os2korrespondance.dk is a .dk domain served by 4 nameservers (ns-111.awsdns-13.com, ns-1349.awsdns-40.org, ns-1880.awsdns-43.co.uk and 1 more). It was registered on 21 August 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. The zone is not DNSSEC-signed, 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.
| TXT Record |
|---|
| v=spf1 include:amazonses.com -all |
| Policy | Record (os2korrespondance.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:amazonses.com -all |
| Policy | Record (_dmarc.os2korrespondance.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; adkim=s; aspf=s |
| www CNAME | d3kydodddmekvb.cloudfront.net (all on cloudfront.net) |
| www vs bare domain | Only www resolves os2korrespondance.dk: no address (all like this)www.os2korrespondance.dk: 3.174.18.100 3.174.18.112 3.174.18.122 3.174.18.26 (AS16509) |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 1/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.os2korrespondance.dk | _acme-challenge.9ac01310829aae848a5b299bb9e38ac9fdd3e0d949697c77.upcloudlb.com |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 1 |
| Primary NS (MNAME) | ns-973.awsdns-57.net |
| Responsible (RNAME) | awsdns-hostmaster@amazon.com |
| Refresh | 7200s |
| Retry | 900s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2023-08-21 |
| Expires | 2027-08-20 (305d) |
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).
| Domain | Registrar |
|---|---|
| internal-dns.dk | Simply.com A/S |
| os2compliance.dk | Simply.com A/S |
| os2faktor.dk | Simply.com A/S |
| os2fildeling.dk | Simply.com A/S |
| os2sync.dk | Simply.com A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 20:18:08 shown | 2846ms | 4 NS 0 A 0 MX | 🔓 Insecure |
| 2026-09-21 18:13:34 | 12016ms | 4 NS 0 A 0 MX | 🔓 Insecure |
| 2026-09-13 01:29:23 | 3168ms | 4 NS 0 A 0 MX | 🔓 Insecure |
| 2026-08-26 23:52:10 | 635ms | 4 NS 0 A 0 MX | 🔓 Insecure |
| 2026-06-30 00:13:02 | 819ms | 4 NS 0 A 0 MX | 🔓 Insecure |
| 2026-06-28 06:12:12 | 875ms | 4 NS 0 A 0 MX | 🔓 Insecure |
| 2026-06-28 05:45:26 | 4725ms | 4 NS 0 A 0 MX | 🔓 Insecure |
| 2026-06-26 11:50:39 | 4141ms | 4 NS 0 A 0 MX | 🔓 Insecure |
| 2026-06-22 16:22:21 | 1051ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-18 08:46:30 | 2566ms | 4 NS 0 A 0 MX | 🔓 Insecure |