mqtt.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 4 March 2026 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 87.104.248.4 is hosted by EWII Bredbaand A/S (AS204151) in Denmark. The zone is DNSSEC-signed and validates, has no 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 87.104.248.4 | 600s | 87-104-248-4.static.kviknet.net | AS204151 | EWII Bredbaand A/S | 87.104.240.0/20 | 🇩🇰 Denmark | Fredericia |
| www | NXDOMAIN |
| www vs bare domain | www does not resolve (all like this) |
| Wildcard | No |
| 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 |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026100300 |
| 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 | 2026-03-04 |
| Expires | 2027-03-03 (131d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-03 19:08:38 shown | 384ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-29 18:41:29 | 449ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-17 10:45:06 | 770ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-28 04:22:18 | 498ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-06-27 22:29:46 | 480ms | 3 NS 0 A 0 MX | 🔒 Secure |
| 2026-06-17 15:26:55 | 472ms | 3 NS 0 A 0 MX | 🔒 Secure |