mathk.dk is a .dk domain served by 2 nameservers (kami.ns.cloudflare.com, sid.ns.cloudflare.com). It was registered on 29 November 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.43.18 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx1.hostinger.com, mx2.hostinger.com. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.43.18 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.215.218 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 5 | 18000s | mx1.hostinger.com | 172.65.182.103 2606:4700:90:0:c1f8:f874:2386:b61f |
— — |
AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. |
| 10 | 18000s | mx2.hostinger.com | 172.65.182.103 2606:4700:90:0:c1f8:f874:2386:b61f |
— — |
AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.mail.hostinger.com → 34.120.251.119 |
| 🔶 Autoconfig | autoconfig.mail.hostinger.com → 34.120.251.119 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3032::ac43:d7da | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::6815:2b12 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.43.18,172.67.215.218 ech=AEX+DQBBvAAgACAO3unMAto2NEMjstTmWw8B+4FfoNC7pAFUfu/9Q6wwIwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::ac43:d7da,2606:4700:3037::6815:2b12 |
| TXT Record |
|---|
| v=spf1 include:_spf.mail.hostinger.com ~all |
| Policy | Record (mathk.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.mail.hostinger.com ~all |
| Policy | Record (_dmarc.mathk.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none |
| www | 104.21.43.18 172.67.215.218 2606:4700:3032::ac43:d7da 2606:4700:3037::6815:2b12 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 3/10 · policy: ~all
No problems found| 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 | 2412286010 |
| Primary NS (MNAME) | kami.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Realtime Register B.V. |
| Registered | 2025-11-29 |
| Expires | 2026-11-28 (40d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 07:16:44 | 752ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-10-05 06:02:31 | 734ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-30 05:27:04 | 497ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-25 20:26:06 | 608ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-21 07:22:24 | 1286ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-08-15 17:56:24 shown | 4457ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-08-09 03:06:22 | 1264ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-08-05 23:13:43 | 1643ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-08-04 11:42:25 | 2468ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-07-27 19:02:13 | 1106ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-07-24 18:15:48 | 1136ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-06-17 15:20:34 | 3121ms | 2 NS 2 A 2 MX | 🔓 Insecure |