21bit.dk is a .dk domain served by 2 nameservers (sandra.ns.cloudflare.com, vicente.ns.cloudflare.com). It was registered on 7 January 2026 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.59.182 is hosted by Cloudflare, Inc. (AS13335). The zone is not DNSSEC-signed, has no DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.59.182 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.182.64 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::ac43:b640 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3033::6815:3bb6 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.59.182,172.67.182.64 ech=AEX+DQBBrAAgACAvQe/2yNFntQmFqE9JRpDNmK4ItovIcqJ9LM87j5hiDwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:b640,2606:4700:3033::6815:3bb6 |
| www | 104.21.22.148 172.67.205.86 2606:4700:3030::6815:1694 2606:4700:3033::ac43:cd56 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.21bit.dk | A8pb7SElWyl6q439WVlTaFedIF67jm9So47UeHO2w7Q |
| TXT | _acme-challenge.21bit.dk | jb-R3TWEypCALwezWN01iTq3cRRrRZud5vwt-btUvvE |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2412758291 |
| Primary NS (MNAME) | sandra.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Dynadot LLC |
| Registered | 2026-01-07 |
| Expires | 2027-01-06 (80d) |
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 |
|---|---|---|---|
| 2026-10-17 00:13:43 | 616ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-07 07:46:09 | 1206ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-01 04:57:41 | 576ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-29 19:49:22 | 403ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-28 09:07:50 | 512ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-15 05:03:15 | 1259ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-11 02:46:58 | 1973ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-04 00:50:31 | 10009ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-23 02:54:54 | 1499ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-22 02:37:46 shown | 5246ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-08 19:16:08 | 8991ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-02 18:02:06 | 1638ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-20 02:28:00 | 2540ms | 2 NS 2 A 0 MX | ⚠️ Bogus |
| 2026-06-19 16:12:55 | 1503ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-16 12:40:34 | 497ms | 2 NS 2 A 0 MX | 🔓 Insecure |