psk.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 3 February 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. On 8 October 2026 we saw it transfer from A/S SCANNET to Simply.com A/S. Mail is handled by mx.simply.com. The zone is not DNSSEC-signed, 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.
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx.simply.com | 94.231.106.20 | mx.simply.com | AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | proest-sejlklub.partner.onboard.blue → 104.26.4.242 |
| 🔶 Autoconfig | maildiscover.simply.com → 94.231.108.222 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 10 | 443 | maildiscover.simply.com |
| TXT Record |
|---|
| proest-sejlklub.partner.onboard.blue |
| Policy | Record (_dmarc.psk.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:dmarc@robot.simply.com; ruf=mailto:dmarc@robot.simply.com; |
| www CNAME | proest-sejlklub.partner.onboard.blue (all on onboard.blue) |
| www vs bare domain | Different networks psk.dk: 94.231.103.100 (AS48854) (all like this)www.psk.dk: 104.26.4.242 104.26.5.242 172.67.70.152 2606:4700:20::681a:4f2 (AS13335) |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u18179280.wl031.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u18179280.wl031.sendgrid.net | 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.
| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.psk.dk | proest-sejlklub.partner.onboard.blue |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | 97A3BA009F39C761BFFB6574340E8138… |
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | A9D603AF4D7ED6B9246B4B68500CD6F2… |
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | 4B949F05A63FED95FC94B3A83DD70167… |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2026101102 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 1999-02-03 |
| Expires | 2027-03-31 (162d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-15 17:31:44 | 1220ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-14 12:42:45 | 788ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-12 10:32:53 shown | 476ms | 3 NS 0 A 1 MX | 🔓 Insecure |
| 2026-10-10 08:59:42 | 674ms | 3 NS 0 A 1 MX | 🔓 Insecure |
| 2026-10-08 05:14:53 | 639ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-03 21:55:54 | 344ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-26 18:53:59 | 542ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-23 16:26:55 | 2798ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-10 06:44:49 | 436ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-27 09:08:37 | 462ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-24 18:39:58 | 678ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-21 14:38:37 | 584ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-08-20 14:29:37 | 1393ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-08-19 11:09:02 | 4241ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-08-15 04:04:21 | 8619ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-14 03:45:14 | 3165ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-29 21:06:22 | 1017ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-25 17:22:00 | 875ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-23 09:17:28 | 781ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-18 04:38:54 | 2210ms | 3 NS 1 A 1 MX | 🔓 Insecure |