blue9.dk is a .dk domain served by 4 nameservers (ns1.eurodns.com, ns2.eurodns.com, ns3.eurodns.com and 1 more). It was registered on 12 January 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by fep8.sprawl.dk, relay.inet.tele.dk. 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.eurodns.com | — | — | — |
| ns2.eurodns.com | — | — | — |
| ns3.eurodns.com | — | — | — |
| ns4.eurodns.com | — | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | — | fep8.sprawl.dk | 195.41.53.4 | fep8.sprawl.dk | AS3292 TDC Holding A/S |
| 20 | — | relay.inet.tele.dk | 194.182.148.151 194.182.148.158 |
mail-in2.inet.tele.dk mail-in1.inet.tele.dk |
AS3292 TDC Holding A/S AS3292 TDC Holding A/S |
| TXT Record |
|---|
| v=spf1 include:mail.dk -all |
| Policy | Record (blue9.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:mail.dk -all |
| Policy | Record (_dmarc.blue9.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; sp=reject; fo=1; rua=mailto:cv1zdpyr@ag.eu.dmarcian.com; ruf=mailto:cv1zdpyr@fr.eu.dmarcian.com; |
| www | Exists, no address |
| www vs bare domain | Neither resolves blue9.dk: no address www.blue9.dk: no address |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 2/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2026011427 |
| Primary NS (MNAME) | ns1.eurodns.com |
| Responsible (RNAME) | hostmaster@eurodns.com |
| Refresh | 43200s |
| Retry | 7200s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Eurodns S.A |
| Registered | 1999-01-12 |
| Expires | 2027-03-31 (155d) |
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).
Showing 100 of 631.
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 18:18:02 | 1583ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-10-12 14:30:28 | 2799ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-10-11 14:09:56 | 1019ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-26 04:51:59 | 1783ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-24 04:22:40 | 1938ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-10 15:15:35 | 13615ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-08 03:09:20 | 1892ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-09-04 04:55:35 | 1798ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-08-18 04:58:10 | 5133ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-08-16 23:00:24 | 3685ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-08-02 11:40:55 | 2914ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-07-12 20:53:03 | 1217ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-07-01 19:45:04 | 1978ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-23 04:35:37 | 1249ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-16 15:13:21 | 1659ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-16 15:07:35 | 776ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-16 15:06:14 | 3474ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-16 15:01:16 shown | 2438ms | 4 NS 0 A 2 MX | 🔒 Secure |