u21em.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 26 May 2009 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 46.30.211.38 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by .. The zone is DNSSEC-signed but currently fails validation, 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 46.30.211.38 | 600s | domain-parking.one.com | AS51468 | One.com A/S | 46.30.208.0/21 | 🇩🇰 Denmark | Copenhagen |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 600s | . Null MX — domain accepts no email (RFC 7505) | |||
| Check | Result |
|---|---|
| Validation Status | ⚠️ Bogus |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: insecurity proof failed |
| Field | Value |
|---|---|
| Serial | 2026060901 |
| 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 | Punktum dk A/S (direct) |
| Registered | 2009-05-26 |
| Expires | 2027-05-31 (237d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-14 13:19:25 | 651ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-27 18:31:20 | 547ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-25 18:14:12 | 460ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-10 11:31:30 | 2697ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-10 16:13:07 | 8529ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-04 16:55:55 | 604ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-22 01:10:33 shown | 476ms | 2 NS 1 A 1 MX | ⚠️ Bogus |
| 2026-06-18 04:25:45 | 443ms | 2 NS 1 A 0 MX | 🔒 Secure |