centerforcyber.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 25 November 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 172.205.114.33 is hosted by Microsoft Corporation (AS8075) in Ireland. Mail is handled by mail.admin-securefirst.dk. The zone is DNSSEC-signed and validates, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 172.205.114.33 | 3600s | — | AS8075 | Microsoft Corporation | 172.200.0.0/13 | 🇮🇪 Ireland | Dublin |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mail.admin-securefirst.dk | 159.69.242.34 | mail.admin-securefirst.dk | AS24940 Hetzner Online GmbH |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 172.205.114.33 |
| 🔶 Autoconfig | 172.205.114.33 |
| TXT Record |
|---|
| v=spf1 mx a -all |
| Policy | Record (centerforcyber.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx a -all |
| Policy | Record (_dmarc.centerforcyber.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine |
| www | 172.205.114.33 (AS8075) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| 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 |
| Selector | CNAME | Key |
|---|---|---|
| dkim | — | RSA · ~2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 2/10 · 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 | 2025112504 |
| 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 | Simply.com A/S |
| Registered | 2025-11-25 |
| Expires | 2026-11-24 (31d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-21 12:57:44 | 570ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-12 23:48:04 | 581ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-03 14:24:09 | 560ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 13:58:55 | 1039ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-23 23:33:54 | 522ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-10 09:22:10 | 617ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-28 05:34:31 shown | 1323ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 20:05:30 | 625ms | 3 NS 1 A 1 MX | 🔒 Secure |