headstrong.dk is a .dk domain served by 2 nameservers (colette.ns.cloudflare.com, yevgen.ns.cloudflare.com). It was registered on 11 September 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.65.80 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 |
|---|---|---|---|---|---|---|---|
| 104.21.65.80 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.189.103 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 172.67.189.103 |
| 🔶 Autoconfig | 172.67.189.103 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3034::ac43:bd67 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::6815:4150 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.65.80,172.67.189.103 ech=AEX+DQBBkQAgACD/xSZdYSRk1bwGi9lVCU3Dmt19KQNI58wpUifL3x8QHgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::ac43:bd67,2606:4700:3035::6815:4150 |
| TXT Record |
|---|
| facebook-domain-verification=xk6ir6qdaaj0628ptjdpu86a097udn |
| google-site-verification=bencko_QmcAHXIbxClIVe8V3-QYf6fRBkpM__umC6tw |
| www | 104.21.65.80 172.67.189.103 2606:4700:3034::ac43:bd67 2606:4700:3035::6815:4150 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network headstrong.dk: 104.21.65.80 172.67.189.103 2606:4700:3034::ac43:bd67 2606:4700:3035::6815:4150 (AS13335) www.headstrong.dk: 104.21.65.80 172.67.189.103 2606:4700:3034::ac43:bd67 2606:4700:3035::6815:4150 (AS13335) |
| Wildcard | Yes: any name under the zone resolves |
| 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 | 2410773100 |
| Primary NS (MNAME) | colette.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | DANDOMAIN A/S |
| Registered | 2020-09-11 |
| 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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 07:45:33 | 452ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-26 15:32:00 | 632ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-18 01:54:29 | 3024ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-16 10:51:19 | 1923ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-26 16:17:11 | 914ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-15 17:06:17 | 4147ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-06 12:44:57 shown | 1177ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-16 14:57:46 | 1095ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-17 11:10:56 | 812ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-17 11:04:56 | 2959ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-17 10:56:44 | 1200ms | 2 NS 2 A 0 MX | 🔓 Insecure |