leadingcourses.dk is a .dk domain served by 4 nameservers (ns-1453.awsdns-53.org, ns-189.awsdns-23.com, ns-2004.awsdns-58.co.uk and 1 more). It was registered on 12 January 2012 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 3.75.129.155 is hosted by Amazon.com, Inc. (AS16509) in Germany. Mail is handled by mail.leadingcourses.com. The zone is not DNSSEC-signed, has no DMARC policy and is reachable over IPv6. 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.
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mail.leadingcourses.com | — | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | leadingcourses.dk → 3.75.129.155 |
| 🔶 Autoconfig | leadingcourses.dk → 3.75.129.155 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:348:53:501e::1 | 300s | — | AS20857 | Signet B.V. | 2a02:348:40:0:0:0:0:0/42 | 🇳🇱 The Netherlands | — |
| www CNAME | leadingcourses.dk (all on leadingcourses.dk) |
| www vs bare domain | Same network leadingcourses.dk: 3.72.114.92 63.184.139.242 63.185.154.74 2a02:348:53:501e::1 (AS16509 AS20857) www.leadingcourses.dk: 3.72.114.92 63.184.139.242 63.185.154.74 2a02:348:53:501e::1 (AS16509 AS20857) |
| Wildcard | Yes: any name under the zone resolves |
| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.leadingcourses.dk | leadingcourses.dk |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 1 |
| Primary NS (MNAME) | ns-915.awsdns-50.net |
| Responsible (RNAME) | awsdns-hostmaster@amazon.com |
| Refresh | 7200s |
| Retry | 900s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2012-01-12 |
| Expires | 2027-01-31 (103d) |
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 |
|---|---|---|---|
| 2026-09-29 23:10:33 | 3184ms | 4 NS 3 A 1 MX | 🔓 Insecure |
| 2026-09-15 16:09:06 shown | 3529ms | 4 NS 3 A 1 MX | 🔓 Insecure |
| 2026-09-06 08:46:37 | 12798ms | 4 NS 3 A 1 MX | 🔓 Insecure |
| 2026-06-23 15:47:36 | 995ms | 4 NS 3 A 1 MX | 🔓 Insecure |
| 2026-06-18 10:09:58 | 3845ms | 4 NS 3 A 1 MX | 🔓 Insecure |