computerscience.cz - dns.ninja
computerscience.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 147.231.6.218🇨🇿 CESNET147.231.0.0/16 | ||||||
| NS | fw.cs.cas.cz ⭐ | ||||||
| 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 | ||||||
| NS | visla.utia.cas.cz ⚠️ Not in parent delegation | ||||||
| A | 2001:718:401:1::1🇨🇿 CESNET2001:718::/32 6-TCZ | ||||||
| PTR | visla.utia.cas.cz | ||||||
| A | 147.231.12.1🇨🇿 CESNET147.231.0.0/16 | ||||||
| MX | mgw.cs.cas.cz ⭐ | ||||||
| A | 147.231.6.235🇨🇿 CESNET147.231.0.0/16 | ||||||
| PTR | mgw.cs.cas.cz | ||||||
| TXT | google-site-verification=huH-BD2XAaFOHYvZipBnaCtKbp4MduqZdA8zdrzS9LE | ||||||
| TXT | v=spf1 ip4:147.231.6.235 a:mgw.cs.cas.cz a:mailer.cs.cas.cz a:c100.cs.cas.cz ... | ||||||
| SOA | fw.cs.cas.czhostmaster@cs.cas.cz 2026-05-31 #0 | ||||||
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=1782629236 | ||||||
Same first word
DNS History
8 records (5 active, 3 former)
●NSns2.ignum.cz2026-03-14 → 2026-06-28 · 3 obs
● 2026-03-14 23:21:00
● 2026-06-28 07:21:44
●NSvisla.utia.cas.cz2015-08-18 → 2026-06-28 · 2 obs
● 2026-06-28 07:21:44
○MXbamail.cs.cas.cz2015-08-18 → 2019-04-02 · 4 obs
● 2019-04-02 03:02:04
○ 2026-03-14 23:21:00
○ 2026-06-28 07:21:44
○MXc100.cs.cas.cz2026-03-14 → 2026-04-24 · 5 obs
● 2026-03-14 23:21:00
● 2026-04-24 19:24:38
○ 2026-05-25 05:03:34
○ 2026-06-28 07:21:44
●MXmgw.cs.cas.cz2026-05-25 → 2026-06-28 · 3 obs
● 2026-05-25 05:03:34
● 2026-06-28 07:21:44
●A147.231.6.2182026-03-14 → 2026-06-28 · 3 obs
● 2026-03-14 23:21:00
● 2026-06-28 07:21:44
○A147.231.6.2462015-08-18 → 2019-04-02 · 4 obs
● 2019-04-02 03:02:04
○ 2026-03-14 23:21:00
○ 2026-06-28 07:21:44
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | c.ns.nic.cz, d.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz | - |
| computerscience.cz | fw.cs.cas.cz, ns2.ignum.cz | 2 records |
✅ Authoritative Response
Server:147.231.6.1
NS records: fw.cs.cas.cz, ns2.ignum.cz
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for computerscience.cz (unsigned zone)
⏱️ Timing
Total: 2152ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 147.231.6.218 |
| NS | 3 | ns2.ignum.cz, fw.cs.cas.cz... |
| MX | 1 | mgw.cs.cas.cz (pri: 5) |
| TXT | 2 | google-site-verification=huH-BD2XAaFOHYv, v=spf1 ip4:147.231.6.235 a:mgw.cs.cas.cz |
| SOA | 1 | fw.cs.cas.cz hostmaster.cs.cas.cz |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns2.ignum.cz, ns2.ignum.cz)
Analysis
IP Addresses
computerscience.cz resolves to just one IP address, 147.231.6.218.
cs.cas.cz, ustavinformatiky.cz and www.cs.cas.cz are examples of other host names that share IP numbers with computerscience.cz.
Name Servers
computerscience.cz is delegated to three name servers: ns2.ignum.cz, fw.cs.cas.cz and visla.utia.cas.cz.
computerscience.cz has at least partial name server overlap with other domains, such as hkostas.cz, kentz.cz, tiskarnakufr.cz and two others.
ns1.ignum.com, academy.cas.cz and nsa.ces.net — plus 5 other name servers — are commonly paired with these name servers.
ns2.ignum.cz and visla.utia.cas.cz each resolve to two IP addresses: ns2.ignum.cz points to 217.31.48.201 and 2001:1ab0:7e1e:2::5, while visla.utia.cas.cz points to 147.231.12.1 and 2001:718:401:1::1.
Mail Servers
The sole mail server for computerscience.cz is mgw.cs.cas.cz.
Other domains such as informatics.cz, cs.cas.cz and ustavinformatiky.cz share the same mail server setup as computerscience.cz.
mgw.cs.cas.cz resolves to a single IP number: 147.231.6.235.