mx.ipnetwork.cz - dns.ninja
mx.ipnetwork.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 81.2.197.168🇨🇿 INTERNET-CZ81.2.192.0/18 INTERNET CZ, a.s. | ||||||
| PTR | mx.ipnetwork.cz | ||||||
ipnetwork.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 81.91.86.11🇨🇿 WEB4U81.91.80.0/21 | ||||||
| NS | ns2.web4u.cz ⭐ | ||||||
| NS | ns.web4u.cz | ||||||
| MX | mx.ipnetwork.cz ⭐ | ||||||
| TXT | v=spf1 mx ip4:81.2.197.167 ip4:81.2.197.168 ~all | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2025-12-08 #0 | ||||||
PTR for
MX for
Previously MX for
Same first word
Similar names
DNS History
2 records (1 active, 1 former)
●A81.2.197.1682026-03-08 → 2026-06-08 · 3 obs
○ 2016-12-31 04:50:28
● 2026-03-08 10:32:42
● 2026-06-08 03:53:32
● 2026-03-08 10:32:42
● 2026-06-08 03:53:32
○A81.91.80.1902015-05-28 → 2016-12-31 · 4 obs
● 2015-05-28 01:37:32
● 2016-12-31 04:50:28
○ 2026-03-08 10:32:42
○ 2026-06-08 03:53:32
● 2016-12-31 04:50:28
○ 2026-03-08 10:32:42
○ 2026-06-08 03:53:32
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| ipnetwork.cz | ns.web4u.cz, ns2.web4u.cz | 4 records |
✅ Authoritative Response
Server:85.207.53.12
NS records: ns.web4u.cz, ns2.web4u.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 898ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.2.197.168 |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns2.web4u.cz, ns.web4u.cz, ns2.web4u.cz...)
Analysis
Mail Server Role
Mail for perfecta.cz, ipnetwork.cz, znovu.cz, innera.cz, perfecta-zelezarstvi.cz and a few other domains is handled by mx.ipnetwork.cz.
IP Addresses
mx.ipnetwork.cz has exactly one IP address — 81.2.197.168.
Host names like 168.197.forpsi.net are further examples that share IP numbers with mx.ipnetwork.cz.