mdm-sdb.dk is a .dk domain served by 4 nameservers (ns1-02.azure-dns.com, ns2-02.azure-dns.net, ns3-02.azure-dns.org and 1 more). It was registered on 17 February 2014 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by smtp3.sonderborg.dk. 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.
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | smtp3.sonderborg.dk | 80.62.237.13 80.62.237.13 |
13.1-126.237.62.80.in-addr.arpa smtp3.sonderborg.dk |
AS3292 TDC Holding A/S AS3292 TDC Holding A/S |
| TXT Record |
|---|
| v=spf1 include:_spf_a.sonderborg.dk include:_spf_b.sonderborg.dk -all |
| Policy | Record (mdm-sdb.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_spf_a.sonderborg.dk include:_spf_b.sonderborg.dk -all |
| Policy | Record (_dmarc.mdm-sdb.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:653640a21c83d@dmarc.centerasecurity.com; sp=quarantine; fo=1; |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves mdm-sdb.dk: no address www.mdm-sdb.dk: no address |
| Wildcard | No |
DNS lookups: 7/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.smtp3.sonderborg.dk | DANE-EE · SPKI · SHA-256 | 3AC2951C4ACE9B1D1E9A7A04889EFF68… |
| 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 | 38 |
| Primary NS (MNAME) | ns1-02.azure-dns.com |
| Responsible (RNAME) | hostmaster@sonderborg.dk |
| Refresh | 900s |
| Retry | 600s |
| Expire | 86400s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2014-02-17 |
| Expires | 2027-02-28 (132d) |
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).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-07-03 00:04:44 shown | 1010ms | 4 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-27 12:03:24 | 723ms | 4 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-27 03:00:52 | 843ms | 4 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-22 04:45:59 | 623ms | 4 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-21 11:17:42 | 1157ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 04:06:16 | 2129ms | 4 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-17 12:13:02 | 3127ms | 4 NS 0 A 1 MX | 🔓 Insecure |