c-olsen.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 9 December 2002 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 81.19.232.44 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by mx1.pub.mailpod11-cph3.one.com, mx2.pub.mailpod11-cph3.one.com and 2 more. 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 81.19.232.44 | 3600s | — | AS47292 | Sentia Denmark A/S | 81.19.224.0/20 | 🇩🇰 Denmark | Albertslund |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 10800s | mx1.pub.mailpod11-cph3.one.com | 104.37.34.230 | mx1.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx2.pub.mailpod11-cph3.one.com | 104.37.34.231 | mx2.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx3.pub.mailpod11-cph3.one.com | 104.37.34.232 | mx3.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx4.pub.mailpod11-cph3.one.com | 104.37.34.233 | mx4.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 81.19.232.44 |
| 🔶 Autoconfig | 81.19.232.44 |
| TXT Record |
|---|
| v=spf1 include:_custspf.one.com ~all |
| Policy | Record (c-olsen.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_custspf.one.com ~all |
| www | 81.19.232.44 (AS47292) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 1/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 068A81EDC98C58D5D494EDF2924D5F50… |
| SMTP _25._tcp.mx1.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| SMTP _25._tcp.mx2.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| SMTP _25._tcp.mx2.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 068A81EDC98C58D5D494EDF2924D5F50… |
| SMTP _25._tcp.mx3.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| SMTP _25._tcp.mx3.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 068A81EDC98C58D5D494EDF2924D5F50… |
| SMTP _25._tcp.mx4.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 00E55642F312E05CDB899B1433EDF47F… |
| SMTP _25._tcp.mx4.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 068A81EDC98C58D5D494EDF2924D5F50… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026070101 |
| 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 | 2002-12-09 |
| Expires | 2026-12-31 (65d) |
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 |
|---|---|---|---|
| 2026-10-19 20:39:08 | 1002ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-03 22:42:49 | 830ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-29 22:25:58 | 610ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-07 08:06:11 | 724ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-26 17:33:32 | 1094ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-20 15:04:05 | 7077ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-04 09:54:26 | 1099ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-27 13:13:30 | 41289ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-03 20:11:54 shown | 6448ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-30 01:20:33 | 960ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-28 19:25:07 | 695ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-26 04:13:03 | 1863ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-25 20:02:37 | 1562ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-20 20:53:51 | 2810ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-16 18:49:41 | 507ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-16 18:40:09 | 670ms | 2 NS 1 A 4 MX | 🔒 Secure |