study.cz - dns.ninja
study.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 198.202.211.1🇺🇸 CLOUDFLARESPECTRUM198.202.211.0/24 Webflow | ||||||
| NS | ns1.ignum.com ⭐ | ||||||
| A | 2a00:1e40:a:53::5🇸🇰 IGNUM-AS2a00:1e40:a::/48 | ||||||
| PTR | ns1-bra.core.webglobe.com | ||||||
| A | 185.65.223.35🇸🇰 IGNUM-AS185.65.223.0/24 | ||||||
| PTR | ns1-bra.core.webglobe.com | ||||||
| NS | ns2.ignum.cz | ||||||
| A | 2001:1ab0:7e1e:2::5🇨🇿 IGNUM-AS2001:1ab0::/32 Network of Ignum s.r.o. Czech Republic http://www.ignum.cz/ | ||||||
| PTR | ns2-prg.core.webglobe.com | ||||||
| A | 217.31.48.201🇨🇿 IGNUM-AS217.31.48.0/20 Network of Ignum s.r.o. Czech Republic http://www.ignum.cz/ | ||||||
| PTR | ns2-prg.core.webglobe.com | ||||||
| MX | study-cz.i-v1.mx.microsoft ⭐ | ||||||
| TXT | MS=ms57810460 | ||||||
| TXT | v=spf1 include:asiana.cz -all | ||||||
| SOA | ns1.ignum.comhostmaster@ignum.cz 2026-07-21 #1 | ||||||
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=1784641641 | ||||||
Same first word
Similar names
DNS History
9 records (4 active, 5 former)
○MXsmtp1.asiana.cz2015-06-22 → 2017-04-04 · 4 obs
● 2017-04-04 15:28:46
○ 2026-03-16 15:31:08
○ 2026-07-21 14:21:40
○MXsmtp2.asiana.cz2015-06-22 → 2017-04-04 · 4 obs
● 2017-04-04 15:28:46
○ 2026-03-16 15:31:08
○ 2026-07-21 14:21:40
●MXstudy-cz.i-v1.mx.microsoft2026-07-21 → 2026-07-21 · 2 obs
● 2026-07-21 14:21:40
○MXstudy-cz.mail.protection.outlook.com2026-03-16 → 2026-03-16 · 3 obs
● 2026-03-16 15:31:08
○ 2026-07-21 14:21:40
●A198.202.211.12026-03-16 → 2026-07-21 · 3 obs
● 2026-03-16 15:31:08
● 2026-07-21 14:21:40
○A217.16.184.1732016-09-18 → 2017-04-04 · 5 obs
● 2016-09-18 18:38:26
● 2017-04-04 15:28:46
○ 2026-03-16 15:31:08
○ 2026-07-21 14:21:40
○A88.208.118.2002015-06-22 → 2016-04-18 · 4 obs
● 2016-04-18 17:39:46
○ 2016-09-18 18:38:26
○ 2026-07-21 14:21:40
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| study.cz | ns1.ignum.com, ns2.ignum.cz | 2 records |
✅ Authoritative Response
Server:217.31.48.201
NS records: ns1.ignum.com, ns2.ignum.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 3674ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 198.202.211.1 |
| NS | 2 | ns1.ignum.com, ns2.ignum.cz |
| MX | 1 | study-cz.i-v1.mx.microsoft (pri: 0) |
| TXT | 2 | MS=ms57810460, v=spf1 include:asiana.cz -all |
| SOA | 1 | ns1.ignum.com hostmaster.ignum.cz |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns2.ignum.cz, ns2.ignum.cz)
Analysis
IP Addresses
study.cz has exactly one IP address — 198.202.211.1.
xelera.io, appsci.io, blizzardlighting.com plus two other host names have IP numbers in common with study.cz.
Name Servers
Two name servers handle the delegation for study.cz: ns1.ignum.com and ns2.ignum.cz.
The name server configuration of study.cz is shared with other domains, for instance czechbritishschool.cz, automig.sk, hyperbarickamedicina.eu and two others.
study.cz partially shares its NS delegation with several other domains, including pauza.cz, internetsezemice.cz, flipflop.cz and two others.
The name servers ns1.ignum.eu, ns2.ignum.eu, ns3.ignum.eu and ns1.webcloud.cz are often found in use alongside these name servers.
ns1.ignum.com and ns2.ignum.cz both carry two IP addresses. The A records for ns1.ignum.com are 185.65.223.35 and 2a00:1e40:a:53::5; the A records for ns2.ignum.cz are 217.31.48.201 and 2001:1ab0:7e1e:2::5.
Mail Servers
study.cz uses one mail server — study-cz.i-v1.mx.microsoft.