siebuhr.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 30 September 2003 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 46.30.215.84 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 not DNSSEC-signed, has no 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 |
|---|---|---|---|---|---|---|---|
| 46.30.215.84 | — | webcluster1.webpod16-cph3.one.com | AS51468 | One.com A/S | 46.30.208.0/21 | 🇩🇰 Denmark | Copenhagen |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:2350:5:111:a6:6c43:4e71:7a63 | — | — | AS51468 | One.com A/S | 2a02:2350:0:0:0:0:0:0/32 | 🇩🇰 Denmark | Copenhagen |
| www | 46.30.215.111 2a02:2350:5:111:807f:1639:8b6b:76a3 (AS51468) (address records, no CNAME) |
| www vs bare domain | Same network siebuhr.dk: 46.30.215.111 2a02:2350:5:111:807f:1639:8b6b:76a3 (AS51468) www.siebuhr.dk: 46.30.215.111 2a02:2350:5:111:807f:1639:8b6b:76a3 (AS51468) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| 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 | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026053001 |
| 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 | 2003-09-30 |
| Expires | 2029-09-30 (1074d) |
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).
| Domain | Registrar |
|---|---|
| cphgophers.dk | Punktum dk A/S (direct) |
| gttrp.dk | Punktum dk A/S (direct) |
| sbhr.dk | Punktum dk A/S (direct) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-21 02:07:26 | 14073ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-07 18:38:05 | 739ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-06 14:07:20 | 604ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-06 19:11:05 | 907ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-21 08:36:42 | 1499ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-06 17:43:07 | 959ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-26 19:10:19 | 827ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-17 13:00:26 shown | 821ms | 2 NS 1 A 4 MX | 🔓 Insecure |