office-ltk.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 11 November 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 173.249.20.120 is hosted by Contabo GmbH (AS51167) in France. Mail is handled by mx.office-ltk.dk. 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 173.249.20.120 | 3600s | vmi1512488.contaboserver.net | AS51167 | Contabo GmbH | 173.249.0.0/18 | 🇫🇷 France | Lauterbourg |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx.office-ltk.dk | 173.249.20.120 | vmi1512488.contaboserver.net | AS51167 Contabo GmbH |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 173.249.20.120 |
| 🔶 Autoconfig | 173.249.20.120 |
| TXT Record |
|---|
| v=spf1 a mx ip4:173.249.20.120 ~all |
| Policy | Record (office-ltk.dk) |
|---|---|
| ~all (soft fail) | v=spf1 a mx ip4:173.249.20.120 ~all |
| Policy | Record (_dmarc.office-ltk.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; rua=mailto:admin@office-ltk.dk |
| www | 173.249.20.120 (AS51167) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| default | — | 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: 2/10 · policy: ~all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026092201 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | ONE.COM A/S |
| Registered | 2025-11-11 |
| Expires | 2026-11-10 (21d) |
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 |
|---|---|
| 1tk.dk | ONE.COM A/S |
| adosecurity.dk | Simply.com A/S |
| dk-postnord.dk | Punktum dk A/S (direct) |
| office-realdania.dk | ONE.COM A/S |
| office365-notifications.dk | ONE.COM A/S |
| virksupport.dk | ONE.COM A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 10:42:55 | 570ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-23 19:48:07 shown | 646ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-28 00:09:44 | 908ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-23 10:31:08 | 1480ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-23 19:54:28 | 8450ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-22 21:59:29 | 1029ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 14:22:25 | 1724ms | 2 NS 1 A 1 MX | 🔒 Secure |