centertand.dk is a .dk domain served by 4 nameservers (ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com and 1 more). It was registered on 22 January 2016 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 77.247.77.143 is hosted by Rackhosting.com ApS (AS31590) in Denmark. Mail is handled by mx1.emailsecurity.email, mx2.emailsecurity.email. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|---|---|---|---|
| 77.247.77.143 | 3600s | vps138.rackhosting.com | AS31590 | Rackhosting.com ApS | 77.247.64.0/20 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx1.emailsecurity.email | 168.119.19.199 | mx1.emailsecurity.email | AS24940 Hetzner Online GmbH |
| 20 | 3600s | mx2.emailsecurity.email | 168.119.19.200 | mx2.emailsecurity.email | AS24940 Hetzner Online GmbH |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.56 |
| 🔶 Autoconfig | 94.231.106.72 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| brevo-code:b3f5ab0a4c0e6aa4c742a36ae86e784d |
| MS=ms35171331 |
| mscid=WErcwi7r1YCxPBfKfreR4f2W6l/CqmSmwSx0L5AugaHw1pdGiM3ZwnQZiifLOwwAFDr7/kHo847i/K2N5b5/HA== |
| v=spf1 a mx include:spf.protection.outlook.com include:spf.rpost.net -all |
| Policy | Record (centertand.dk) |
|---|---|
| -all (hard fail) | v=spf1 a mx include:spf.protection.outlook.com include:spf.rpost.net -all |
| Policy | Record (_dmarc.centertand.dk) |
|---|---|
| p=reject | v=DMARC1;p=reject;pct=100; |
| www | 94.231.106.72 (AS48854) (address records, no CNAME) |
| www vs bare domain | Different networks (all like this) |
| Wildcard | Yes: any name under the zone resolves |
| Selector | CNAME | Key |
|---|---|---|
| — | 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: 4/10 · 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 | unsigned answer |
| Field | Value |
|---|---|
| Serial | 1 |
| Primary NS (MNAME) | ns1.bdm.microsoftonline.com |
| Responsible (RNAME) | azuredns-hostmaster@microsoft.com |
| Refresh | 3600s |
| Retry | 300s |
| Expire | 2419200s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2016-01-22 |
| Expires | 2027-01-31 (106d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 17:40:28 | 2722ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-24 14:40:05 shown | 5648ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-24 02:55:19 | 890ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-23 09:58:24 | 1178ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-16 20:05:03 | 916ms | 4 NS 1 A 2 MX | 🔓 Insecure |