| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns3.crs-net.cz | 81.0.206.87 | t3.crs-net.cz | AS15685 CASABLANCA INT a.s. |
| ns4.crs-net.cz | 81.0.206.88 | m3.crs-net.cz | AS15685 CASABLANCA INT a.s. |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 81.0.206.87 | 3600s | t3.crs-net.cz | AS15685 | CASABLANCA INT a.s. | 81.0.206.0/23 | 🇨🇿 Czechia | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | posta.crs-net.cz | 81.0.206.88 | m3.crs-net.cz | AS15685 CASABLANCA INT a.s. |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 0 | 1 | 443 | autodiscover.crs-net.cz |
| TXT Record |
|---|
| v=spf1 mx a ~all |
| Policy | Record (noblas.dk) |
|---|---|
| ~all (soft fail) | v=spf1 mx a ~all |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026021903 |
| Primary NS (MNAME) | ns3.crs-net.cz |
| Responsible (RNAME) | servis@crs-net.cz |
| Refresh | 7200s |
| Retry | 540s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |