learnmark.dk is a .dk domain served by 3 nameservers (ns.efif.dk, ns2.efif.dk, ns3.efif.dk). It was registered on 17 January 2011 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 20.126.78.209 is hosted by Microsoft Corporation (AS8075) in The Netherlands. Mail is handled by learnmark-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.
| 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 |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 20.126.78.209 | 3600s | — | AS8075 | Microsoft Corporation | 20.64.0.0/10 | 🇳🇱 The Netherlands | Amsterdam |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.24 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 10 | 443 | webmail.efif.dk |
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| ahrefs-site-verification_6b107e82b7cbf840c1ae3855b5722826a2d1d4aa0ca3d3386039582f7562a313 |
| autodesk-domain-verification=rWWqSseUDxPhp20X-_Im |
| facebook-domain-verification=qgmilcwxuuk5ixudfgii3kxyoovbdd |
| MS=ms86555118 |
| skybrud6311le.azurewebsites.net |
| t+1uFq/vuYZz1aSXYJlsvDIxoKKFA0eBUM3IGNEOgrBzRKKui47Qs18IGiRYUFGUYFgTzH0dmNv7aD+mr5ws6w== |
| v=spf1 include:servers.mcsv.net include:spf.protection.outlook.com include:spf.mailjet.com include:spf.mcb.dk include:_spf.easycruit.com include:mailgun.org ip4:40.68.78.201 ip4:83.91.91.2 -all |
| Policy | Record (learnmark.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:servers.mcsv.net include:spf.protection.outlook.com include:spf.mailjet.com include:spf.mcb.dk include:_spf.easycruit.com include:mailgun.org ip4:40.68.78.201 ip4:83.91.91.2 -all |
| Policy | Record (_dmarc.learnmark.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; pct=100; ruf=mailto:analyze@learnmark.dk; rua=mailto:64e88d13a948b@dmarc.centerasecurity.com |
| www | 20.126.78.209 (AS8075) (address records, no CNAME) |
| www vs bare domain | Same network |
| 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 |
| Selector | CNAME | Key |
|---|---|---|
| k1 | dkim.mcsv.net | RSA · ~1024 bit below 2048 bit |
| s1 | s1.domainkey.u5089797.wl048.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u5089797.wl048.sendgrid.net | RSA · ~1024 bit below 2048 bit |
| selector1 | selector1-learnmark-dk._domainkey.lmhefif.n-v1.dkim.mail.microsoft | RSA · ~2048 bit |
| selector2 | selector2-learnmark-dk._domainkey.lmhefif.n-v1.dkim.mail.microsoft | RSA · ~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.
DNS lookups: 10/10 · policy: -all
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2010072578 |
| Primary NS (MNAME) | ns.efif.dk |
| Responsible (RNAME) | dns-zc@efif.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 2419200s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2011-01-17 |
| Expires | 2032-01-31 (1930d) |
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).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-17 21:54:37 | 2481ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-16 20:38:06 | 1599ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-14 14:07:10 | 4655ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-13 13:40:38 | 1312ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-12 06:50:29 | 3000ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-11 03:48:45 shown | 4692ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-10 02:53:56 | 1404ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-08 20:32:44 | 1800ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-07 20:31:19 | 1465ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-05 18:18:02 | 1640ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-04 18:16:59 | 2093ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 18:07:34 | 760ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 17:57:36 | 1297ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-27 17:10:59 | 1929ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-26 17:03:41 | 2139ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-25 16:55:49 | 1912ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-24 16:43:31 | 2157ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-23 16:29:47 | 2280ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-19 23:43:27 | 6889ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-11 13:46:57 | 3613ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-06 23:38:53 | 1454ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-03 20:38:27 | 1123ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-30 21:47:14 | 805ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-29 18:30:14 | 754ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-28 09:16:09 | 1229ms | 3 NS 1 A 1 MX | 🔒 Secure |