 → 2026-07-21 · 2 obs
● 2026-07-21 21:12:30
●NSns1.regzone.info2015-05-07 → 2026-07-21 · 2 obs
● 2026-07-21 21:12:30
○A143.95.245.1552015-12-30 → 2016-03-29 · 5 obs
● 2015-12-30 06:36:18
● 2016-03-29 19:24:50
○ 2016-09-13 02:43:08
○ 2026-07-21 21:12:30
○A198.58.94.1522015-05-07 → 2015-05-07 · 3 obs
○ 2015-10-22 15:48:26
○ 2026-07-21 21:12:30
○A217.198.116.1882015-10-22 → 2018-06-25 · 7 obs
● 2015-10-22 15:48:26
○ 2015-12-30 06:36:18
○ 2016-09-13 02:43:08
● 2018-06-25 15:23:06
○ 2026-02-19 14:28:04
○ 2026-07-21 21:12:30
○A2a00:19a0:3:74:0:d9c6:74bc:12018-06-25 → 2018-06-25 · 4 obs
● 2018-06-25 15:23:06
○ 2026-02-19 14:28:04
○ 2026-07-21 21:12:30
○A31.15.10.492016-09-13 → 2016-09-13 · 4 obs
● 2016-09-13 02:43:08
○ 2018-06-25 15:23:06
○ 2026-07-21 21:12:30
●A65.181.113.412026-02-19 → 2026-07-21 · 3 obs
● 2026-02-19 14:28:04
● 2026-07-21 21:12:30
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | b.ns.nic.cz, a.ns.nic.cz, d.ns.nic.cz, c.ns.nic.cz | - |
| knowledge.cz | ns1.regzone.cz, ns1.regzone.de, ns1.regzone.info | 2 records |
✅ Authoritative Response
Server:81.0.233.10
NS records: ns1.regzone.cz, ns1.regzone.de, ns1.regzone.info
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1035ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 65.181.113.41 |
| NS | 3 | ns1.regzone.cz, ns1.regzone.de... |
| SOA | 1 | ns1.regzone.cz administrator.czechia.cz |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.regzone.cz, ns1.regzone.cz)
Analysis
IP Addresses
knowledge.cz has exactly one IP address — 65.181.113.41.
_dc-mx.f6f61454b1ed.vaizidou.gr, webdisk.epiccargo.co.tz, kalesija.ba plus two other host names have IP numbers in common with knowledge.cz.
Name Servers
The authoritative name servers for knowledge.cz are ns1.regzone.cz, ns1.regzone.de and ns1.regzone.info — three in total.
knowledge.cz partially shares its NS delegation with several other domains, including hdps.cz, alpine-pro.cz, babybutor.hu and two others.
ns1.regzone.cz, ns1.regzone.de and ns1.regzone.info all resolve to exactly two IP numbers apiece: ns1.regzone.cz → 217.198.113.10 and 2a00:19a0:3:71:0:d9c6:710a:1; ns1.regzone.de → 23.92.29.43 and 2600:3c02::f03c:91ff:fedb:a6e7; ns1.regzone.info → 81.0.233.10 and 2001:1528:147::10.