polarhus.dk is a .dk domain served by 2 nameservers (april.ns.cloudflare.com, owen.ns.cloudflare.com). It was registered on 11 July 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.61.138 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by polarhus-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.61.138 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.210.247 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.149.152 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::ac43:d2f7 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3036::6815:3d8a | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.61.138,172.67.210.247 ech=AEX+DQBBGgAgACDXtcrNIgCrUouNh2NzXiayHDq57GWhVUm3+1b57TVAFQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:d2f7,2606:4700:3036::6815:3d8a |
| TXT Record |
|---|
| google-site-verification=X_Jejy7wMB0ku-jHi-DSzIdSxFJ7Yp00nIc3KumE6yM |
| knowbe4-site-verification=b8e8f692e035ecb21314ccdb79242e42 |
| MS=ms59215795 |
| v=spf1 include:143522491.spf02.hubspotemail.net include:spf.protection.outlook.com include:_spf.mailersend.net include:_spf.mlsend.com include:_spf.google.com -all |
| Policy | Record (polarhus.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:143522491.spf02.hubspotemail.net include:spf.protection.outlook.com include:_spf.mailersend.net include:_spf.mlsend.com include:_spf.google.com -all |
| Policy | Record (_dmarc.polarhus.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:dmarc@polhus.com; ruf=mailto:dmarc@polhus.com; fo=1 |
| www | 104.21.61.138 172.67.210.247 2606:4700:3030::ac43:d2f7 2606:4700:3036::6815:3d8a (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network polarhus.dk: 104.21.61.138 172.67.210.247 2606:4700:3030::ac43:d2f7 2606:4700:3036::6815:3d8a (AS13335) www.polarhus.dk: 104.21.61.138 172.67.210.247 2606:4700:3030::ac43:d2f7 2606:4700:3036::6815:3d8a (AS13335) |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Delete signal: the zone asks the registry to remove its DS (go insecure) 1 CDS, 1 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-polarhus-dk._domainkey.azgartenhausgmbh.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: 5/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2416508508 |
| Primary NS (MNAME) | april.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Abion AB |
| Registered | 2019-07-11 |
| Expires | 2027-07-31 (286d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-04 09:13:49 shown | 1113ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-22 19:43:19 | 1245ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-19 05:41:26 | 1985ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-10 21:17:58 | 5275ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-07 11:04:37 | 1930ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-17 09:26:23 | 4907ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-24 03:31:13 | 1573ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-23 03:15:44 | 1425ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-09 06:24:34 | 1658ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-29 16:47:42 | 997ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-20 16:38:57 | 741ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-18 07:12:21 | 1114ms | 2 NS 2 A 1 MX | 🔓 Insecure |