schjærff.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 15 July 2005 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 87.52.29.26 is hosted by TDC Holding A/S (AS3292) in Denmark. Mail is handled by mail.xn--schjrff-pxa.dk, backup-mx.post.tele.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 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 |
|---|---|---|---|---|---|---|---|
| 87.52.29.26 | 43200s | 87-52-29-26-cable.dk.customer.tdc.net | AS3292 | TDC Holding A/S | 87.48.0.0/13 | 🇩🇰 Denmark | Copenhagen |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 43200s | mail.xn--schjrff-pxa.dk | 87.52.29.26 | 87-52-29-26-cable.dk.customer.tdc.net | AS3292 TDC Holding A/S |
| 20 | 43200s | backup-mx.post.tele.dk | 80.160.77.99 | backup-mx1.post.tele.dk | AS3292 TDC Holding A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | schjaerff.dk → 198.49.23.144 |
| 🔶 Autoconfig | schjaerff.dk → 198.49.23.145 |
| www CNAME | schjaerff.dk (all on schjaerff.dk) |
| www vs bare domain | Different networks schjærff.dk: 87.52.29.26 (AS3292) (all like this)www.schjærff.dk: 198.185.159.144 198.185.159.145 198.49.23.144 198.49.23.145 (AS53831) |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.schjærff.dk | schjaerff.dk |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026101101 |
| 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 | 2005-07-15 |
| Expires | 2027-07-31 (278d) |
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).
| Domain | Registrar |
|---|---|
| schjaerff.dk | Punktum dk A/S (direct) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-25 07:16:40 shown | 1760ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-12 09:23:16 | 1994ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-26 00:06:51 | 652ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-23 23:53:15 | 846ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-12 01:54:45 | 2834ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-18 05:08:21 | 794ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-12 18:15:43 | 1074ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-28 05:10:28 | 3140ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-26 16:00:35 | 682ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-21 05:57:24 | 1147ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-20 20:43:46 | 982ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-19 02:21:26 | 348ms | 0 NS 0 A 0 MX | 🔒 Secure |
| 2026-06-17 12:57:26 | 688ms | 2 NS 1 A 2 MX | 🔒 Secure |