klasse-centeret.dk is a .dk domain served by 2 nameservers (ns.vordbkom.dk, ns.vordbskoler.dk). It was registered on 8 June 2012 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 5.56.147.142 is hosted by GlobalConnect A/S (AS31027) 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 our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns.vordbkom.dk | 131.165.202.1 | ns.vordbkom.dk | AS6834 KMD A/S |
| ns.vordbskoler.dk | 5.56.147.154 | — | AS31027 GlobalConnect A/S |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 5.56.147.142 | 11700s | — | AS31027 | GlobalConnect A/S | 5.56.144.0/20 | 🇩🇰 Denmark | Karlslunde |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 5.56.147.142 |
| 🔶 Autoconfig | 5.56.147.142 |
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (klasse-centeret.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.klasse-centeret.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:60f69872d8c04@dmarc.centerasecurity.com; |
| www | 5.56.147.142 (AS31027) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC3 · 50 iterations · 8-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 0/10 · 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 | 2013020754 |
| Primary NS (MNAME) | ns.vordbkom.dk |
| Responsible (RNAME) | hostmaster |
| Refresh | 14400s |
| Retry | 7200s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 900s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2012-06-08 |
| Expires | 2027-06-30 (255d) |
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 |
|---|---|---|---|
| 2026-10-12 20:07:33 shown | 2944ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-11 18:42:11 | 1817ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-08 14:20:02 | 519ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-07 05:19:44 | 3989ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-03 03:23:36 | 705ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-02 03:21:36 | 626ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-26 02:05:06 | 726ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-25 01:45:15 | 1749ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-24 00:21:42 | 1751ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-16 18:38:50 | 1008ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-11 02:56:47 | 721ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-04 00:52:22 | 624ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-31 13:27:00 | 1744ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-28 11:24:33 | 2449ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-22 23:27:28 | 914ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-21 23:10:23 | 9615ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-17 14:03:23 | 2428ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-15 04:26:17 | 12251ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-11 15:23:10 | 753ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-06 15:01:11 | 651ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-02 20:15:17 | 2978ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-25 21:00:52 | 2425ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-20 10:13:26 | 635ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-14 10:45:00 | 16549ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-09 02:25:36 | 900ms | 2 NS 1 A 0 MX | 🔒 Secure |