rtcas.dk is a .dk domain served by 4 nameservers (ns1.c1.sdc-hosting.com, ns1.c2.sdc-hosting.com, ns1.c3.sdc-hosting.com and 1 more). It was registered on 5 January 2009 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. The zone is not DNSSEC-signed, 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.
| TXT Record |
|---|
| v=spf1 mx -all |
| Policy | Record (rtcas.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx -all |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves rtcas.dk: no address www.rtcas.dk: no address |
| Wildcard | No |
DNS lookups: 1/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 59 |
| Primary NS (MNAME) | ns1.c1.sdc-hosting.com |
| Responsible (RNAME) | support@sdc-hosting.com |
| Refresh | 900s |
| Retry | 300s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2009-01-05 |
| Expires | 2027-01-31 (105d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 15:45:52 | 1258ms | 4 NS 0 A 3 MX | 🔓 Insecure |
| 2026-07-02 12:35:11 | 2516ms | 4 NS 0 A 3 MX | 🔓 Insecure |
| 2026-06-22 03:25:59 shown | 1663ms | 4 NS 0 A 0 MX | 🔓 Insecure |
| 2026-06-21 13:26:02 | 1116ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-18 02:26:15 | 1620ms | 4 NS 0 A 3 MX | 🔓 Insecure |