73664000.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 28 September 2015 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.239.98.43 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mx1.onlinemail.io, mx2.onlinemail.io. The zone is not DNSSEC-signed, 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 193.239.98.43 | 3600s | — | AS48854 | team.blue Denmark A/S | 193.239.96.0/22 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx1.onlinemail.io | 185.21.42.12 | mx1.onlinemail.io | AS48854 team.blue Denmark A/S |
| 20 | 3600s | mx2.onlinemail.io | 46.36.208.16 | mx2.onlinemail.io | AS48854 team.blue Denmark A/S |
| www CNAME | 73664000.dk (all on 73664000.dk) → 193.239.98.43 (AS48854) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026101200 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2015-09-28 |
| Expires | 2027-09-30 (348d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 16:42:34 shown | 1866ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-06 01:25:48 | 700ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-04 01:14:39 | 515ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-30 00:54:43 | 436ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-26 17:01:44 | 9504ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-23 10:49:12 | 595ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-26 08:59:26 | 854ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-25 20:25:49 | 1672ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-21 17:18:07 | 450ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-16 12:57:44 | 1299ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-16 12:50:18 | 1351ms | 2 NS 1 A 2 MX | 🔓 Insecure |