marcusmk.dk is a .dk domain served by 2 nameservers (carioca.ns.cloudflare.com, zeus.ns.cloudflare.com). It was registered on 2 September 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.13.135 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx.simply.com. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.13.135 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.132.224 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mx.simply.com | 94.231.103.108 94.231.106.20 |
mx.simply.com mx.simply.com |
AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔶 Autoconfig | 104.21.13.135 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3037::6815:d87 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::ac43:84e0 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.13.135,172.67.132.224 ech=AEX+DQBBTAAgACCwsNV9gfosRum5G2GyMHjXlt1GKY1Nm3A5OzsBAsosfgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3037::6815:d87,2606:4700:3037::ac43:84e0 |
| TXT Record |
|---|
| v=spf1 include:spf.simply.com -all |
| Policy | Record (marcusmk.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.simply.com -all |
| www | 104.21.13.135 172.67.132.224 2606:4700:3037::6815:d87 2606:4700:3037::ac43:84e0 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network marcusmk.dk: 104.21.13.135 172.67.132.224 2606:4700:3037::6815:d87 2606:4700:3037::ac43:84e0 (AS13335) www.marcusmk.dk: 104.21.13.135 172.67.132.224 2606:4700:3037::6815:d87 2606:4700:3037::ac43:84e0 (AS13335) |
| Wildcard | No |
DNS lookups: 1/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.marcusmk.dk | 3lOhxOZV5y-L6EFnDigL-lWdvHWVw9Bpx-ePEP3iiVQ |
| TXT | _acme-challenge.marcusmk.dk | KFLGXyPD_g7CgEWhFYW04YCoqXz6e1IG_x-JYwSExaY |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | 4B949F05A63FED95FC94B3A83DD70167… |
| 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 | 2417631694 |
| Primary NS (MNAME) | carioca.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2024-09-02 |
| Expires | 2027-09-01 (312d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-18 07:07:38 | 1555ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-10-17 06:33:04 shown | 1588ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-10-17 06:14:26 | 2317ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-10-15 03:33:33 | 2054ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-10-03 17:09:17 | 474ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-30 09:44:05 | 534ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-27 18:55:51 | 725ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-25 18:22:31 | 659ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-17 15:32:55 | 1081ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-07 06:37:50 | 8957ms | 2 NS 2 A 1 MX | ❓ Unknown |
| 2026-06-25 09:27:26 | 820ms | 2 NS 2 A 1 MX | ❓ Unknown |
| 2026-06-24 12:18:02 | 1184ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 11:01:17 | 2357ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-18 04:55:00 | 871ms | 2 NS 2 A 1 MX | 🔓 Insecure |