centralkontoret.dk is a .dk domain served by 3 nameservers (ns1.dns.services, ns2.dns.services, ns3.dns.services). It was registered on 19 February 2014 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 57.129.53.233 is hosted by OVH SAS (AS16276) in Germany. Mail is handled by mail.flexmail.dk. The zone is DNSSEC-signed and validates, 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 57.129.53.233 | 564s | flex30.flexnet.dk | AS16276 | OVH SAS | 57.128.0.0/15 | 🇩🇪 Germany | Frankfurt am Main |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 600s | mail.flexmail.dk | 57.129.53.233 | flex30.flexnet.dk | AS16276 OVH SAS |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | flex30.flexnet.dk → 57.129.53.233 |
| 🔶 Autoconfig | flex30.flexnet.dk → 57.129.53.233 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 0 | 0 | 443 | autoconfig.flexmail.dk |
| _autodiscover._tcp | 0 | 0 | 443 | mail.flexmail.dk |
| _imaps._tcp | 0 | 0 | 993 | mail.flexmail.dk |
| TXT Record |
|---|
| v=spf1 mx a -all |
| Policy | Record (centralkontoret.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx a -all |
| www | 57.129.53.233 (AS16276) (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 | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~1024 bit below 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| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.centralkontoret.dk | centralkontoret.dk |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.flexmail.dk | DANE-EE · SPKI · SHA-256 | 75F4832CCD96AE280F4562E0DC166B64… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2022101537 |
| Primary NS (MNAME) | ns1.dns.services |
| Responsible (RNAME) | post@dns.services |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 1814400s |
| Minimum (neg-cache TTL) | 7200s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2014-02-19 |
| Expires | 2027-04-30 (195d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-10 07:34:46 | 880ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-25 23:09:34 shown | 841ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-06 12:54:25 | 751ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-03 17:41:39 | 636ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-29 21:06:24 | 1286ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-28 16:41:31 | 879ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 20:06:45 | 612ms | 3 NS 1 A 1 MX | 🔒 Secure |