secure-mailcheck.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was registered on 24 February 2026 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 216.24.57.1 is hosted by Render (AS397273) in United States. The zone is DNSSEC-signed and validates, 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 216.24.57.1 | 3600s | ip-216-24-57-1.ingress.render.com | AS397273 | Render | 216.24.57.0/24 | 🇺🇸 United States | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 216.24.57.1 |
| 🔶 Autoconfig | 216.24.57.1 |
| Policy | Record (_dmarc.secure-mailcheck.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www | Address record (no CNAME) |
| 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 |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026022406 |
| Primary NS (MNAME) | ns1.curanet.dk |
| Responsible (RNAME) | hostmaster@curanet.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | CURANET A/S |
| Registered | 2026-02-24 |
| Expires | 2027-02-23 (128d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 15:24:56 shown | 434ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-26 13:04:03 | 482ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-27 15:43:01 | 464ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-17 13:30:59 | 4445ms | 2 NS 1 A 0 MX | 🔒 Secure |