mtfu.dk is a .dk domain served by 2 nameservers (jade.ns.cloudflare.com, oswald.ns.cloudflare.com). It was registered on 15 October 2016 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.11.28 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mail.protonmail.ch, mailsec.protonmail.ch. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|---|---|---|---|
| 104.21.11.28 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.165.22 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3032::ac43:a516 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::6815:b1c | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.11.28,172.67.165.22 ech=AEX+DQBBpQAgACCzfTywz893SeqNblrNZkgfc7VfqJ+6U0MtaYQgCkb4WQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::ac43:a516,2606:4700:3037::6815:b1c |
| TXT Record |
|---|
| protonmail-verification=3ec4b56427912fdb822e2643f5e8e765a237ec87 |
| v=DMARC1; p=none |
| v=spf1 include:_spf.protonmail.ch mx ~all |
| Policy | Record (mtfu.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.protonmail.ch mx ~all |
| www | NXDOMAIN |
| www vs bare domain | www does not resolve mtfu.dk: 104.21.11.28 172.67.165.22 2606:4700:3032::ac43:a516 2606:4700:3037::6815:b1c (AS13335) (all like this)www.mtfu.dk: no address |
| Wildcard | No |
DNS lookups: 3/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| 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 | 2416978740 |
| Primary NS (MNAME) | jade.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 | 2016-10-15 |
| Expires | 2035-10-31 (3299d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-10 04:03:40 shown | 2387ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-10-01 01:12:08 | 596ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-29 18:40:43 | 802ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-26 08:43:19 | 963ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-25 08:35:41 | 708ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-08-11 12:13:56 | 4861ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-07-27 21:52:28 | 1114ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-06-27 09:50:51 | 2205ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-06-25 03:54:01 | 3644ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-06-17 14:55:27 | 4650ms | 2 NS 2 A 2 MX | 🔓 Insecure |