cphopen.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 3 February 2006 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 76.76.21.21 is hosted by Amazon.com, Inc. (AS16509) in United States. Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 5 more. 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns01.one.com | — | — | — |
| ns02.one.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 76.76.21.21 | — | — | AS16509 | Amazon.com, Inc. | 76.76.21.0/24 | 🇺🇸 United States | Walnut |
| TXT Record |
|---|
| google-site-verification=jPEWovvKxyb5Z9F0jW3HediUHK32kWnLp-pSQTJ1Xik |
| v=spf1 mx a include:web.shared.mysmtp.com ~all |
| Policy | Record (cphopen.dk) |
|---|---|
| ~all (soft fail) | v=spf1 mx a include:web.shared.mysmtp.com ~all |
| Policy | Record (_dmarc.cphopen.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:sf@it-magic.dk; |
| www CNAME | cname.vercel-dns.com (all on vercel-dns.com) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 6/10 · 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 | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026032401 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2006-02-03 |
| Expires | 2027-02-28 (131d) |
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 |
|---|---|---|---|
| 2026-10-07 16:12:12 | 534ms | 2 NS 1 A 7 MX | 🔒 Secure |
| 2026-09-25 13:44:29 | 837ms | 2 NS 1 A 7 MX | 🔒 Secure |
| 2026-09-22 02:00:51 | 969ms | 2 NS 1 A 7 MX | 🔒 Secure |
| 2026-08-28 04:14:09 | 1035ms | 2 NS 1 A 7 MX | 🔓 Insecure |
| 2026-08-24 14:32:09 | 1878ms | 2 NS 1 A 7 MX | 🔓 Insecure |
| 2026-06-16 22:45:22 shown | 829ms | 2 NS 1 A 7 MX | 🔓 Insecure |