sigurdsurdej.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 16 January 2015 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 91.221.196.240 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by sigurdsurdej.dk. 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 91.221.196.240 | 600s | — | AS51468 | One.com A/S | 91.221.196.0/23 | 🇩🇰 Denmark | Copenhagen |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 43200s | sigurdsurdej.dk | 91.221.196.240 | — | AS51468 One.com A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | sigurdsurdej.dk → 91.221.196.240 |
| 🔶 Autoconfig | sigurdsurdej.dk → 91.221.196.240 |
| www CNAME | sigurdsurdej.dk (all on sigurdsurdej.dk) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.sigurdsurdej.dk | sigurdsurdej.dk |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026032901 |
| 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 | ONE.COM A/S |
| Registered | 2015-01-16 |
| Expires | 2027-01-31 (99d) |
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 |
|---|---|---|---|
| 2026-10-19 05:02:09 | 1176ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-26 12:40:03 | 2365ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-25 14:16:07 | 715ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-25 14:20:27 | 591ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-24 11:50:00 shown | 32582ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-26 19:18:45 | 634ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-23 16:57:19 | 4091ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-21 16:45:25 | 1158ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 14:29:41 | 2213ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 23:41:49 | 1102ms | 2 NS 1 A 1 MX | 🔒 Secure |