blueit.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 3 November 2016 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.195.172.36 is hosted by Blue IT Aps (AS42686) in Denmark. Mail is handled by mx3.blueit.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 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 |
|---|---|---|---|---|---|---|---|
| 185.195.172.36 | 43200s | blueit.dk | AS42686 | Blue IT Aps | 185.195.172.0/22 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 28800s | mx3.blueit.dk | 185.195.172.25 | mx3.blueit.dk | AS42686 Blue IT Aps |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 0 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| google-site-verification=Vlh9szoi4kJCkCuj2sRM6yxiXF51-Mepctt1IBh0EPY |
| google-site-verification=WXkWskkth700ID1y8OVr51AW0nIOwpZv5kxYKn6bCv4 |
| MS=ms59669693 |
| v=spf1 mx mx:blueit.dk -all |
| Policy | Record (blueit.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx mx:blueit.dk -all |
| Policy | Record (_dmarc.blueit.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; pct=100; rua=mailto:postmaster@blueit.dk; ruf=mailto:authfail@blueit.dk |
| www CNAME | blueit.dk (all on blueit.dk) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| dkim | — | RSA · ~1024 bit below 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: 2/10 · 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 | 2026092001 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Key-Systems GmbH |
| Registered | 2016-11-03 |
| Expires | 2029-11-30 (1139d) |
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).
| Domain | Registrar |
|---|---|
| blueboks.dk | Key-Systems GmbH |
| bluefi.dk | Key-Systems GmbH |
| bluehosting.dk | Key-Systems GmbH |
| bluephone.dk | Key-Systems GmbH |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-01 07:39:08 shown | 521ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-24 01:15:55 | 545ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-12 17:17:47 | 1092ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-21 14:01:55 | 4594ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-04 22:44:31 | 2325ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-03 13:27:54 | 1185ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-25 06:15:16 | 725ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-15 17:10:49 | 8654ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-25 15:31:46 | 533ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-25 11:57:24 | 872ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 15:04:58 | 476ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 15:04:08 | 1998ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 15:01:39 | 1547ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 15:00:04 | 1918ms | 2 NS 1 A 1 MX | 🔒 Secure |