| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 176.21.102.122 | 43200s | 176-21-102-122-cable.dk.customer.tdc.net | AS3292 | TDC Holding A/S | 176.21.0.0/16 | 🇩🇰 Denmark | Kastrup |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 300s | . Null MX — domain accepts no email (RFC 7505) | |||
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 176.21.102.122 |
| 🔶 Autoconfig | 176.21.102.122 |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026081301 |
| 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 | |
|---|---|---|---|---|
| 2026-09-02 15:47:36 | 562ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-08-22 14:02:53 | 4751ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-08-14 06:14:54 | 2520ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-07-14 15:40:30 | 4610ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-07-13 02:01:57 | 4617ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-06-23 21:46:11 | 643ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-06-16 20:50:10 | 422ms | 2 NS 1 A 0 MX | 🔒 Secure | View |