dev.cz - dns.ninja
dev.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=1781727436 | ||||||
Same first word
Similar names
DNS History
7 records (6 active, 1 former)
●NSalfa.ns.active24.cz2008-10-13 → 2026-06-17 · 2 obs
● 2026-06-17 20:55:34
●NSbeta.ns.active24.cz2008-10-13 → 2026-06-17 · 2 obs
● 2026-06-17 20:55:34
●NSgama.ns.active24.sk2015-08-07 → 2026-06-17 · 3 obs
● 2015-08-07 18:57:04
● 2026-06-17 20:55:34
●MXgw.mediafactory.cz2008-10-13 → 2026-06-17 · 2 obs
● 2026-06-17 20:55:34
○MXmx.smtp.cz2008-10-13 → 2017-05-25 · 4 obs
● 2017-05-25 15:26:04
○ 2020-12-04 02:07:36
○ 2026-06-17 20:55:34
●MXmx2.active24.com2020-12-04 → 2026-06-17 · 3 obs
● 2020-12-04 02:07:36
● 2026-06-17 20:55:34
●A88.208.100.2082008-10-13 → 2026-06-17 · 2 obs
● 2026-06-17 20:55:34
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| dev.cz | alfa.ns.active24.cz, gama.ns.active24.sk, beta.ns.active24.cz | 4 records |
✅ Authoritative Response
Server:81.95.96.2
NS records: alfa.ns.active24.cz, gama.ns.active24.sk, beta.ns.active24.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1354ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 88.208.100.208 |
| NS | 3 | alfa.ns.active24.cz, beta.ns.active24.cz... |
| MX | 2 | gw.mediafactory.cz (pri: 10), mx2.active24.com (pri: 20) |
| TXT | 1 | v=spf1 ip4:88.208.100.208 ip4:88.208.100 |
| SOA | 1 | alfa.ns.active24.cz hostmaster.active24. |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (beta.ns.active24.cz, alfa.ns.active24.cz, beta.ns.active24.cz...)
Analysis
IP Addresses
dev.cz has exactly one IP address — 88.208.100.208.
Name Servers
DNS for dev.cz is handled by three authoritative name servers: alfa.ns.active24.cz, beta.ns.active24.cz and gama.ns.active24.sk.
There is at least partial name server overlap between dev.cz and other domains — cmart.cz, sysware.cz, kon-takt.cz and two more among them.
These name servers frequently co-occur with the name servers ns.servery.cz and ns.dns4.cz.
Three hostnames — alfa.ns.active24.cz, beta.ns.active24.cz and gama.ns.active24.sk — each have two IP addresses: alfa.ns.active24.cz has 81.95.96.2 and 2a02:4a8:ac24:100::96:2, beta.ns.active24.cz has 185.111.90.94 and 2a00:4b40:1000:590:185:111:90:94, and gama.ns.active24.sk has 185.71.158.30 and 2a00:1968:0:1002:185:71:158:30.
Mail Servers
dev.cz uses two mail servers, mx2.active24.com and gw.mediafactory.cz.
Like media-factory.cz and mediafactory.eu, dev.cz has the same mail server arrangement as several other domains.
At least some of the mail servers used by dev.cz are shared with other domains: oblaca.cz, rivella.cz, interdoor.org and two others among them.
These mail servers tend to be used in conjunction with the mail servers mx1.active24.com.
Host names pointing to two IP addresses:
mx2.active24.com has two IP addresses: 185.111.90.93 and 2a00:4b40:1000:590:185:111:90:93.
Host names resolving to a single IP address:
gw.mediafactory.cz directs to 213.151.83.254.