c-centrum.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 93.191.156.249 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by ccentrum-dk0c.mail.protection.outlook.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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns1.simply.com | — | — | — |
| ns2.simply.com | — | — | — |
| ns3.simply.com | — | — | — |
| ns4.simply.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 93.191.156.249 | — | linux336.unoeuro.com | AS48854 | team.blue Denmark A/S | 93.191.152.0/21 | 🇩🇰 Denmark | — |
| TXT Record |
|---|
| brevo-code:c1683f5db130458c5e54ff15919b80ce |
| facebook-domain-verification=5m30h7f0qsqnxz8uum1qw8p538undm |
| MS=ms20229351 |
| Sendinblue-code:c1683f5db130458c5e54ff15919b80ce |
| v=spf1 include:spf.sendinblue.com include:spf.dandomain.dk include:spf.protection.outlook.com include:spf.brevo.com mx ~all |
| Policy | Record (c-centrum.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:spf.sendinblue.com include:spf.dandomain.dk include:spf.protection.outlook.com include:spf.brevo.com mx ~all |
| Policy | Record (_dmarc.c-centrum.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; |
| www | 93.191.156.249 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| 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 | |
| selector1 | selector1-ccentrum-dk0c._domainkey.ccentrum.onmicrosoft.com | 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: 7/10 · policy: ~all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2025070300 |
| 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 |
|---|---|---|---|
| 2026-10-12 14:02:43 | 1117ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-09 08:55:20 | 1022ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-01 04:55:24 | 1377ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-20 03:29:20 | 1798ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 18:45:16 | 647ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 18:40:16 shown | 4681ms | 4 NS 1 A 1 MX | 🔒 Secure |