cas.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 31 July 2002 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 109.238.53.235 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by cas-dk.mail.protection.outlook.com, mail02.cas.dk. The zone is DNSSEC-signed and validates, 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns01.one.com | — | — | — |
| ns02.one.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 109.238.53.235 | — | — | AS47292 | Sentia Denmark A/S | 109.238.48.0/21 | 🇩🇰 Denmark | — |
| TXT Record |
|---|
| MS=ms55701581 |
| v=spf1 include:spf.protection.outlook.com include:servers.mcsv.net include:spf.mandrillapp.com a:cas05.cashosting.dk -all |
| Policy | Record (cas.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com include:servers.mcsv.net include:spf.mandrillapp.com a:cas05.cashosting.dk -all |
| www CNAME | cas.dk (all on cas.dk) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| k1 | dkim.mcsv.net | RSA · ~1024 bit below 2048 bit |
| s1 | s1.domainkey.u4549169.wl170.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u4549169.wl170.sendgrid.net | 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: 4/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026061201 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2002-07-31 |
| Expires | 2027-09-30 (346d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 15:49:26 | 2898ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-03 13:01:23 | 1301ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-01 03:46:21 | 925ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-15 08:25:42 | 1621ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-05 19:30:13 | 11203ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-26 10:21:25 | 4699ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-22 07:39:36 | 2219ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-12 07:04:18 | 1362ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-18 23:02:59 | 9047ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-16 13:47:18 | 8975ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-20 16:03:52 | 1427ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-19 14:19:46 | 1385ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-16 21:35:49 shown | 61100ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-16 19:52:07 | 2485ms | 2 NS 1 A 2 MX | ⚠️ Bogus |
| 2026-06-16 19:30:16 | 823ms | 2 NS 1 A 2 MX | 🔒 Secure |