atcourse.dk

📜 Historical scan 2026-09-26 17:05:15 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

atcourse.dk is a .dk domain served by 2 nameservers (ns.dandomain.dk, ns2.dandomain.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 217.116.232.209 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by atcourse-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, has no 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.

🖥️ Nameservers#

2 records 45ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.dandomain.dk	185.25.141.3 2a02:2339:4006:109::dd	ns.dandomain.dk ns.dandomain.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.dandomain.dk	2a02:2339:1:108::dd:dd 91.197.248.66	ns2.dandomain.dk ns2.dandomain.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 34ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
217.116.232.209	600s	209.giga-ptr.232.116.217.in-addr.arpa web9.gigahost.dk	AS47292	Sentia Denmark A/S	217.116.224.0/20	🇩🇰 Denmark	—

📧 MX Records#

1 records 36ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	600s	atcourse-dk.mail.protection.outlook.com	2a01:111:f403:ca04::10 2a01:111:f403:ca04::4 2a01:111:f403:ca21::10 2a01:111:f403:ca48::8 52.101.103.137 52.101.209.28 52.101.73.155 52.101.91.21	mail-dbapr03cu00100.inbound.protection.outlook.com mail-db4pr02cu00204.inbound.protection.outlook.com mail-matpr05cu00100.inbound.protection.outlook.com mail-miypr02cu00100.inbound.protection.outlook.com mail-miypr02cu00101.inbound.protection.outlook.com mail-cpjpr05cu00104.inbound.protection.outlook.com mail-am7pr02cu00203.inbound.protection.outlook.com mail-matpr05cu00105.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.56
🔶 Autoconfig	atcourse.dk → 217.116.232.209

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 138ms

TXT Record
MS=ms10085373
v=spf1 mx a include:centex.dk include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (atcourse.dk)
-all (hard fail)	v=spf1 mx a include:centex.dk include:spf.protection.outlook.com -all

📨 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 2026-10-09 11:14:30

www CNAME	atcourse.dk (all on atcourse.dk) → 217.116.232.209 (AS47292)
www vs bare domain	Same network atcourse.dk: 217.116.232.209 (AS47292) www.atcourse.dk: 217.116.232.209 (AS47292)
Wildcard	Yes: any name under the zone resolves

🔎 SPF check#

zone-wide SPF report

DNS lookups: 6/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.atcourse.dk	atcourse.dk

🔗 TLSA / DANE#

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

🔐 DNSSEC#

74ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026083101
Primary NS (MNAME)	ns.dandomain.dk
Responsible (RNAME)	hostmaster@dandomain.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

45ms

34ms

36ms

AAAA

46ms

TXT

138ms

CAA

47ms

HTTPS

38ms

TLSA

373ms

SOA

0ms

MTA-STS

37ms

DNSSEC

74ms

SRV

66ms

Total

1060ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-09 11:14:30	1117ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-26 17:05:15 shown	1060ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-06 00:52:47	1519ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-23 06:45:00	1606ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-19 22:43:27	1038ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-19 22:10:09	1194ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 13:47:37	2632ms	2 NS 1 A 1 MX	🔒 Secure