28721038.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 217.116.232.227 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by 28721038-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, has no 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns01.one.com | — | — | — |
| ns02.one.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 217.116.232.227 | — | 227.giga-ptr.232.116.217.in-addr.arpa | AS47292 | Sentia Denmark A/S | 217.116.224.0/20 | 🇩🇰 Denmark | — |
| TXT Record |
|---|
| MS=ms92105549 |
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (28721038.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| www | Address record (no CNAME) |
| Wildcard | Yes: any name under the zone resolves |
DNS lookups: 1/10 · 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 | 2026030301 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 22:36:28 | 904ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-11 01:52:22 | 1940ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-12 18:37:37 | 1302ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-20 02:49:41 | 1110ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 12:38:53 shown | 715ms | 2 NS 1 A 1 MX | 🔒 Secure |