sql2.ddr.cz - robtex.com
sql2.ddr.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 81.91.92.89🇨🇿 WEB4U81.91.88.0/21 | ||||||
| PTR | w4s-wh.server4u.cz | ||||||
ddr.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 81.91.92.89🇨🇿 WEB4U81.91.88.0/21 | ||||||
| NS | ns2.web4u.cz ⭐ | ||||||
| NS | ns.web4u.cz | ||||||
| MX | w4s-wh.server4u.cz ⭐ | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2025-07-16 #1 | ||||||
Same first word
Similar names
DNS History
2 records (1 active, 1 former)
○A81.91.87.522015-05-20 → 2016-06-18 · 4 obs
● 2015-05-20 16:49:36
● 2016-06-18 11:02:56
○ 2026-02-27 11:33:06
○ 2026-05-15 13:41:06
● 2016-06-18 11:02:56
○ 2026-02-27 11:33:06
○ 2026-05-15 13:41:06
●A81.91.92.892026-02-27 → 2026-05-15 · 3 obs
○ 2016-06-18 11:02:56
● 2026-02-27 11:33:06
● 2026-05-15 13:41:06
● 2026-02-27 11:33:06
● 2026-05-15 13:41:06
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | d.ns.nic.cz, c.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz | - |
| ddr.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
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 928ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.92.89 |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns.web4u.cz, ns.web4u.cz, ns2.web4u.cz...)
Analysis
IP Addresses
sql2.ddr.cz resolves to one IP number: 81.91.92.89.
other host names including mail.playdance.eu, viso.cz, ddr.cz, vizo.cz and playdance.eu share IP numbers with sql2.ddr.cz.