mt-holding.dk is a .dk domain served by 4 nameservers (ns1-37.azure-dns.com, ns2-37.azure-dns.net, ns3-37.azure-dns.org and 1 more). It was registered on 27 October 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mtholding-dk0e.mail.protection.outlook.com. The zone is not DNSSEC-signed, 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.
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.8 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (mt-holding.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.mt-holding.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves mt-holding.dk: no address www.mt-holding.dk: no address |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-mtholding-dk0e._domainkey.mtholdingdk.onmicrosoft.com | 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: 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 | 1 |
| Primary NS (MNAME) | ns1-37.azure-dns.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 | 2022-10-27 |
| Expires | 2030-10-26 (1464d) |
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).
| Domain | Registrar |
|---|---|
| 149.dk | Punktum dk A/S (direct) |
| bilerhelsingor.dk | Punktum dk A/S (direct) |
| cpex.dk | Simply.com A/S |
| tnit.dk | Simply.com A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-08-27 15:02:58 shown | 1729ms | 4 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-27 09:47:43 | 852ms | 4 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-24 00:02:50 | 1151ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 13:55:48 | 2554ms | 4 NS 0 A 1 MX | 🔓 Insecure |