colearning.dk

📜 Historical scan 2026-09-10 23:06:16 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

colearning.dk is a .dk domain served by 3 nameservers (ns.efif.dk, ns2.efif.dk, ns3.efif.dk). It was registered on 6 January 2016 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 195.254.168.52 is hosted by Aarhus Business College (AS51073) in Denmark. Mail is handled by colearning-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 this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

3 records 112ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.efif.dk	195.254.168.23	ns.efif.dk	AS51073 Aarhus Business College
ns2.efif.dk	195.254.168.12	ns2.efif.dk	AS51073 Aarhus Business College
ns3.efif.dk	20.23.170.35	—	AS8075 Microsoft Corporation

🌍 A Records#

1 records 422ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
195.254.168.52	3600s	cphbusiness.dk ek.dk keanet.dk kompetence.kea.dk redirect.efif.dk	AS51073	Aarhus Business College	195.254.168.0/23	🇩🇰 Denmark	Aarhus

📧 MX Records#

1 records 530ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	colearning-dk.mail.protection.outlook.com	2a01:111:f403:ca04::7 2a01:111:f403:ca04::9 2a01:111:f403:ca21::c 2a01:111:f403:ca3c::6 52.101.103.36 52.101.185.21 52.101.68.29 52.101.73.126	mail-db4pr02cu00307.inbound.protection.outlook.com mail-db7pr03cu00601.inbound.protection.outlook.com mail-matpr04cu00204.inbound.protection.outlook.com mail-zrxpr04cu00106.inbound.protection.outlook.com mail-miypr05cu00104.inbound.protection.outlook.com mail-zrxpr05cu00105.inbound.protection.outlook.com mail-dbapr03cu00105.inbound.protection.outlook.com mail-am8pr83cu00106.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 → 52.98.243.56

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

2 records 765ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	10	10	443	webmail.efif.dk
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records#

4 records 715ms

TXT Record
C21851V9y249hD0VP36ppJB4YDTpIR5Y6Uoj94KzZSjhrEHxR6U/fHaq70Cu4ZsHPYOrfGJDlO6o/RmFjq+oZw==
Frederikshavn Handelsskole
MS=ms50916315
v=spf1 redirect=_spf.efif.dk

✉️ SPF#

Policy	Record (colearning.dk)
redirect=_spf.efif.dk	v=spf1 redirect=_spf.efif.dk

📨 DMARC#

Policy	Record (_dmarc.colearning.dk)
p=reject	v=DMARC1; p=reject; pct=100; ruf=mailto:analyze@efif.dk; rua=mailto:64e88d13a948b@dmarc.centerasecurity.com

📬 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 2026-10-16 19:27:49

www CNAME	redirect.efif.dk (all on efif.dk) → 195.254.168.52 (AS51073)
www vs bare domain	Same network colearning.dk: 195.254.168.52 (AS51073) www.colearning.dk: 195.254.168.52 (AS51073)
Wildcard	No
Denial of existence	NSEC3 · 50 iterations · 8-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector2	selector2-colearning-dk._domainkey.efif.onmicrosoft.com	RSA · ~1024 bit below 2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 3/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

175ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2016011022
Primary NS (MNAME)	ns.efif.dk
Responsible (RNAME)	dns-zc@efif.dk
Refresh	14400s
Retry	3600s
Expire	2419200s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-13 15:46:04

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2016-01-06
Expires	2027-01-31 (106d)

🔗 Same registrant#

2 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).

Domain	Registrar
fhavnhs.dk	Punktum dk A/S (direct)
kursuscentretfh.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

112ms

422ms

530ms

AAAA

414ms

TXT

715ms

CAA

401ms

HTTPS

226ms

TLSA

181ms

SOA

0ms

MTA-STS

447ms

DNSSEC

175ms

SRV

765ms

Total

9459ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-16 19:27:49	1795ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-13 15:35:36	1229ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-11 13:49:13	4134ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-06 04:14:26	1217ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-05 04:10:22	4744ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-30 03:19:06	3820ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-27 02:18:32	2168ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-25 01:47:06	807ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-24 06:29:31	2424ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-21 11:41:57	3253ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-18 01:43:21	1376ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-10 23:06:16 shown	9459ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-03 21:31:36	946ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-27 19:47:08	1037ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-24 14:07:38	25616ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-22 08:03:00	7760ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-17 19:23:22	5466ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-10 00:15:38	9123ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-07 17:13:13	2769ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-04 07:01:11	7379ms	3 NS 1 A 1 MX	🔒 Secure
2026-07-24 00:13:41	5049ms	3 NS 1 A 1 MX	🔒 Secure
2026-07-22 20:49:44	5516ms	3 NS 1 A 1 MX	🔒 Secure
2026-07-21 17:36:31	10259ms	3 NS 1 A 1 MX	🔒 Secure
2026-07-20 11:39:02	14815ms	3 NS 1 A 1 MX	🔒 Secure
2026-07-18 08:51:44	19214ms	3 NS 1 A 1 MX	🔒 Secure