blu.dk is a .dk domain served by 2 nameservers (opal.ns.cloudflare.com, watson.ns.cloudflare.com). It was registered on 21 February 2001 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 209.250.251.11 is hosted by The Constant Company, LLC (AS20473) in The Netherlands. Mail is handled by mxa-001e4201.gslb.pphosted.com, mxb-001e4201.gslb.pphosted.com. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|---|---|---|---|
| 209.250.251.11 | 3600s | bludk.tempurl.host | AS20473 | The Constant Company, LLC | 209.250.224.0/19 | 🇳🇱 The Netherlands | Amsterdam |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mxa-001e4201.gslb.pphosted.com | 185.132.182.150 | mx07-001e4201.pphosted.com | AS52129 Proofpoint, Inc. |
| 10 | 3600s | mxb-001e4201.gslb.pphosted.com | 91.207.212.139 | mx08-001e4201.pphosted.com | AS52129 Proofpoint, Inc. |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.149.136 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| adobe-idp-site-verification=46503cd5-f9fd-43c4-827a-e02b7b9719d0 |
| apple-domain-verification=KUFFsITJ4xotIvE4 |
| cisco-ci-domain-verification=5e1b7787109dd8d3d754ae4c7c7c1b1115d24dfbfde2e0d2da5d9173a7499b76 |
| cZ2bso5XczCCnRTSXv7oMPOLEJAsToFTVgt8lf2dAKwEymoy8pzNEcy1kVU0kQ+LfqkuwdQt35yXw4QigAwopw== |
| docusign=ce831b3b-3d2a-4b02-862a-5d5c9724f34f |
| elevenlabs=JJXkwk0gqOZqtmDWbKL0cEkTDyrylW8XxMsoWBJTyAM |
| google-gws-recovery-domain-verification=65731984 |
| google-site-verification=rLxn-Or6rqA1_zjMwm7Ilat6c_esUJ3Q7fFy2T3fQns |
| knowbe4-site-verification=38dbaf2e21e369029101cf35fb5be340 |
| MS=ms14343046 |
| openai-domain-verification=dv-BQgUr834pKI1vMh4n3qYmZeg |
| perplexity-ai-domain-verification-33k62v=7BLjQwM3bYLpgTp0FMPWBe3vp |
| teamtailor=8b575051b479920a20c4c4ce64d062c7 |
| v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all |
| Policy | Record (blu.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all |
| Policy | Record (_dmarc.blu.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com |
| www CNAME | blu.dk (all on blu.dk) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 1/10 · policy: ~all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2416940443 |
| Primary NS (MNAME) | opal.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | CSC Digital Brand Service, Inc |
| Registered | 2001-02-21 |
| Expires | 2027-03-31 (165d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 16:20:16 shown | 2174ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-30 14:19:33 | 1288ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-29 18:22:35 | 1250ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-15 11:28:40 | 1674ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-09 16:43:59 | 1648ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-13 02:34:30 | 1840ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-07-18 04:26:58 | 10674ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-07-03 03:08:39 | 1662ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-28 03:08:34 | 1449ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-21 19:34:43 | 1477ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-16 15:15:23 | 5140ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-16 15:08:08 | 1970ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-16 15:04:06 | 998ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-16 15:00:30 | 2743ms | 2 NS 1 A 2 MX | 🔓 Insecure |