3rcentre.dk is a .dk domain served by 2 nameservers (ns6.sitnet.dk, ns7.sitnet.dk). It was registered on 12 February 2014 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.153.154.38 is hosted by Statens IT (AS58282) in Denmark. 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns6.sitnet.dk | 107.162.234.197 2604:e180:1071::3:1 |
— — |
AS55002 F5, Inc. AS55002 F5, Inc. |
| ns7.sitnet.dk | 107.162.176.221 2604:e180:1071::ffff:6ba2:b0dd |
— — |
AS55002 F5, Inc. AS55002 F5, Inc. |
| TXT Record |
|---|
| v=spf1 ip4:194.182.109.192/26 ip4:188.64.157.0/28 mx -all |
| Policy | Record (3rcentre.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:194.182.109.192/26 ip4:188.64.157.0/28 mx -all |
| Policy | Record (_dmarc.3rcentre.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; sp=reject; rua=mailto:tcod1eh2@ag.eu.dmarcadvisor.com; |
| www CNAME | 3rcenter.dk (all on 3rcenter.dk) → 178.72.21.198 (AS3342) |
| www vs bare domain | Different networks (all like this) |
| Wildcard | No |
| Denial of existence | NSEC3 · 10 iterations · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 1/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 9009 |
| Primary NS (MNAME) | ns6.sitnet.dk |
| Responsible (RNAME) | hostmaster@statens-it.dk |
| Refresh | 10800s |
| Retry | 1080s |
| Expire | 2419200s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2014-02-12 |
| Expires | 2029-02-28 (865d) |
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 |
|---|---|---|---|
| 2026-10-15 21:51:40 | 17996ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-14 20:27:20 | 6293ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-13 19:24:25 | 5102ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-12 17:43:58 | 3048ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-11 16:02:40 | 1527ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-10 13:47:00 | 1313ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-09 10:34:39 | 1653ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-08 10:01:26 | 17606ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-07 09:52:07 | 5182ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-06 09:17:45 | 5074ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-05 08:17:12 | 9657ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-04 07:58:21 | 5360ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-03 07:57:39 | 5072ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-02 07:54:41 | 17382ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-01 07:52:49 | 5095ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-30 19:11:13 | 9647ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-29 18:57:22 | 1324ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-28 18:46:46 | 17119ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-27 18:32:32 | 17490ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-26 18:22:08 | 1222ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-25 18:02:35 | 1371ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-24 17:50:55 | 17448ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-23 17:29:58 | 1577ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-22 07:04:59 | 1425ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-19 04:51:19 shown | 17981ms | 2 NS 1 A 0 MX | 🔒 Secure |