flt.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 18 March 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.221.124.121 is hosted by CoMaSys ApS (AS51377) in Denmark. Mail is handled by flt-dk.v-v1.mx.microsoft. The zone is DNSSEC-signed and validates, 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns1.simply.com | — | — | — |
| ns2.simply.com | — | — | — |
| ns3.simply.com | — | — | — |
| ns4.simply.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 193.221.124.121 | — | wp01.comasys.dk | AS51377 | CoMaSys ApS | 193.221.124.0/24 | 🇩🇰 Denmark | — |
| TXT Record |
|---|
| v=spf1 include:spf.protection.outlook.com include:_spf.comasys.dk ~all |
| Policy | Record (flt.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:spf.protection.outlook.com include:_spf.comasys.dk ~all |
| Policy | Record (_dmarc.flt.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; |
| www | 193.221.124.121 (AS51377) (address records, no CNAME) |
| www vs bare domain | Same network |
| 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 |
DNS lookups: 4/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.flt-dk.v-v1.mx.microsoft | DANE-TA · Full cert · SHA-256 | 38D895F5105BC2545822C17A2444F4B0… |
| SMTP _25._tcp.flt-dk.v-v1.mx.microsoft | DANE-TA · Full cert · SHA-256 | 5F88694615E4C61686E106B84C3338C6… |
| SMTP _25._tcp.flt-dk.v-v1.mx.microsoft | DANE-TA · Full cert · SHA-256 | 6EBFF927297A5B3AAF5EAE672252C36A… |
| SMTP _25._tcp.flt-dk.v-v1.mx.microsoft | DANE-EE · SPKI · SHA-256 | 133086C7B822371A4A3304F1661A7880… |
| SMTP _25._tcp.flt-dk.v-v1.mx.microsoft | DANE-EE · SPKI · SHA-256 | A6C267923B26A4A9617EDA73D8DB4FBC… |
| SMTP _25._tcp.flt-dk.v-v1.mx.microsoft | DANE-EE · SPKI · SHA-256 | C495D9E40F7E625BE22F83CC64305182… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2025040704 |
| 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 | 1999-03-18 |
| Expires | 2027-03-31 (165d) |
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 |
|---|---|---|---|
| 2026-10-13 11:33:46 | 446ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 02:59:40 | 899ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 14:44:36 | 796ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-26 20:12:50 | 737ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-24 19:05:21 | 2357ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-24 17:34:43 | 688ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-23 12:01:10 | 894ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 09:52:48 shown | 878ms | 4 NS 1 A 1 MX | 🔒 Secure |