| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 176.21.113.227 | 3600s | 176-21-113-227-cable.dk.customer.tdc.net | AS3292 | TDC Holding A/S | 176.21.0.0/16 | 🇩🇰 Denmark | Copenhagen |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | susannesmusikskole.dk | 176.21.113.227 | 176-21-113-227-cable.dk.customer.tdc.net | AS3292 TDC Holding A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 176.21.113.227 |
| 🔶 Autoconfig | 176.21.113.227 |
| TXT Record |
|---|
| v=spf1 a mx ip4:176.21.113.227 -all |
| Policy | Record (susannesmusikskole.dk) |
|---|---|
| -all (hard fail) | v=spf1 a mx ip4:176.21.113.227 -all |
| Policy | Record (_dmarc.susannesmusikskole.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; pct=100; rua=mailto:postmaster@klestrup.com |
| Flags | Tag | Value |
|---|---|---|
| 0 | issue | letsencrypt.org |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026082501 |
| 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 00:38:22 | 563ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-08-31 21:18:30 | 672ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-08-27 14:28:54 | 903ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-08-25 19:34:15 | 977ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-08-07 09:36:37 | 4642ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-07-26 03:30:27 | 735ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-07-02 18:17:41 | 611ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-06-27 05:28:38 | 709ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-06-18 03:17:48 | 2555ms | 2 NS 1 A 1 MX | 🔒 Secure | View |