czerner.cz - robtex.com
czerner.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=1774918038 | ||||||
Same first word
DNS History
8 records (8 active, 0 former)
●NSashley.ns.cloudflare.com2026-03-19 → 2026-03-31 · 2 obs
● 2026-03-31 00:52:36
●NSowen.ns.cloudflare.com2026-03-19 → 2026-03-31 · 2 obs
● 2026-03-31 00:52:36
●MXmail.protonmail.ch2026-03-19 → 2026-03-31 · 2 obs
● 2026-03-31 00:52:36
●MXmailsec.protonmail.ch2026-03-19 → 2026-03-31 · 2 obs
● 2026-03-31 00:52:36
●A104.21.42.872026-03-19 → 2026-03-31 · 2 obs
● 2026-03-31 00:52:36
●A172.67.203.1722026-03-19 → 2026-03-31 · 2 obs
● 2026-03-31 00:52:36
●A2606:4700:3034::ac43:cbac2026-03-19 → 2026-03-31 · 2 obs
● 2026-03-31 00:52:36
●A2606:4700:3037::6815:2a572026-03-19 → 2026-03-31 · 2 obs
● 2026-03-31 00:52:36
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| czerner.cz | owen.ns.cloudflare.com, ashley.ns.cloudflare.com | - |
✅ Authoritative Response
Server:172.64.33.219
NS records: owen.ns.cloudflare.com, ashley.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for czerner.cz (unsigned zone)
⏱️ Timing
Total: 868ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.42.87, 172.67.203.172 |
| AAAA | 2 | 2606:4700:3034::ac43:cbac, 2606:4700:3037::6815:2a57 |
| NS | 2 | ashley.ns.cloudflare.com, owen.ns.cloudflare.com |
| MX | 2 | mail.protonmail.ch (pri: 10), mailsec.protonmail.ch (pri: 20) |
| TXT | 3 | google-site-verification=T1R5CbikPlzmP9T, protonmail-verification=d1948ef0a20bf994... |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | ashley.ns.cloudflare.com dns.cloudflare. |
Analysis
IP Addresses
czerner.cz refers to four IP numbers: 2606:4700:3034::ac43:cbac, 2606:4700:3037::6815:2a57, 104.21.42.87 and 172.67.203.172.
Other host names, for instance gampersrestaurant.com, mewx.org, tianjistar.com, glamiraa.my and neldipano.com share IP numbers with czerner.cz.
Name Servers
czerner.cz's delegation uses two name servers: ashley.ns.cloudflare.com and owen.ns.cloudflare.com.
czerner.cz uses the same name server setup as other domains, such as sugotogo.com, cejed.top, pharmacius.com, georgeyangmd.com and technologyconversations.com.
czerner.cz at least partially shares name servers with other domains, including saffrontech.net, wmow.online, cherchow.com, ligaultras.com and 9288bet.com.
These name servers are commonly used together with the name servers henrik.ns.cloudflare.com, neil.ns.cloudflare.com, mckinley.ns.cloudflare.com and jarred.ns.cloudflare.com.
Host names with six IP numbers:
ashley.ns.cloudflare.com points to 2606:4700:50::adf5:3a47, 2803:f800:50::6ca2:c047, 2a06:98c1:50::ac40:2047, 108.162.192.71, 172.64.32.71 and 173.245.58.71.
owen.ns.cloudflare.com points to 2606:4700:58::adf5:3bdb, 2803:f800:50::6ca2:c1db, 2a06:98c1:50::ac40:21db, 108.162.193.219, 172.64.33.219 and 173.245.59.219.
Mail Servers
czerner.cz is served by two mail servers mail.protonmail.ch and mailsec.protonmail.ch.
czerner.cz shares the same mail server setup as other domains, for instance clayfreeman.com, fiibra.com, schulcms.ch, dchere.com and zozbox.com.
czerner.cz shares at least some mail servers with other domains, for example strause.org, rytc.info, larryomiller.com, eguza.com and skellis.net.
Host names with three IP numbers:
The host name mail.protonmail.ch resolves to 176.119.200.128, 185.70.42.128 and 185.205.70.128.
The host name mailsec.protonmail.ch resolves to 176.119.200.129, 185.70.42.129 and 185.205.70.129.