| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 20.16.49.251 | 3600s | — | AS8075 | Microsoft Corporation | 20.0.0.0/11 | 🇳🇱 The Netherlands | Amsterdam |
| 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 | 2026081101 |
| 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 | |
|---|---|---|---|---|
| 2026-09-03 13:54:52 | 4424ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-08-12 15:56:31 | 2499ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-07-17 22:53:03 | 674ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-07-12 14:03:06 | 8454ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-06-25 04:18:40 | 533ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-06-17 00:50:56 | 349ms | 2 NS 1 A 0 MX | 🔒 Secure | View |