ao.dk is a .dk domain served by 2 nameservers (kiki.ns.cloudflare.com, mitch.ns.cloudflare.com). It was registered on 31 January 1997 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 5.44.137.42 is hosted by TDC Holding A/S (AS3292) in Denmark. Mail is handled by ao-dk.mail.protection.outlook.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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 5.44.137.42 | 300s | — | AS3292 | TDC Holding A/S | 5.44.136.0/21 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.24 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| _qaesvu337vdaln77aiegak0wachbjny |
| 00D4L000000GZl1=1TBTl00000002xt |
| apple-domain-verification=JXtkxS_GQXqS6M7CHHND8cFXxHvwvLsbH9wDI5yyCiA |
| apple-domain-verification=qInTGBakzLED6Yd8 |
| atlassian-domain-verification=nf5a3RajeuvrQGwKWzgZUBxvnnO5E2wIgIYLgt0JoHgmFJYcIsx22IPpWBVi44sd |
| barco-verification=7febdd83-9e45-55d4-b232-bf06bcbf809f |
| bw=Ndtdl6eKKGzIuqGm2REy0kEc//rCZ9w45otItcUoJXZb |
| exRyI+OWH/Qd9oJmXci29HVMVf+PLzf1IA7JHSwOJl4= |
| globalsign-domain-verification=KnscwkaYTkRHf8PLiITbpTA9hgu-f9MvIHmCEbk7rG |
| have-i-been-pwned-verification=4dabddcc4b547630b2f17395e3d0c2c2 |
| infor-cloudsuite-domain-verification=G2ZMEURQWY2LEXFX8VMJ75ARHBVUVKNJSA7S8V978SKHQGDWPZK4FVVCNH2HCNS9 |
| make-domain-verification=fd984a45-38d6-44c5-b66d-10fbc669a0bc |
| MS=ms95910679 |
| openai-domain-verification=dv-5QMGQyMiUnE5HflqWit7NWa2 |
| pIHsfjExHxnBke0qI7JrqZXFjA983nfNbAvEmC4ulf/IG0f57zUXCGyTRe6PaqMtE1MCc8eIlIvOIpUXq26f4g== |
| teamviewer-sso-verification=d7cf5880ac99457691e1931c64ccb13c |
| v=spf1 include:_u.ao.dk._spf.smart.ondmarc.com include:spf.protection.outlook.com ~all |
| Policy | Record (ao.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_u.ao.dk._spf.smart.ondmarc.com include:spf.protection.outlook.com ~all |
| Policy | Record (_dmarc.ao.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; pct=100; sp=reject; rua=mailto:998a73ca@inbox.ondmarc.com; ruf=mailto:998a73ca@inbox.ondmarc.com; adkim=r; aspf=r; fo=0; rf=afrf; ri=3600 |
| Check | Result |
|---|---|
| Status | 🔒 Enforce |
| TXT record (_mta-sts) | ✓ Found |
| HTTPS policy | ✓ Valid |
| Mode | enforce |
| Policy ID | 1678449302257 |
| max_age | 1209600s |
| Policy MX | ao-dk.mail.protection.outlook.com |
| Status | Report address (rua) |
|---|---|
| ✓ Enabled | mailto:998a73ca@inbox.ondmarc.com |
| www CNAME | ao.dk (all on ao.dk) → 5.44.137.42 (AS3292) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-ao-dk._domainkey.aojohansen.onmicrosoft.com | RSA · ~2048 bit |
| selector2 | selector2-ao-dk._domainkey.aojohansen.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: 13/10 · policy: ~all
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.ao.dk | 4OdblsyMTmLUjX3yc92YQ8cFfSZaxVFieXF_94NWTrY |
| TXT | _acme-challenge.ao.dk | mbbCUBEZWa4MARu_5SzuOVGrI_8qjL5HV1utXo |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2417544888 |
| Primary NS (MNAME) | kiki.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 1997-01-31 |
| Expires | 2027-03-31 (159d) |
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).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-22 17:11:16 | 1025ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-21 03:34:59 | 1663ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-17 21:28:46 | 2494ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-15 18:56:17 shown | 4920ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-12 14:31:50 | 2788ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-10 10:22:51 | 2285ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-09 02:53:40 | 4840ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-06 19:35:35 | 4856ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-29 18:40:03 | 4959ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-26 01:53:44 | 1165ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-25 16:57:04 | 2370ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-24 16:35:45 | 2690ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-23 15:40:12 | 1486ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-21 03:20:02 | 3482ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-15 07:33:15 | 8132ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-08 06:00:22 | 2069ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-31 04:02:39 | 2577ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-11 14:09:00 | 8495ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-09 07:06:09 | 5414ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-18 04:42:24 | 5359ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-16 14:21:36 | 9116ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-13 21:43:58 | 1543ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-10 16:34:12 | 4685ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-08 22:57:44 | 2685ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-07 16:22:19 | 3750ms | 2 NS 1 A 1 MX | 🔒 Secure |