cortexgruppen.dk is a .dk domain served by 5 nameservers (ns1.gigahost.dk, ns2.gigahost.dk, ns3.gigahost.dk and 2 more). It was registered on 15 November 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 23.102.28.49 is hosted by Microsoft Corporation (AS8075) in Ireland. Mail is handled by cortexgruppen-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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 23.102.28.49 | 3600s | — | AS8075 | Microsoft Corporation | 23.102.0.0/16 | 🇮🇪 Ireland | Dublin |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.40 |
| 🔶 Autoconfig | cortexgruppen.dk → 23.102.28.49 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 1 | 100 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| MS=ms47918337 |
| v=spf1 include:spf.protection.outlook.com include:spf.smtp2go.com -all |
| Policy | Record (cortexgruppen.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com include:spf.smtp2go.com -all |
| www CNAME | cortexgruppen.dk (all on cortexgruppen.dk) → 23.102.28.49 (AS8075) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-cortexgruppen-dk._domainkey.fasadgruppen.onmicrosoft.com | 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: 2/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.cortexgruppen.dk | cortexgruppen.dk |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026100101 |
| Primary NS (MNAME) | ns1.gigahost.dk |
| Responsible (RNAME) | hostmaster@cortexgruppen.dk |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | GIGAHOST ApS |
| Registered | 2020-11-15 |
| Expires | 2026-11-30 (38d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-22 20:12:23 | 1940ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-15 22:10:08 | 1767ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-08 08:07:40 | 3257ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-01 03:15:34 shown | 1161ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-30 03:08:21 | 1142ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-24 21:18:10 | 1120ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-21 22:48:34 | 1537ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-11 17:08:41 | 1552ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-04 12:37:26 | 931ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 16:25:38 | 898ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-26 16:18:10 | 1752ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-20 11:44:55 | 3158ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-14 09:45:32 | 5637ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-07 04:32:59 | 2201ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-04 09:12:58 | 10505ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-23 09:47:45 | 1601ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-16 16:37:09 | 1226ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-11 10:54:46 | 3211ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-03 17:37:59 | 1742ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-26 03:08:16 | 1216ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-20 05:44:57 | 2954ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-16 22:35:31 | 1816ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-16 22:30:39 | 2773ms | 5 NS 1 A 1 MX | 🔓 Insecure |