rkfs.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 6 October 2014 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by rkfs-dk.mail.protection.outlook.com. 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.
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.149.136 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| v=spf1 mx ip4:87.104.84.247 include:_spf.google.com include:spf.protection.outlook.com ~all |
| Policy | Record (rkfs.dk) |
|---|---|
| ~all (soft fail) | v=spf1 mx ip4:87.104.84.247 include:_spf.google.com include:spf.protection.outlook.com ~all |
| Policy | Record (_dmarc.rkfs.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:postmaster@boeggild.dk |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves rkfs.dk: no address www.rkfs.dk: no address |
| 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 |
|---|---|---|
| selector1 | selector1-rkfs-dk._domainkey.randerskristnefriskole.onmicrosoft.com | RSA · ~1024 bit below 2048 bit |
| selector2 | selector2-rkfs-dk._domainkey.randerskristnefriskole.onmicrosoft.com | RSA · ~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 | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2026100100 |
| 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 | Punktum dk A/S (direct) |
| Registered | 2014-10-06 |
| Expires | 2027-10-31 (375d) |
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).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 01:01:09 | 1874ms | 4 NS 0 A 1 MX | 🔒 Secure |
| 2026-10-03 16:08:08 | 967ms | 4 NS 0 A 1 MX | 🔒 Secure |
| 2026-10-02 03:06:21 shown | 4609ms | 4 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-24 00:32:46 | 1056ms | 4 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-28 07:54:11 | 1158ms | 4 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-26 10:05:46 | 1271ms | 4 NS 0 A 1 MX | 🔒 Secure |
| 2026-07-04 12:46:19 | 5339ms | 4 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-22 10:23:20 | 1121ms | 4 NS 0 A 1 MX | ⚠️ Bogus |
| 2026-06-18 07:05:47 | 1046ms | 4 NS 0 A 1 MX | 🔒 Secure |