| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 212.237.249.12 | 3600s | lb1.builder.nu | AS48854 | team.blue Denmark A/S | 212.237.248.0/23 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 300s | . Null MX — domain accepts no email (RFC 7505) | |||
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026082801 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Scanned At | Duration | Records | DNSSEC | |
|---|---|---|---|---|
| 2026-08-29 04:16:34 | 1009ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-08-02 19:36:31 | 4504ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-06-27 14:00:31 | 451ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-06-20 19:47:26 | 397ms | 2 NS 1 A 1 MX | ⚠️ Bogus | View |
| 2026-06-17 18:19:17 | 454ms | 2 NS 1 A 0 MX | 🔒 Secure | View |