gladundervisning.dk is a .dk domain served by 2 nameservers (ns.dandomain.dk, ns2.dandomain.dk). It was registered on 13 November 2003 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by backupmail.gullestrupnet.dk. The zone is DNSSEC-signed and validates, has no 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.
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 50 | 3600s | backupmail.gullestrupnet.dk | 82.165.203.134 | mail51.gullestrupnet.dk | AS8560 IONOS SE |
| TXT Record |
|---|
| v=spf1 ip4:213.173.228.64/27 ip4:89.249.3.0/24 ip4:213.173.228.128/25 a mx -all |
| Policy | Record (gladundervisning.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:213.173.228.64/27 ip4:89.249.3.0/24 ip4:213.173.228.128/25 a mx -all |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves gladundervisning.dk: no address www.gladundervisning.dk: no address |
| Wildcard | No |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 2/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2020052802 |
| Primary NS (MNAME) | ns.dandomain.dk |
| Responsible (RNAME) | hostmaster@dandomain.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | DANDOMAIN A/S |
| Registered | 2003-11-13 |
| Expires | 2026-11-30 (38d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 12:14:47 shown | 441ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-24 19:03:07 | 480ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-03 11:46:58 | 499ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-07-02 00:22:10 | 551ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-17 09:48:18 | 490ms | 2 NS 0 A 1 MX | 🔒 Secure |