53515151.dk is a .dk domain served by 2 nameservers (ns1.dnsserver.dk, ns2.dnsserver.dk). It was registered on 13 May 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by 53515151-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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns1.dnsserver.dk | — | — | — |
| ns2.dnsserver.dk | — | — | — |
| TXT Record |
|---|
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (53515151.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.53515151.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; adkim=s; aspf=s; |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves 53515151.dk: no address www.53515151.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 |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-53515151-dk._domainkey.dw1pvrinvestdk.q-v1.dkim.mail.microsoft | RSA · ~2048 bit |
| selector2 | selector2-53515151-dk._domainkey.dw1pvrinvestdk.q-v1.dkim.mail.microsoft | RSA · ~2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
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 | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2026060401 |
| Primary NS (MNAME) | ns1.dnsserver.dk |
| Responsible (RNAME) | hostmaster@curanet.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2019-05-13 |
| Expires | 2027-05-31 (226d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-02 15:13:07 | 920ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-30 16:21:06 | 1481ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-29 14:43:54 | 1448ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-27 01:47:53 | 1324ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-26 21:11:35 | 800ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-20 11:35:22 | 2295ms | 2 NS 0 A 0 MX | 🔒 Secure |
| 2026-06-16 12:51:55 shown | 2077ms | 2 NS 0 A 1 MX | 🔒 Secure |