openscreen.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 11 January 2011 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 192.38.84.65 is hosted by IDDQD-AS (AS1835) in Denmark. Mail is handled by mx1.spamfilter.cc, mx2.spamfilter.cc and 1 more. 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 | 195.206.121.10 | ns01.one.com | AS197495 One.com A/S |
| ns02.one.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 192.38.84.65 | 43200s | redirector.ait.dtu.dk | AS1835 | IDDQD-AS | 192.38.0.0/17 | 🇩🇰 Denmark | Kongens Lyngby |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | redirector.ait.dtu.dk → 192.38.84.65 |
| 🔶 Autoconfig | redirector.ait.dtu.dk → 192.38.84.65 |
| www CNAME | redirector.ait.dtu.dk (all on dtu.dk) → 192.38.84.65 (AS1835) |
| 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.openscreen.dk | redirector.ait.dtu.dk |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026041201 |
| 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 | 2011-01-11 |
| Expires | 2027-01-31 (106d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-10 07:21:31 | 2309ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-10-06 11:13:46 | 1129ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-30 10:41:25 | 945ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-26 04:47:27 | 1232ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-03 09:35:38 | 3276ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-26 15:46:18 | 1206ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-26 00:00:25 | 1341ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-27 17:30:15 shown | 2604ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-17 13:06:42 | 809ms | 2 NS 1 A 3 MX | 🔒 Secure |