format-4.dk is a .dk domain served by 2 nameservers (rocco.ns.cloudflare.com, sandra.ns.cloudflare.com). It was registered on 19 April 2006 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.30.10 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by .. The zone is not DNSSEC-signed, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 104.21.30.10 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.150.46 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 300s | . Null MX — domain accepts no email (RFC 7505) | |||
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 172.67.150.46 |
| 🔶 Autoconfig | 172.67.150.46 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::ac43:962e | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3032::6815:1e0a | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.30.10,172.67.150.46 ech=AEX+DQBBWwAgACCtgQvq1IBVlr2Cd7NEV4sWCAyxKcVPLti8T/Z1H5x3egAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:962e,2606:4700:3032::6815:1e0a |
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (format-4.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.format-4.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s; |
| www | 104.21.30.10 172.67.150.46 2606:4700:3031::ac43:962e 2606:4700:3032::6815:1e0a (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network format-4.dk: 104.21.30.10 172.67.150.46 2a06:98c1:3120::1 2a06:98c1:3121::1 (AS13335) www.format-4.dk: 104.21.30.10 172.67.150.46 2606:4700:3031::ac43:962e 2606:4700:3032::6815:1e0a (AS13335) |
| Wildcard | Yes: any name under the zone resolves |
DNS lookups: 0/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.format-4.dk | 0snER42F2EZQDrsP9bXesYMeR9Oq_X8Z2Csg1eJHbhY |
| TXT | _acme-challenge.format-4.dk | PbqrokcAoC4dbwvty5kwDsl5GoaVcrPTdJRD-WIN_bs |
| 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 | 2415727734 |
| Primary NS (MNAME) | rocco.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 | 2006-04-19 |
| Expires | 2027-04-30 (192d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-01 07:06:38 | 609ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-25 18:17:47 | 709ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-24 18:05:05 shown | 1906ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-11 20:00:15 | 1271ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-02 09:38:19 | 1230ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-28 14:46:48 | 1486ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-27 12:15:48 | 1883ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-02 00:18:14 | 882ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-17 09:21:06 | 870ms | 2 NS 2 A 0 MX | 🔓 Insecure |