sejerborg.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 27 September 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 77.111.240.176 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by mx1.pub.mailpod11-cph3.one.com, mx2.pub.mailpod11-cph3.one.com and 2 more. The zone is DNSSEC-signed and validates, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 77.111.240.176 | 600s | webcluster49.webpod11-cph3.one.com | AS51468 | One.com A/S | 77.111.240.0/22 | 🇩🇰 Denmark | Copenhagen |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 600s | mx1.pub.mailpod11-cph3.one.com | 104.37.34.230 | mx1.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 600s | mx2.pub.mailpod11-cph3.one.com | 104.37.34.231 | mx2.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 600s | mx3.pub.mailpod11-cph3.one.com | 104.37.34.232 | mx3.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 600s | mx4.pub.mailpod11-cph3.one.com | 104.37.34.233 | mx4.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 77.111.240.176 |
| 🔶 Autoconfig | 77.111.240.176 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:2350:5:102:8086:4ae1:d0e5:3ba2 | 600s | — | AS51468 | One.com A/S | 2a02:2350:0:0:0:0:0:0/32 | 🇩🇰 Denmark | Copenhagen |
| Policy | Record (_dmarc.sejerborg.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www | 77.111.240.176 2a02:2350:5:102:8086:4ae1:d0e5:3ba2 (AS51468) (address records, no CNAME) |
| www vs bare domain | Same network sejerborg.dk: 77.111.240.176 2a02:2350:5:102:8086:4ae1:d0e5:3ba2 (AS51468) www.sejerborg.dk: 77.111.240.176 2a02:2350:5:102:8086:4ae1:d0e5:3ba2 (AS51468) |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| SMTP _25._tcp.mx2.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| SMTP _25._tcp.mx3.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| SMTP _25._tcp.mx4.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026052101 |
| 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 | 1999-09-27 |
| Expires | 2027-09-30 (347d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-07 11:17:00 | 2251ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-01 06:13:26 | 759ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-27 14:47:49 | 962ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-23 18:33:12 | 2718ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-22 12:51:11 | 6174ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-14 16:06:16 | 2862ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-27 05:46:29 | 1921ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-26 09:08:50 | 737ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-24 15:18:30 | 5362ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-22 23:46:51 | 1150ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 02:35:28 shown | 1333ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-17 12:11:41 | 671ms | 2 NS 1 A 4 MX | 🔒 Secure |