healerskolen.dk is a .dk domain served by 2 nameservers (barbara.ns.cloudflare.com, justin.ns.cloudflare.com). It was registered on 24 June 1998 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mx1.onlinemail.io, mx2.onlinemail.io. The zone is not DNSSEC-signed, publishes a DMARC policy and has no IPv6 address. 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.
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mx1.onlinemail.io | 185.21.42.12 | mx1.onlinemail.io | AS48854 team.blue Denmark A/S |
| 20 | 300s | mx2.onlinemail.io | 46.36.208.16 | mx2.onlinemail.io | AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover-mf.onlinemail.io → 185.21.40.62 |
| 🔶 Autoconfig | autoconfig-mf.onlinemail.io → 185.21.40.62 |
| TXT Record |
|---|
| v=spf1 include:spf.onlinemail.io -all |
| Policy | Record (healerskolen.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.onlinemail.io -all |
| Policy | Record (_dmarc.healerskolen.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www | 104.21.42.172 172.67.206.207 2606:4700:3033::6815:2aac 2606:4700:3035::ac43:cecf (AS13335) (address records, no CNAME) |
| www vs bare domain | Only www resolves healerskolen.dk: no address (all like this)www.healerskolen.dk: 104.21.42.172 172.67.206.207 2606:4700:3033::6815:2aac 2606:4700:3035::ac43:cecf (AS13335) |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u3194101.wl102.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u3194101.wl102.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.
DNS lookups: 3/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2413461732 |
| Primary NS (MNAME) | barbara.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 | 1998-06-24 |
| Expires | 2027-06-30 (249d) |
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 |
|---|---|---|---|
| 2026-09-30 17:04:55 shown | 462ms | 2 NS 0 A 2 MX | 🔓 Insecure |
| 2026-09-07 07:39:18 | 976ms | 2 NS 0 A 2 MX | 🔓 Insecure |
| 2026-08-29 19:53:27 | 1184ms | 2 NS 0 A 2 MX | 🔓 Insecure |
| 2026-08-27 23:26:34 | 615ms | 2 NS 0 A 2 MX | 🔓 Insecure |
| 2026-08-27 06:43:43 | 924ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-08 05:57:20 | 1368ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-26 08:11:48 | 3009ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-22 00:39:22 | 857ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 11:04:38 | 777ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 10:58:33 | 607ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 10:58:25 | 1491ms | 3 NS 1 A 1 MX | 🔓 Insecure |