doktor-tjek.dk is a .dk domain served by 2 nameservers (cory.ns.cloudflare.com, rosa.ns.cloudflare.com). It was registered on 1 September 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.70.117 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mail.mikrosec.net. The zone is DNSSEC-signed and validates, has no DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.70.117 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.223.97 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mail.mikrosec.net | 93.167.225.233 | mail.mikrosec.net | AS3292 TDC Holding A/S |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::6815:4675 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3034::ac43:df61 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.70.117,172.67.223.97 ech=AEX+DQBBiQAgACCVlfFu6E/n+EF1NBv8K3dfVWELQcu2tqVj/CQO8MBqTgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:4675,2606:4700:3034::ac43:df61 |
| TXT Record |
|---|
| v=spf1 a ip4:93.167.225.233 mx:mail.mikrosec.net -all |
| Policy | Record (doktor-tjek.dk) |
|---|---|
| -all (hard fail) | v=spf1 a ip4:93.167.225.233 mx:mail.mikrosec.net -all |
| www | 104.21.70.117 172.67.223.97 2606:4700:3030::6815:4675 2606:4700:3034::ac43:df61 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network doktor-tjek.dk: 104.21.70.117 172.67.223.97 2606:4700:3030::6815:4675 2606:4700:3034::ac43:df61 (AS13335) www.doktor-tjek.dk: 104.21.70.117 172.67.223.97 2606:4700:3030::6815:4675 2606:4700:3034::ac43:df61 (AS13335) |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 2/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.doktor-tjek.dk | tUwQE5s3q--OoIvuxfOCiqAMH-GZMZKPZOYcmkFJM-M |
| TXT | _acme-challenge.doktor-tjek.dk | wKjRUHzSNvjDow1VAIYw_CWSpjcnsSHVq9x7sUKvd5s |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2417403111 |
| Primary NS (MNAME) | cory.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2010-09-01 |
| Expires | 2027-09-30 (347d) |
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 |
|---|---|---|---|
| 2026-10-14 00:51:04 shown | 1790ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-07 15:38:03 | 1893ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-23 12:37:30 | 692ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-17 08:49:06 | 834ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-02 17:54:24 | 677ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-27 17:19:38 | 550ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-10 07:40:39 | 2846ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-07 08:19:58 | 1176ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-10 01:32:30 | 2823ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-02 23:36:11 | 2196ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-27 22:04:10 | 1639ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-19 19:01:55 | 574ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-19 09:17:46 | 1236ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-18 13:25:38 | 992ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-17 04:05:10 | 478ms | 2 NS 2 A 1 MX | 🔒 Secure |