4j.dk is a .dk domain served by 2 nameservers (brenda.ns.cloudflare.com, randy.ns.cloudflare.com). It was registered on 4 September 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.69.38 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mail.4j.dk. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.69.38 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.204.19 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 120s | mail.4j.dk | 91.107.194.126 | static.126.194.107.91.clients.your-server.de | AS24940 Hetzner Online GmbH |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::6815:4526 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::ac43:cc13 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.69.38,172.67.204.19 ech=AEX+DQBBXQAgACD4tluV7+N6egP3rjc95AhG8H8rAWHDx+Y5v46cYnx6AwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:4526,2606:4700:3037::ac43:cc13 |
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (4j.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| www | 188.114.96.1 188.114.97.1 2606:4700:3031::6815:4526 2606:4700:3037::ac43:cc13 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 0/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.4j.dk | FlpsfLLTqeTwfocSz3zi-7iDlk8rGw3sIbmEl0z_blQ |
| TXT | _acme-challenge.4j.dk | TLmq52CnswG-ZqiCHr-b1e9xTMfTtdDRFyvcM4bujqY |
| 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 | 2413345046 |
| Primary NS (MNAME) | brenda.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 | 2023-09-04 |
| Expires | 2027-09-03 (321d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-01 17:12:17 | 808ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-30 17:08:56 | 880ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-30 07:58:53 | 2074ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-28 06:18:07 shown | 695ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-03 05:54:14 | 8918ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-23 15:07:58 | 928ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-27 06:47:07 | 817ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-16 12:39:25 | 2580ms | 2 NS 2 A 1 MX | 🔓 Insecure |