kortermann-it.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.40.65 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by kortermannit-dk02e.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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 185.21.40.65 | 300s | linux20.curanet.dk | AS48854 | team.blue Denmark A/S | 185.21.40.0/22 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.40 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sip._tcp | 0 | 0 | 443 | sipdir.online.lync.com |
| _sipfederationtls._tcp | 0 | 0 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| ahrefs-site-verification_6fbd38299dfc20e7806db3a34fe02b35a0919907b139b3fb29f73b8b90048b4c |
| bw=htqsFKTY9kPi8NxRDhLZZ32eJabe9XkGC+xeB7rYJT7k |
| FOxJx0lmah6uSxdojiTEtgwNxdjTNpkFiVQ/gdf6kzY= |
| google-site-verification=Ud-sz-xC8pQ2DWS5GIlg0b--Uaoj57H_fdVr5SSDNaQ |
| v=spf1 +a +mx include:spfinclude.sikkermail.dk include:spf.protection.outlook.com include:spf.securesmtp.dk include:servers.mcsv.net ip4:94.231.105.150 -all |
| Policy | Record (kortermann-it.dk) |
|---|---|
| -all (hard fail) | v=spf1 +a +mx include:spfinclude.sikkermail.dk include:spf.protection.outlook.com include:spf.securesmtp.dk include:servers.mcsv.net ip4:94.231.105.150 -all |
| Policy | Record (_dmarc.kortermann-it.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:683056edcfa2e@dmarc-dk.centerasecurity.com; |
| www | 185.21.40.65 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-kortermannit-dk02e._domainkey.kortermann.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.
DNS lookups: 6/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.kortermann-it.dk | c7c0d82b-6c7e-425c-8568-c2aa2f8a447c.c-699b.tx.auth.certifytheweb.com |
| TXT | c7c0d82b-6c7e-425c-8568-c2aa2f8a447c.c-699b.tx.auth.certifytheweb.com | 1i139IHt3Noht1skKwQH_M2y34tefFvZASmqxf--Zyg |
| TXT | c7c0d82b-6c7e-425c-8568-c2aa2f8a447c.c-699b.tx.auth.certifytheweb.com | rtKb0mvnbI9Be0W1UAm14j7-DDlYqIarmUCa4Swfr0Y |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026060201 |
| Primary NS (MNAME) | ns1.curanet.dk |
| Responsible (RNAME) | hostmaster@curanet.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-08 16:48:24 shown | 1571ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-01 09:18:32 | 1404ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-27 02:36:40 | 2030ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-26 18:50:58 | 1675ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-21 18:06:32 | 3596ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-20 22:21:27 | 1148ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 13:20:22 | 4941ms | 2 NS 1 A 1 MX | 🔒 Secure |