csn.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 6 July 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. We saw it become registrar-handled on 14 October 2026, when it moved from direct registration at Punktum to SAC-IT A/S. Its website address 77.111.240.144 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by mx1-dk.centerasecurity.dk, mx2-dk.centerasecurity.dk and 1 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 |
|---|---|---|---|---|---|---|---|
| 77.111.240.144 | 3600s | webcluster17.webpod11-cph3.one.com | AS51468 | One.com A/S | 77.111.240.0/22 | 🇩🇰 Denmark | Copenhagen |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:2350:5:102:82:c50e:4c86:5ffa | 3600s | — | AS51468 | One.com A/S | 2a02:2350:0:0:0:0:0:0/32 | 🇩🇰 Denmark | Copenhagen |
| TXT Record |
|---|
| v=spf1 include:_custspf.one.com include:_spf.centerasecurity.dk -all |
| Policy | Record (csn.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_custspf.one.com include:_spf.centerasecurity.dk -all |
| Policy | Record (_dmarc.csn.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject |
| www | 77.111.240.144 2a02:2350:5:102:82:c50e:4c86:5ffa (AS51468) (address records, no CNAME) |
| www vs bare domain | Same network csn.dk: 77.111.240.144 2a02:2350:5:102:82:c50e:4c86:5ffa (AS51468) www.csn.dk: 77.111.240.144 2a02:2350:5:102:82:c50e:4c86:5ffa (AS51468) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 2/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | 56315B43B892E9AEE184919EC6A5821C… |
| SMTP _25._tcp.mx1-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | D4C349E7B72F5CF4A9CEA358F98947C2… |
| SMTP _25._tcp.mx2-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | 56315B43B892E9AEE184919EC6A5821C… |
| SMTP _25._tcp.mx2-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | D4C349E7B72F5CF4A9CEA358F98947C2… |
| SMTP _25._tcp.mx3-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | 56315B43B892E9AEE184919EC6A5821C… |
| SMTP _25._tcp.mx3-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | D4C349E7B72F5CF4A9CEA358F98947C2… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026082801 |
| 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 | SAC-IT A/S |
| Registered | 1999-07-06 |
| Expires | 2027-09-30 (347d) |
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 |
|---|---|---|---|
| 2026-10-04 08:12:40 | 3198ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-20 05:44:29 | 2590ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-07 21:13:29 | 1730ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-30 00:19:59 shown | 695ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-27 06:39:54 | 1399ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-24 20:56:27 | 735ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-24 16:15:55 | 850ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-08 21:53:25 | 1215ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-07-03 13:46:14 | 1693ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-25 15:58:10 | 871ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-24 03:04:16 | 918ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-16 23:05:50 | 1048ms | 2 NS 1 A 3 MX | 🔒 Secure |