masterstroke.cz - robtex.com
masterstroke.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 81.91.86.10 | ||||||
| NS | ns2.web4u.cz ⭐ | ||||||
| NS | ns.web4u.cz | ||||||
| MX | mx.web4u.cz ⭐ | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2004-08-25 #10 | ||||||
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=1791816445 | ||||||
Same first word
Similar names
DNS History
5 records (4 active, 1 former)
○MXmail.masterstroke.cz2015-07-03 → 2016-11-26 · 4 obs
● 2015-07-03 08:01:28
● 2016-11-26 13:23:30
○ 2026-08-20 18:14:48
○ 2026-10-12 15:30:20
● 2016-11-26 13:23:30
○ 2026-08-20 18:14:48
○ 2026-10-12 15:30:20
●MXmx.web4u.cz2026-08-20 → 2026-10-12 · 3 obs
○ 2016-11-26 13:23:30
● 2026-08-20 18:14:48
● 2026-10-12 15:30:20
● 2026-08-20 18:14:48
● 2026-10-12 15:30:20
●A81.91.86.102015-07-03 → 2026-10-12 · 2 obs
● 2015-07-03 08:01:28
● 2026-10-12 15:30:20
● 2026-10-12 15:30:20
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | 8 records |
| masterstroke.cz | ns.web4u.cz, ns2.web4u.cz | 4 records |
✅ Authoritative Response
Server:185.14.224.241
NS records: ns.web4u.cz, ns2.web4u.cz
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for masterstroke.cz (unsigned zone)
⏱️ Timing
Total: 1245ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.86.10 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 1 | mx.web4u.cz (pri: 10) |
| SOA | 1 | ns.web4u.cz admin.web4u.cz |
📌 Glue Records Collected
Total: 12
In-bailiwick: 8 (a.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz...)
Out-of-bailiwick: 4 (ns.web4u.cz, ns.web4u.cz, ns2.web4u.cz...)
Analysis
IP Addresses
masterstroke.cz points to a single IP number: 81.91.86.10.
Name Servers
masterstroke.cz is served by two delegated name servers, ns2.web4u.cz and ns.web4u.cz.