leadingcourses.dk
Last scanned: 2026-06-23 15:47:36  ·  995ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers4 records   59ms
NameserverIP addressesPTRASN / 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 Records3 records   49ms
IPTTLPTRASNISP / OrgCIDRCountryCity
18.184.9.225 600s ec2-18-184-9-225.eu-central-1.compute.amazonaws.com AS16509 Amazon.com, Inc. 18.176.0.0/12 🇩🇪 Germany Frankfurt am Main
3.123.211.151 600s ec2-3-123-211-151.eu-central-1.compute.amazonaws.com AS16509 Amazon.com, Inc. 3.96.0.0/11 🇩🇪 Germany Frankfurt am Main
3.78.193.200 600s ec2-3-78-193-200.eu-central-1.compute.amazonaws.com AS16509 Amazon.com, Inc. 3.64.0.0/12 🇩🇪 Germany Frankfurt am Main
📧 MX Records1 records   48ms
PriorityTTLMail ServerIP addressesPTRASN
10 600s mail.leadingcourses.com — — —
📧 Autodiscover / Autoconfig
ServiceCNAME / IP
🔷 Autodiscoverleadingcourses.dk → 3.78.193.200
🔶 Autoconfigleadingcourses.dk → 3.78.193.200
🔷 AAAA Records (IPv6)1 records   52ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
2a02:348:53:501e::1 600s — 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
🔏 ACME Challenge
TypeNameValue
CNAME _acme-challenge.leadingcourses.dk leadingcourses.dk
🔗 TLSA / DANE
✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)
🔐 DNSSEC101ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer
🏷️ SOA66ms
FieldValue
Serial1
Primary NS (MNAME)ns-915.awsdns-50.net
Responsible (RNAME)awsdns-hostmaster@amazon.com
Refresh7200s
Retry900s
Expire1209600s
Minimum (neg-cache TTL)86400s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
59ms
A
49ms
MX
48ms
AAAA
52ms
TXT
198ms
CAA
74ms
HTTPS
46ms
TLSA
182ms
SOA
66ms
MTA-STS
89ms
DNSSEC
101ms
SRV
162ms
Total
995ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-06-23 15:47:36 995ms 4 NS 3 A 1 MX 🔓 Insecure View
2026-06-18 10:09:58 3845ms 4 NS 3 A 1 MX 🔓 Insecure View
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