denn.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 7 June 2002 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by denn-dk.p10.spamhero.com, denn-dk.p20.spamhero.net and 2 more. The zone is DNSSEC-signed and validates, has no 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 | cool.denn.dk → 87.104.84.99 |
| TXT Record |
|---|
| forward-email-port=2525 |
| Sendinblue-code:030b96a1dbbb542b75767091c0b9bc3e |
| v=DMARC1; p=none; sp=none; rua=mailto:dmarc@mailinblue.com!10m; ruf=mailto:dmarc@mailinblue.com!10m; rf=afrf; pct=100; ri=86400 |
| v=spf1 include:spf.sendinblue.com mx ~all |
| Policy | Record (denn.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:spf.sendinblue.com mx ~all |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves denn.dk: no address www.denn.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 |
|---|---|---|
| — | RSA · ~1024 bit below 2048 bit | |
| s1 | s1.domainkey.u13125282.wl033.sendgrid.net | RSA · ~1024 bit below 2048 bit |
| s2 | s2.domainkey.u13125282.wl033.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: 2/10 · 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 | 2022101300 |
| 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 | 2002-06-07 |
| Expires | 2027-07-31 (286d) |
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 |
|---|---|---|---|
| 2026-10-12 14:22:42 | 3154ms | 4 NS 0 A 4 MX | 🔒 Secure |
| 2026-10-09 10:16:55 | 3123ms | 4 NS 0 A 4 MX | 🔒 Secure |
| 2026-10-02 06:16:54 | 1793ms | 4 NS 0 A 4 MX | 🔒 Secure |
| 2026-08-24 14:20:38 shown | 3591ms | 4 NS 0 A 4 MX | 🔒 Secure |
| 2026-06-17 01:56:14 | 3088ms | 4 NS 0 A 4 MX | 🔒 Secure |