ck.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 25 October 2002 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 76.76.21.142 is hosted by Amazon.com, Inc. (AS16509) in United States. 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 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 |
|---|---|---|---|---|---|---|---|
| 76.76.21.142 | 3600s | — | AS16509 | Amazon.com, Inc. | 76.76.21.0/24 | 🇺🇸 United States | Walnut |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.40 |
| TXT Record |
|---|
| globalsign-domain-verification=nT5Z7ojxk5IUmTQH0dj7tVCKdaq2nbCfTuh3iF-2IA |
| google-site-verification=yw0CiZvfsm_yiNrqKPLdqHXesu-kYcuy0HPRmtHRrV0 |
| MS=ms97224754 |
| v=spf1 mx ip4:217.195.185.10 include:spf.defgo.com include:_spf.centerasecurity.dk a:outbound.centerasecurity.dk -all |
| Policy | Record (ck.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx ip4:217.195.185.10 include:spf.defgo.com include:_spf.centerasecurity.dk a:outbound.centerasecurity.dk -all |
| Policy | Record (_dmarc.ck.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; rua=mailto:6320a2962289d@dmarc.centerasecurity.com; |
| www | 46.30.215.223 2a02:2350:5:108:fc:3c9b:bf5:baae (AS51468) (address records, no CNAME) |
| www vs bare domain | Different networks (all like this) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 4/10 · 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 | 2026092601 |
| 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 | 2002-10-25 |
| Expires | 2026-12-31 (74d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 02:34:17 | 510ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-27 00:31:51 shown | 1017ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-23 23:42:30 | 888ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-13 20:21:32 | 902ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-29 10:58:50 | 1988ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-27 01:13:07 | 753ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-14 05:05:21 | 4653ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-07-26 16:34:26 | 1169ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-07-15 03:13:21 | 1401ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-07-01 22:48:29 | 978ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-27 05:45:30 | 819ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-19 13:35:05 | 2891ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-18 16:39:43 | 3082ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-16 22:24:54 | 65535ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-16 21:10:23 | 579ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-16 21:04:28 | 2928ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-16 21:00:40 | 3022ms | 2 NS 1 A 3 MX | 🔒 Secure |