coreup.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 29 March 2026 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by smtp.google.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.
| TXT Record |
|---|
| google-site-verification=hFyq-gFoPEl5a2z8vKpa9gNJ4EnY-d5dbbyM6-r6H5Q |
| v=spf1 include:_spf.google.com ~all |
| Policy | Record (coreup.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.google.com ~all |
| Policy | Record (_dmarc.coreup.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:dmarc@coreup.dk |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves coreup.dk: no address www.coreup.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 · ~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: 1/10 · 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 | 2026100300 |
| 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 | 2026-03-29 |
| Expires | 2027-03-28 (159d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 18:13:18 | 620ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-10-04 07:52:58 shown | 639ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-30 07:25:37 | 496ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-27 17:21:05 | 652ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-25 11:49:53 | 625ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-25 03:08:34 | 743ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-26 03:29:21 | 512ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-24 09:20:45 | 921ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-16 22:25:06 | 515ms | 3 NS 0 A 1 MX | 🔒 Secure |