sinusmail.dk is a .dk domain served by 2 nameservers (kurt.ns.cloudflare.com, nadia.ns.cloudflare.com). It was registered on 29 July 2009 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.88.147 is hosted by Cloudflare, Inc. (AS13335). The zone is DNSSEC-signed and validates, 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 |
|---|---|---|---|---|---|---|---|
| 104.21.88.147 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.185.4 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3033::6815:5893 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3033::ac43:b904 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.88.147,172.67.185.4 ech=AEX+DQBBBQAgACAVsMpmgZ3l/SMtYfyeo5fqitS5TdYk2W+6eZ/m+mH/YgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::6815:5893,2606:4700:3033::ac43:b904 |
| www | 185.10.10.80 (AS51468) (address records, no CNAME) |
| www vs bare domain | Different networks sinusmail.dk: 104.21.88.147 172.67.185.4 2606:4700:3033::6815:5893 2606:4700:3037::ac43:b904 (AS13335) (all like this)www.sinusmail.dk: 185.10.10.80 (AS51468) |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.sinusmail.dk | _6HIzLFcONhN-jwOqcbZ077xyl4PGtYbJ1SAtuIyXt8 |
| TXT | _acme-challenge.sinusmail.dk | jA6W6F9O0AQDG-Q5AjOnRzyG8VuZhDbZcjUzb2wJ4ls |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2407336118 |
| Primary NS (MNAME) | kurt.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 | 2009-07-29 |
| Expires | 2027-07-31 (284d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-16 15:07:25 | 1878ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-10-14 09:25:53 | 1890ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-09-23 15:53:46 | 589ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-08-27 08:04:36 | 554ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-08-26 08:01:35 | 1311ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-08-25 13:49:25 | 3916ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-08-22 07:05:22 | 1043ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-08-18 00:52:38 | 4511ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-08-07 18:08:02 | 1743ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-07-11 03:36:01 | 989ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-07-01 10:01:19 | 766ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-06-24 06:40:10 | 922ms | 2 NS 2 A 0 MX | ⚠️ Bogus |
| 2026-06-20 22:08:05 | 2742ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-06-19 21:16:52 shown | 1216ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-06-17 13:27:33 | 2584ms | 2 NS 2 A 0 MX | 🔒 Secure |