onlinekurser.dk

Records from scan: 2026-08-26 12:56:53 · 865ms total · last checked 2026-10-17 10:11 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

onlinekurser.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was registered on 3 March 2004 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.104.202.87 is hosted by It Forum Gruppen A/s (AS50346) in Denmark. Mail is handled by onlinekurser-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 57ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.curanet.dk	185.25.141.12 2a02:2339:4006:108::123	ns1.curanet.dk ns1.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.curanet.dk	2a02:2339:1:10f::123:123 91.197.248.75	ns2.curanet.dk ns2.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 56ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
193.104.202.87	3600s	itsecurity.dk	AS50346	It Forum Gruppen A/s	193.104.202.0/24	🇩🇰 Denmark	Hellerup

📧 MX Records#

1 records 53ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	onlinekurser-dk.mail.protection.outlook.com	2a01:111:f403:ca04::2 2a01:111:f403:ca04::a 2a01:111:f403:ca09::3 2a01:111:f403:ca48::8 52.101.73.145 52.101.73.15 52.101.73.30 52.101.73.8	mail-du2pr03cu00102.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-am6pr04cu00303.inbound.protection.outlook.com mail-miypr02cu00100.inbound.protection.outlook.com mail-am6pr02cu00301.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-am7pr05cu00306.inbound.protection.outlook.com mail-am0pr04cu00500.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 → 52.98.154.152
🔶 Autoconfig	94.231.101.82

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 72ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records#

2 records 162ms

TXT Record
MS=ms69860152
v=spf1 a mx ptr include:spf.mandrillapp.com include:smtp2.zitcom.dk include:smtp1.zitcom.dk include:smtp.curanet.dk include:vps156.vpsnix.dk ip4:94.101.217.210 ip4:193.104.202.0/24 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (onlinekurser.dk)
-all (hard fail)	v=spf1 a mx ptr include:spf.mandrillapp.com include:smtp2.zitcom.dk include:smtp1.zitcom.dk include:smtp.curanet.dk include:vps156.vpsnix.dk ip4:94.101.217.210 ip4:193.104.202.0/24 include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.onlinekurser.dk)
p=none (monitor only)	v=DMARC1; p=none

📬 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#

checked 2026-10-09 20:51:07

www	193.104.202.87 (AS50346) (address records, no CNAME)
www vs bare domain	Same network onlinekurser.dk: 193.104.202.87 (AS50346) www.onlinekurser.dk: 193.104.202.87 (AS50346)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 9/10 · policy: -all

warn "ptr" is slow, unreliable and discouraged (RFC 7208 §5.5)
error include:smtp2.zitcom.dk has no SPF record: receivers that reach it return permerror (RFC 7208 §5.2)
error include:smtp1.zitcom.dk has no SPF record: receivers that reach it return permerror (RFC 7208 §5.2)
error include:smtp.curanet.dk has no SPF record: receivers that reach it return permerror (RFC 7208 §5.2)
error include:vps156.vpsnix.dk has no SPF record: receivers that reach it return permerror (RFC 7208 §5.2)
warn 9 of the 10 allowed DNS lookups used: one more include can break SPF
error 4 void lookups (names with no DNS answer): the limit is 2 (RFC 7208 §4.6.4)

🔗 TLSA / DANE#

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

🔐 DNSSEC#

99ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

0ms

Field	Value
Serial	2024020201
Primary NS (MNAME)	ns1.curanet.dk
Responsible (RNAME)	hostmaster@curanet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

WHOIS fetched 2026-10-10 03:52:32

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2004-03-03
Expires	2027-03-31 (164d)

📋 WHOIS#

⏱️ Lookup Timing#

57ms

56ms

53ms

AAAA

44ms

TXT

162ms

CAA

51ms

HTTPS

59ms

TLSA

312ms

SOA

0ms

MTA-STS

67ms

DNSSEC

99ms

SRV

72ms

Total

865ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-08-26 12:56:53 shown	865ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-25 03:26:12	1313ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-28 08:14:50	701ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-23 14:31:07	1001ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-17 20:07:11	1210ms	2 NS 1 A 1 MX	🔒 Secure