4d.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 28 February 1996 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 51.144.107.53 is hosted by Microsoft Corporation (AS8075) in The Netherlands. Mail is handled by 4d-dk.mail.protection.outlook.com. 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 |
|---|---|---|---|---|---|---|---|
| 51.144.107.53 | 600s | — | AS8075 | Microsoft Corporation | 51.144.0.0/15 | 🇳🇱 The Netherlands | Amsterdam |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.40 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 0 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| google-site-verification=uNMmmvvw5p2n0JJ329b765455UBY9iEN26AuBLZdq7U |
| linkedin-site-verification=69ed58e2-3e34-4b63-a2d2-188e1d148ae1 |
| v=spf1 ip4:195.184.33.126 include:spf.protection.outlook.com include:147824781.spf02.hubspotemail.net -all |
| Policy | Record (4d.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:195.184.33.126 include:spf.protection.outlook.com include:147824781.spf02.hubspotemail.net -all |
| Policy | Record (_dmarc.4d.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www CNAME | 4d-site-ejf3fcdxeubcgycn.westeurope-01.azurewebsites.net (all on azurewebsites.net) → 13.69.68.14 (AS8075) |
| 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: 2/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.4d.dk | TWE4FrwwiHRgMujDXqyRxiDOK5982GdjQ7wBra8sw88 |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026062603 |
| 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 | 1996-02-28 |
| Expires | 2027-03-31 (161d) |
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).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 19:30:31 | 1547ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-07 20:57:18 | 889ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-07 18:52:17 | 3065ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-03 15:07:38 | 979ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-03 00:58:17 | 1575ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-23 21:47:32 | 855ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-05 06:21:39 | 1170ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-28 04:03:26 | 1041ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-27 09:42:31 | 1462ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-27 05:20:13 shown | 1696ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-27 00:07:01 | 1030ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-23 10:55:00 | 972ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-16 12:36:58 | 778ms | 2 NS 1 A 1 MX | 🔒 Secure |