nummer21.dk is a .dk domain served by 2 nameservers (ns.dandomain.dk, ns2.dandomain.dk). It was registered on 8 April 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mx1.dandomain.dk, mx2.dandomain.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 this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 93.191.158.86 | — | linux215.dandomain.dk | AS48854 | — | — | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | — | mx1.dandomain.dk | 212.237.249.50 | mx1.dandomain.dk | AS48854 team.blue Denmark A/S |
| 20 | — | mx2.dandomain.dk | 46.36.209.11 | mx2.dandomain.dk | AS48854 team.blue Denmark A/S |
| TXT Record |
|---|
| v=spf1 include:spf.dandomain.dk -all |
| Policy | Record (nummer21.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.dandomain.dk -all |
| www | 93.191.158.86 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| 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: 3/10 · 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 | 2024041202 |
| 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 | 2024-04-08 |
| Expires | 2027-04-07 (169d) |
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 |
|---|---|---|---|
| 2026-09-29 21:08:04 | 559ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-27 05:59:48 | 629ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-17 18:34:27 | 16989ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-20 16:28:58 | 534ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-17 20:10:47 shown | 584ms | 2 NS 1 A 2 MX | 🔒 Secure |