c4u.dk is a .dk domain served by 2 nameservers (ns.nsd.dk, ns2.nsd.dk). It was registered on 30 October 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 45.79.249.226 is hosted by Akamai Connected Cloud (AS63949) in Germany. Mail is handled by c4u.dk. The zone is not DNSSEC-signed, has no 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns.nsd.dk | 172.104.147.68 | ns.nsd.dk | AS63949 Akamai Connected Cloud |
| ns2.nsd.dk | 62.242.205.2 | ns2.nsd.dk | AS3292 TDC Holding A/S |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 45.79.249.226 | 3600s | web001.nsdhosting.dk | AS63949 | Akamai Connected Cloud | 45.79.240.0/20 | 🇩🇪 Germany | Frankfurt am Main |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 20 | 3600s | c4u.dk | 45.79.249.226 | web001.nsdhosting.dk | AS63949 Akamai Connected Cloud |
| www | 45.79.249.226 (AS63949) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026090701 |
| Primary NS (MNAME) | ns.nsd.dk |
| Responsible (RNAME) | admin@ns.nsd.dk |
| Refresh | 3600s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2020-10-30 |
| Expires | 2027-10-31 (379d) |
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 |
|---|---|
| consulting4u.dk | Punktum dk A/S (direct) |
| consulting4you.dk | Punktum dk A/S (direct) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-14 21:16:31 | 861ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-13 19:46:58 | 1788ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-09 06:48:16 | 1410ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-07 06:45:40 | 1353ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-06 03:48:49 | 979ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-01 03:17:25 | 705ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-30 04:00:57 | 830ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-30 02:57:36 | 1223ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-29 02:43:06 | 973ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-26 01:49:55 | 600ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-25 15:18:41 | 745ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-23 14:16:27 | 799ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-21 00:19:20 | 1946ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-13 23:00:08 shown | 1890ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-05 02:43:32 | 725ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 01:16:58 | 1336ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-20 10:36:22 | 1856ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-19 04:17:26 | 835ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-17 23:50:15 | 1413ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-15 07:35:15 | 2517ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-06 16:19:36 | 904ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-03 01:09:36 | 1909ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-25 02:51:27 | 2507ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-24 02:23:51 | 2530ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-10 14:49:55 | 965ms | 2 NS 1 A 1 MX | 🔓 Insecure |