mailin1.decoder.cz - robtex.com
mailin1.decoder.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2a00:4b40:aaaa:2101:45:13:137:85🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32 | ||||||
| A | 45.13.137.9🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24 | ||||||
decoder.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 75.2.70.75🇺🇸 Amazon75.2.64.0/20 | ||||||
| A | 99.83.190.102🇺🇸 Amazon99.83.176.0/20 | ||||||
| NS | ns1.websupport.cz ⭐ | ||||||
| NS | ns2.websupport.cz | ||||||
| NS | ns3.websupport.eu | ||||||
| MX | mailin1.decoder.cz ⭐ | ||||||
| MX | mailin2.decoder.cz(100) | ||||||
| SOA | ns1.websupport.czadmin@websupport.cz serial=1775042990 | ||||||
MX for
DNS History
2 records (2 active, 0 former)
●A2a00:4b40:aaaa:2101:45:13:137:852026-04-04 → 2026-07-12 · 2 obs
● 2026-04-04 18:16:58
● 2026-07-12 03:23:06
● 2026-07-12 03:23:06
●A45.13.137.92026-04-04 → 2026-07-12 · 2 obs
● 2026-04-04 18:16:58
● 2026-07-12 03:23:06
● 2026-07-12 03:23:06
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| decoder.cz | ns1.websupport.cz, ns3.websupport.eu, ns2.websupport.cz | - |
✅ Authoritative Response
Server:45.10.97.11
NS records: ns1.websupport.cz, ns3.websupport.eu, ns2.websupport.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 955ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 45.13.137.9 |
| AAAA | 1 | 2a00:4b40:aaaa:2101:45:13:137:85 |
Analysis
Mail Server Role
The mail server mailin1.decoder.cz processes email for decoder.cz.
mailin2.decoder.cz routinely functions as a mail server together with mailin1.decoder.cz.
IP Addresses
mailin1.decoder.cz points to the IP addresses 45.13.137.9 and 2a00:4b40:aaaa:2101:45:13:137:85
Two other host names, along with mailin2.bytovydesign.sk, mailin2.apostolov.cz and mailin1.partnercis.cz, also share IP numbers with mailin1.decoder.cz.