rksk.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 17 May 2006 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.223.27.29 is hosted by team.blue Denmark A/S (AS48854) 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 our latest 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 |
|---|---|---|---|---|---|---|---|
| 185.223.27.29 | 3600s | vdom18.net.dk2.zitcom.dk | AS48854 | team.blue Denmark A/S | 185.223.24.0/22 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 193.0.161.5 |
| 🔶 Autoconfig | 185.223.27.29 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:2339:400a:29:: | 3600s | — | AS48854 | team.blue Denmark A/S | 2a02:2339:4000:0:0:0:0:0/34 | 🇩🇰 Denmark | — |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sip._tcp | 0 | 0 | 5060 | ipt-expwaye.rksk.dk |
| _sipfederationtls._tcp | 0 | 10 | 5061 | ipt-expwaye2.rksk.dk |
| _xmpp-client._tcp | 0 | 10 | 5222 | ipt-cmse1.rksk.dk |
| _xmpp-server._tcp | 0 | 0 | 5269 | ipt-expwaye2.rksk.dk |
| TXT Record |
|---|
| amazon-business-verification=45079eecc3b286910b0ffa77c276456f23afe3b9b18fe3faa34ac2f878431641 |
| apple-domain-verification=KEmQCKdhhrcNKqZa |
| apple-domain-verification=xfAjfxTQ8LU6PWJf |
| cisco-ci-domain-verification=3447c5e2992f50f60940c3b1edc4017783e7a7eb8198661a07dbcd12f3896a6c |
| DomainVerification=8YRPX83I1DFTHOQAYO8VBRJ6YXKSY5NFZCI8DW3HUHNKIOI9HFB25AO9XN8VE32Q |
| MS=AE771011C68102296F5080E1B49DCA56FCCB9921 |
| v=spf1 ip4:84.252.78.11 ip4:84.252.78.12 include:_spf.centerasecurity.dk include:spf.protection.outlook.com include:_spf.dbc.dk include:_spf.presscloud.com include:spf.hostnordic.com include:spf.mandrillapp.com include:spf.ubivox.com -all |
| Policy | Record (rksk.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:84.252.78.11 ip4:84.252.78.12 include:_spf.centerasecurity.dk include:spf.protection.outlook.com include:_spf.dbc.dk include:_spf.presscloud.com include:spf.hostnordic.com include:spf.mandrillapp.com include:spf.ubivox.com -all |
| Policy | Record (_dmarc.rksk.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:650b3cc719f4f@dmarc.centerasecurity.com,mailto:dmarc@rksk.dk; ruf=mailto:dmarc-fail@rksk.dk; adkim=r; aspf=r; fo=1 |
| www | 185.223.27.29 2a02:2339:400a:29:: (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network rksk.dk: 185.223.27.29 2a02:2339:400a:29:: (AS48854) www.rksk.dk: 185.223.27.29 2a02:2339:400a:29:: (AS48854) |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| default | — | 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: 9/10 · policy: -all
| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.rksk.dk | _acme-challenge.9ac01310829aae848a5b299bb9e38ac9fdd3e0d949697c77.upcloudlb.com |
| 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 | D4C349E7B72F5CF4A9CEA358F98947C2… |
| SMTP _25._tcp.mx2-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | 56315B43B892E9AEE184919EC6A5821C… |
| 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 | 2026101201 |
| 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 | 2006-05-17 |
| Expires | 2027-05-31 (218d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 16:10:55 shown | 776ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-10-08 10:12:11 | 3687ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-10-07 09:43:47 | 4103ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-28 05:55:19 | 878ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-24 03:07:55 | 1461ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-04 12:08:49 | 949ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-28 02:27:16 | 969ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-27 01:03:13 | 1253ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-21 09:02:03 | 1441ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-08 03:46:10 | 1556ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-07-10 10:18:33 | 3488ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-07-08 14:02:35 | 1191ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-27 00:38:41 | 2547ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-26 18:03:44 | 762ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-17 23:02:05 | 1392ms | 2 NS 1 A 3 MX | 🔒 Secure |