blue.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was registered on 15 December 2007 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by eu-esec-01.heimdalsecurity.com, eu-esec-02.heimdalsecurity.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.curanet.dk | — | — | — |
| ns2.curanet.dk | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 94.231.106.64 | — | linux5.wannafind.dk | AS48854 | — | — | — | — |
| TXT Record |
|---|
| google-site-verification=Hq06PsCbWVpG0eyxrRz8oJDSAns3FfgQfUU9fq3RwZc |
| MS=ms62121598 |
| v=spf1 mx ip4:40.69.86.130 include:spf.protection.outlook.com include:outbound.mailhop.org include:spf-esec.heimdalsecurity.com ~all |
| Policy | Record (blue.dk) |
|---|---|
| ~all (soft fail) | v=spf1 mx ip4:40.69.86.130 include:spf.protection.outlook.com include:outbound.mailhop.org include:spf-esec.heimdalsecurity.com ~all |
| Policy | Record (_dmarc.blue.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; sp=none; rua=mailto:uhmftqi7@ag.eu.dmarcian.com; |
| www CNAME | blue.dk (all on blue.dk) → 94.231.106.64 (AS48854) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 7/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.eu-esec-01.heimdalsecurity.com | DANE-EE · SPKI · SHA-256 | 2E8933DD6DB99304A5A9D5C4ECDE7B8E… |
| SMTP _25._tcp.eu-esec-02.heimdalsecurity.com | DANE-EE · SPKI · SHA-256 | 2E8933DD6DB99304A5A9D5C4ECDE7B8E… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2024082801 |
| Primary NS (MNAME) | ns1.curanet.dk |
| Responsible (RNAME) | hostmaster@curanet.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2007-12-15 |
| Expires | 2029-12-31 (1171d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 10:30:22 | 1686ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-01 03:50:34 | 391ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-25 03:33:23 | 727ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-31 17:52:32 | 736ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-26 23:52:02 | 1582ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-25 02:25:40 | 24768ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-27 02:24:46 | 739ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-16 15:17:03 shown | 3026ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-16 15:03:56 | 2037ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-16 15:00:44 | 624ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-16 15:00:02 | 737ms | 2 NS 1 A 2 MX | 🔒 Secure |