sezer.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 25 February 2004 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 136.243.21.239 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by mx1.pub.mailpod12-cph3.one.com, mx2.pub.mailpod12-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 |
|---|---|---|---|---|---|---|---|
| 136.243.21.239 | 3600s | s3.moonstar.host | AS24940 | Hetzner Online GmbH | 136.243.0.0/16 | 🇩🇪 Germany | Falkenstein |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 10800s | mx1.pub.mailpod12-cph3.one.com | 104.37.34.246 | mx1.pub.mailpod12-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx2.pub.mailpod12-cph3.one.com | 104.37.34.247 | mx2.pub.mailpod12-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx3.pub.mailpod12-cph3.one.com | 104.37.34.248 | mx3.pub.mailpod12-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx4.pub.mailpod12-cph3.one.com | 104.37.34.249 | mx4.pub.mailpod12-cph3.one.com | AS51468 One.com A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 136.243.21.239 |
| 🔶 Autoconfig | 136.243.21.239 |
| TXT Record |
|---|
| google-site-verification=SPnp8GHJXl6ukuEXPFSBjpnIFobVCE3U4JbhqLlaALU |
| v=spf1 +mx +a include:spf.postal.mhost.io include:_custspf.one.com ~all |
| Policy | Record (sezer.dk) |
|---|---|
| ~all (soft fail) | v=spf1 +mx +a include:spf.postal.mhost.io include:_custspf.one.com ~all |
| Policy | Record (_dmarc.sezer.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject |
| www | Exists, no address |
| www vs bare domain | www does not resolve (all like this) |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 4/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod12-cph3.one.com | DANE-EE · SPKI · SHA-256 | 2CDDC5D748A3C02AC19FF7BC33AA01A5… |
| SMTP _25._tcp.mx2.pub.mailpod12-cph3.one.com | DANE-EE · SPKI · SHA-256 | 2CDDC5D748A3C02AC19FF7BC33AA01A5… |
| SMTP _25._tcp.mx3.pub.mailpod12-cph3.one.com | DANE-EE · SPKI · SHA-256 | 2CDDC5D748A3C02AC19FF7BC33AA01A5… |
| SMTP _25._tcp.mx4.pub.mailpod12-cph3.one.com | DANE-EE · SPKI · SHA-256 | 2CDDC5D748A3C02AC19FF7BC33AA01A5… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026081302 |
| 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 | 2004-02-25 |
| Expires | 2027-02-28 (134d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 13:23:16 | 1450ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-08 06:51:41 | 1019ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-05 03:42:36 | 736ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-28 02:42:42 shown | 714ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-26 20:35:09 | 1185ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-14 02:10:53 | 1953ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-12 21:02:50 | 1034ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-26 13:19:49 | 1509ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-25 15:39:00 | 952ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-23 10:03:49 | 1170ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 14:37:06 | 1362ms | 2 NS 1 A 4 MX | 🔒 Secure |