ac-heiberg.dk is a .dk domain served by 4 nameservers (ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com and 1 more). It was registered on 19 July 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 149.28.175.58 is hosted by The Constant Company, LLC (AS20473) in Australia. Mail is handled by acheiberg-dk0e.mail.protection.outlook.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 |
|---|---|---|---|---|---|---|---|
| 149.28.175.58 | 3600s | 149.28.175.58.vultrusercontent.com | AS20473 | The Constant Company, LLC | 149.28.128.0/17 | 🇦🇺 Australia | Sydney |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.154.136 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| mscid=K5taZdex2R0KAE9ZImGeqJ6kwg/Gv2ypSV8iCTAbQ32KUwS6YKLyGyZBUARksJIEkMMTf6KKY8TKAzJ3wtHVlg== |
| v=spf1 include:spf.protection.outlook.com include:_spf.elasticemail.com -all |
| Policy | Record (ac-heiberg.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com include:_spf.elasticemail.com -all |
| Policy | Record (_dmarc.ac-heiberg.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www | 149.28.175.58 (AS20473) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 3/10 · 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 | 1 |
| Primary NS (MNAME) | ns1.bdm.microsoftonline.com |
| Responsible (RNAME) | azuredns-hostmaster@microsoft.com |
| Refresh | 3600s |
| Retry | 300s |
| Expire | 2419200s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2010-07-19 |
| Expires | 2027-07-31 (287d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 13:37:10 shown | 2078ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-16 17:44:24 | 3711ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-24 02:29:14 | 5283ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-22 06:32:14 | 1170ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-21 03:16:36 | 2597ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-16 12:42:36 | 823ms | 4 NS 1 A 1 MX | 🔓 Insecure |