leadingcourses.dk

📜 Historical scan 2026-06-18 10:09:58 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

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 52.28.183.193 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.

🖥️ Nameservers#

4 records 312ms

Nameserver	IP addresses	PTR	ASN / ISP
ns-1453.awsdns-53.org	205.251.197.173 2600:9000:5305:ad00::1	ns-1453.awsdns-53.org ns-1453.awsdns-53.org	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.
ns-189.awsdns-23.com	205.251.192.189 2600:9000:5300:bd00::1	ns-189.awsdns-23.com ns-189.awsdns-23.com	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.
ns-2004.awsdns-58.co.uk	205.251.199.212 2600:9000:5307:d400::1	ns-2004.awsdns-58.co.uk ns-2004.awsdns-58.co.uk	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.
ns-915.awsdns-50.net	205.251.195.147 2600:9000:5303:9300::1	ns-915.awsdns-50.net ns-915.awsdns-50.net	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.

🌍 A Records#

3 records 322ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
52.28.183.193	300s	ec2-52-28-183-193.eu-central-1.compute.amazonaws.com	AS16509	Amazon.com, Inc.	52.24.0.0/13	🇩🇪 Germany	Frankfurt am Main
52.28.32.166	300s	ec2-52-28-32-166.eu-central-1.compute.amazonaws.com	AS16509	Amazon.com, Inc.	52.24.0.0/13	🇩🇪 Germany	Frankfurt am Main
52.59.118.4	300s	ec2-52-59-118-4.eu-central-1.compute.amazonaws.com	AS16509	Amazon.com, Inc.	52.56.0.0/14	🇩🇪 Germany	Frankfurt am Main

📧 MX Records#

1 records 314ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mail.leadingcourses.com	—	—	—

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	leadingcourses.dk → 52.28.32.166
🔶 Autoconfig	leadingcourses.dk → 52.28.32.166

🔷 AAAA Records (IPv6)#

1 records 205ms

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	—

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

📝

No TXT records found

✉️ SPF#

✗ No SPF record — mail spoofing not restricted

📨 DMARC#

✗ No DMARC record — mail spoofing not restricted

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-08 02:02:59

www CNAME	leadingcourses.dk (all on leadingcourses.dk) → 3.72.114.92 63.184.139.242 63.185.154.74 2a02:348:53:501e::1 (AS16509 AS20857)
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

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

456ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA#

296ms

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

📋 Registration#

WHOIS fetched 2026-10-18 22:05:30

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2012-01-12
Expires	2027-01-31 (102d)

🔗 Same registrant#

0 domains

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

📋 WHOIS#

⏱️ Lookup Timing#

312ms

322ms

314ms

AAAA

205ms

TXT

532ms

CAA

169ms

HTTPS

243ms

TLSA

471ms

SOA

296ms

MTA-STS

318ms

DNSSEC

456ms

SRV

344ms

Total

3845ms

🕐 Scan History#

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	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 shown	3845ms	4 NS 3 A 1 MX	🔓 Insecure