o1sen.dk is a .dk domain served by 2 nameservers (cleo.ns.cloudflare.com, novalee.ns.cloudflare.com). It was registered on 24 December 2012 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 46.30.215.84 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by mx1.pub.mailpod9-cph3.one.com, mx2.pub.mailpod9-cph3.one.com and 2 more. The zone is DNSSEC-signed and validates, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 46.30.215.84 | 300s | webcluster1.webpod16-cph3.one.com | AS51468 | One.com A/S | 46.30.208.0/21 | 🇩🇰 Denmark | Copenhagen |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mx1.pub.mailpod9-cph3.one.com | 185.164.14.118 | mx1.pub.mailpod9-cph3.one.com | AS51468 One.com A/S |
| 10 | 300s | mx2.pub.mailpod9-cph3.one.com | 185.164.14.119 | mx2.pub.mailpod9-cph3.one.com | AS51468 One.com A/S |
| 10 | 300s | mx3.pub.mailpod9-cph3.one.com | 185.164.14.120 | mx3.pub.mailpod9-cph3.one.com | AS51468 One.com A/S |
| 10 | 300s | mx4.pub.mailpod9-cph3.one.com | 185.164.14.124 | mx4.pub.mailpod9-cph3.one.com | AS51468 One.com A/S |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:2350:5:108:a3:dfaf:eac7:2fd9 | 300s | — | AS51468 | One.com A/S | 2a02:2350:0:0:0:0:0:0/32 | 🇩🇰 Denmark | Copenhagen |
| TXT Record |
|---|
| apple-domain=IScnPYmPy0jklQYQ |
| have-i-been-pwned-verification=9e5e7c528f3eea459d2a12c7fede2b14 |
| v=spf1 include:_custspf.one.com include:_spf.google.com include:_spf.o1sen.dk include:icloud.com -all |
| Policy | Record (o1sen.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_custspf.one.com include:_spf.google.com include:_spf.o1sen.dk include:icloud.com -all |
| Policy | Record (_dmarc.o1sen.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:yg4rnl3t@ag.dmarcian-eu.com; ruf=mailto:yg4rnl3t@fr.dmarcian-eu.com; fo=1; |
| Status | Report address (rua) |
|---|---|
| ✓ Enabled | mailto:yg4rnl3t@tls.eu.dmarcian.com |
| Flags | Tag | Value |
|---|---|---|
| 0 | iodef | mailto:security@o1sen.dk |
| 0 | issue | comodoca.com |
| 0 | issue | digicert.com; cansignhttpexchanges=yes |
| 0 | issue | letsencrypt.org |
| 0 | issue | pki.goog; cansignhttpexchanges=yes |
| 0 | issue | ssl.com |
| 0 | issuewild | comodoca.com |
| 0 | issuewild | digicert.com; cansignhttpexchanges=yes |
| 0 | issuewild | letsencrypt.org |
| 0 | issuewild | pki.goog; cansignhttpexchanges=yes |
| 0 | issuewild | ssl.com |
| www | 46.30.215.84 2a02:2350:5:108:a3:dfaf:eac7:2fd9 (AS51468) (address records, no CNAME) |
| www vs bare domain | Same network o1sen.dk: 46.30.215.84 2a02:2350:5:108:a3:dfaf:eac7:2fd9 (AS51468) www.o1sen.dk: 46.30.215.84 2a02:2350:5:108:a3:dfaf:eac7:2fd9 (AS51468) |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| default | — | 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: 8/10 · policy: -all
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.o1sen.dk | Fneau_uBzHpTQ0x3x4Fs2_yA3pB63NsBS9nIlnwlfFk |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod9-cph3.one.com | DANE-EE · SPKI · SHA-256 | 5D2162F5CED0ACD2C3D63E5582045A6C… |
| SMTP _25._tcp.mx2.pub.mailpod9-cph3.one.com | DANE-EE · SPKI · SHA-256 | 5D2162F5CED0ACD2C3D63E5582045A6C… |
| SMTP _25._tcp.mx3.pub.mailpod9-cph3.one.com | DANE-EE · SPKI · SHA-256 | 5D2162F5CED0ACD2C3D63E5582045A6C… |
| SMTP _25._tcp.mx4.pub.mailpod9-cph3.one.com | DANE-EE · SPKI · SHA-256 | 5D2162F5CED0ACD2C3D63E5582045A6C… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2407791635 |
| Primary NS (MNAME) | cleo.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2012-12-24 |
| Expires | 2026-12-31 (69d) |
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 |
|---|---|---|---|
| 2026-10-21 17:26:42 | 627ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-20 13:46:44 | 4425ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-19 13:22:42 | 2771ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-16 10:38:48 | 668ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-29 17:02:01 | 736ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-28 22:57:17 | 1099ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-26 22:01:20 | 1076ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-25 21:42:39 | 860ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-10 21:09:20 | 2220ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-01 00:44:37 | 1902ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-30 21:02:02 | 1300ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-19 21:19:20 | 1467ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-16 06:55:42 | 5453ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-12 13:51:21 | 9349ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-01 19:46:48 | 1269ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-19 10:46:33 | 1306ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-30 18:16:48 shown | 1696ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-17 19:44:10 | 1250ms | 2 NS 1 A 4 MX | 🔒 Secure |