certen.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 29 November 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 46.30.215.191 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by mx1.pub.mailpod14-cph3.one.com, mx2.pub.mailpod14-cph3.one.com and 2 more. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 46.30.215.191 | 3599s | webforward.webpod17-cph3.one.com | AS51468 | One.com A/S | 46.30.208.0/21 | 🇩🇰 Denmark | Copenhagen |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 10800s | mx1.pub.mailpod14-cph3.one.com | 185.10.9.212 | mx1.pub.mailpod14-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx2.pub.mailpod14-cph3.one.com | 185.10.9.213 | mx2.pub.mailpod14-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx3.pub.mailpod14-cph3.one.com | 185.10.9.214 | mx3.pub.mailpod14-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx4.pub.mailpod14-cph3.one.com | 185.10.9.215 | mx4.pub.mailpod14-cph3.one.com | AS51468 One.com A/S |
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (certen.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.certen.dk) |
|---|---|
| p=reject | v=DMARC1;p=reject;sp=reject;adkim=s;aspf=s |
| www | 195.47.247.18 (AS51468) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 0/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod14-cph3.one.com | DANE-EE · SPKI · SHA-256 | F9CAE2DF0FCB54F04130769823BED77A… |
| SMTP _25._tcp.mx2.pub.mailpod14-cph3.one.com | DANE-EE · SPKI · SHA-256 | F9CAE2DF0FCB54F04130769823BED77A… |
| SMTP _25._tcp.mx3.pub.mailpod14-cph3.one.com | DANE-EE · SPKI · SHA-256 | F9CAE2DF0FCB54F04130769823BED77A… |
| SMTP _25._tcp.mx4.pub.mailpod14-cph3.one.com | DANE-EE · SPKI · SHA-256 | F9CAE2DF0FCB54F04130769823BED77A… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026060505 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2024-11-29 |
| Expires | 2026-11-28 (34d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-05 12:03:16 | 514ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-04 11:59:47 | 355ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 11:56:04 | 707ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-28 15:32:10 | 516ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-28 08:29:08 | 1102ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-26 00:23:22 | 860ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-09 04:19:54 | 1162ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-28 17:27:34 | 1555ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-25 03:43:50 shown | 3215ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-23 03:54:27 | 1106ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-23 00:48:02 | 955ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-21 01:06:17 | 566ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-20 23:47:41 | 1122ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-20 18:51:27 | 919ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-16 20:10:23 | 2675ms | 2 NS 1 A 4 MX | 🔒 Secure |