gnu.cz - dns.ninja
gnu.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 89.221.213.99🇨🇿 WEDOS89.221.208.0/20 Internet, a.s. | ||||||
| PTR | hc1-wd98.wedos.net | ||||||
| NS | ns1.websupport.cz ⭐ | ||||||
| A | 2a10:bbc0::11🇨🇿 ACTIVE24-AS2a10:bbc0::/32 | ||||||
| PTR | ns1.websupport.eu | ||||||
| A | 45.10.97.11🇨🇿 ACTIVE24-AS45.10.97.0/24 | ||||||
| PTR | ns1.websupport.eu | ||||||
| NS | ns2.websupport.cz | ||||||
| A | 2a02:250:3::12🇸🇪 ACTIVE24-AS2a02:250:3::/48 | ||||||
| PTR | ns2.websupport.eu | ||||||
| A | 185.71.159.12🇸🇪 ACTIVE24-AS185.71.159.0/24 | ||||||
| PTR | ns2.websupport.eu | ||||||
| NS | ns3.websupport.eu | ||||||
| A | 2a10:bbc0::13🇨🇿 ACTIVE24-AS2a10:bbc0::/32 | ||||||
| PTR | ns3.websupport.eu | ||||||
| A | 45.10.97.13🇨🇿 ACTIVE24-AS45.10.97.0/24 | ||||||
| PTR | ns3.websupport.eu | ||||||
| MX | wes1-mx1.wedos.net ⭐ | ||||||
| A | 46.28.106.11🇨🇿 WEDOS46.28.104.0/21 Internet, a.s. | ||||||
| PTR | wes1-mx1.wedos.net | ||||||
| MX | wes1-mx2.wedos.net(10) | ||||||
| A | 46.28.106.12🇨🇿 WEDOS46.28.104.0/21 Internet, a.s. | ||||||
| PTR | wes1-mx2.wedos.net | ||||||
| MX | wes1-mx-backup.wedos.net(15) | ||||||
| A | 46.28.106.56🇨🇿 WEDOS46.28.104.0/21 Internet, a.s. | ||||||
| PTR | wes1-mx-backup.wedos.net | ||||||
| SOA | ns1.websupport.czadmin@websupport.cz serial=1744894174 | ||||||
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=1780564638 | ||||||
Previously MX for
Same first word
Similar names
DNS History
12 records (7 active, 5 former)
○NSalfa.ns.active24.cz2015-08-04 → 2016-12-29 · 4 obs
● 2016-12-29 05:34:06
○ 2026-03-27 04:46:06
○ 2026-06-04 09:48:32
○NSbeta.ns.active24.cz2015-08-04 → 2016-12-29 · 4 obs
● 2016-12-29 05:34:06
○ 2026-03-27 04:46:06
○ 2026-06-04 09:48:32
○NSgama.ns.active24.sk2015-08-04 → 2016-12-29 · 4 obs
● 2016-12-29 05:34:06
○ 2026-03-27 04:46:06
○ 2026-06-04 09:48:32
●NSns1.websupport.cz2026-03-27 → 2026-06-04 · 3 obs
● 2026-03-27 04:46:06
● 2026-06-04 09:48:32
●NSns2.websupport.cz2026-03-27 → 2026-06-04 · 3 obs
● 2026-03-27 04:46:06
● 2026-06-04 09:48:32
●NSns3.websupport.eu2026-03-27 → 2026-06-04 · 3 obs
● 2026-03-27 04:46:06
● 2026-06-04 09:48:32
○MXgnu.cz2015-08-04 → 2016-12-29 · 4 obs
● 2016-12-29 05:34:06
○ 2026-03-27 04:46:06
○ 2026-06-04 09:48:32
●MXwes1-mx-backup.wedos.net2026-03-27 → 2026-06-04 · 3 obs
● 2026-03-27 04:46:06
● 2026-06-04 09:48:32
●MXwes1-mx1.wedos.net2026-03-27 → 2026-06-04 · 3 obs
● 2026-03-27 04:46:06
● 2026-06-04 09:48:32
●MXwes1-mx2.wedos.net2026-03-27 → 2026-06-04 · 3 obs
● 2026-03-27 04:46:06
● 2026-06-04 09:48:32
○A89.187.143.992015-08-04 → 2016-12-29 · 4 obs
● 2016-12-29 05:34:06
○ 2026-03-27 04:46:06
○ 2026-06-04 09:48:32
●A89.221.213.992026-03-27 → 2026-06-04 · 3 obs
● 2026-03-27 04:46:06
● 2026-06-04 09:48:32
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz | - |
| gnu.cz | ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu | - |
✅ Authoritative Response
Server:45.10.97.13
NS records: ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1302ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 89.221.213.99 |
| NS | 3 | ns1.websupport.cz, ns2.websupport.cz... |
| MX | 3 | wes1-mx1.wedos.net (pri: 5), wes1-mx2.wedos.net (pri: 10)... |
| SOA | 1 | ns1.websupport.cz admin.websupport.cz |
Analysis
IP Addresses
gnu.cz directs to one IP number, which is 89.221.213.99.
Among the host names that share IP numbers with gnu.cz are cug.cz, www.loj.cz, drl.cz and two others.
Name Servers
gnu.cz carries NS records delegating to ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu.
gnu.cz shares at least some of its name servers with other domains, including ihriska-piccolino.sk, heatnews.cz, ingema.net and two others.
These name servers are frequently paired with the name servers ns1.websupport.sk, ns2.websupport.sk and ns3.websupport.sk.
ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu are three hostnames that each resolve to a pair of IP addresses: ns1.websupport.cz to 45.10.97.11 and 2a10:bbc0::11, ns2.websupport.cz to 185.71.159.12 and 2a02:250:3::12, and ns3.websupport.eu to 45.10.97.13 and 2a10:bbc0::13.
Mail Servers
gnu.cz is handled by three mail servers: wes1-mx-backup.wedos.net, wes1-mx1.wedos.net and wes1-mx2.wedos.net.
gnu.cz shares at least some of its mail servers with other domains — for example audidily.cz, smn.cz, ak-janota.cz and two more.
wes1-mx-backup.wedos.net points to 46.28.106.56; wes1-mx1.wedos.net points to 46.28.106.11; wes1-mx2.wedos.net points to 46.28.106.12 — each hostname maps to exactly one IP address.