c-billeder.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 19 May 2004 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 91.221.196.202 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by mail.protonmail.ch, mailsec.protonmail.ch and 1 more. 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns01.one.com | — | — | — |
| ns02.one.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 91.221.196.202 | — | — | AS51468 | One.com A/S | 91.221.196.0/23 | 🇩🇰 Denmark | Copenhagen |
| TXT Record |
|---|
| protonmail-verification=9dc2696ba8136455050ab304c55481d7e3212d82 |
| v=DMARC1; p=none |
| v=spf1 include:_spf.protonmail.ch mx ~all |
| Policy | Record (c-billeder.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.protonmail.ch mx ~all |
| Policy | Record (_dmarc.c-billeder.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none |
| www | 91.221.196.202 (AS51468) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| c-billeder.dk | RSA Invalid key data — receivers can't verify signatures |
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| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026061301 |
| 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 | 2004-05-19 |
| Expires | 2027-05-31 (224d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-14 05:11:04 | 545ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-30 18:16:11 | 711ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-23 21:22:49 | 810ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-17 18:18:52 | 1795ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-01 09:52:20 | 830ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-26 11:16:24 | 863ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-15 02:14:33 | 2088ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-07-17 01:22:01 | 10204ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-07-12 13:43:38 | 10948ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-28 04:29:42 | 2826ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-16 18:50:09 | 767ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-16 18:40:35 shown | 742ms | 2 NS 1 A 3 MX | 🔒 Secure |