c-z.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 94.231.108.221 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mail.protonmail.ch, mailsec.protonmail.ch. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 94.231.108.221 | 600s | linux1.unoeuro.com | AS48854 | team.blue Denmark A/S | 94.231.96.0/20 | 🇩🇰 Denmark | — |
| TXT Record |
|---|
| protonmail-verification=69b5ba93d3a8fd210ca426f9ad8b643850f520ac |
| v=spf1 include:_spf.protonmail.ch include:spf.protection.outlook.com -all |
| Policy | Record (c-z.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_spf.protonmail.ch include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.c-z.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; sp=reject |
| www | NXDOMAIN |
| www vs bare domain | www does not resolve (all like this) |
| 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 |
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 | 2026101200 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 01:22:47 shown | 2135ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-02 06:30:21 | 842ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-30 06:13:33 | 1129ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-28 08:13:16 | 760ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-30 22:59:59 | 762ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-27 19:11:34 | 1338ms | 4 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-25 12:44:41 | 1211ms | 4 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-24 16:31:58 | 4411ms | 4 NS 1 A 3 MX | ⚠️ Bogus |
| 2026-06-22 15:48:36 | 1073ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-21 12:23:41 | 640ms | 4 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-21 12:13:08 | 718ms | 4 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-20 22:38:45 | 684ms | 4 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-16 18:46:22 | 1059ms | 4 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-16 18:40:32 | 926ms | 4 NS 1 A 3 MX | 🔒 Secure |