cusp.dk is a .dk domain served by 2 nameservers (rayne.ns.cloudflare.com, ruben.ns.cloudflare.com). It was registered on 24 March 2026 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. On 6 September 2026 we saw it transfer from DANDOMAIN A/S to Realtime Register B.V.. Its website address 104.21.63.237 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by route3.mx.cloudflare.net, route1.mx.cloudflare.net and 1 more. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.63.237 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.173.26 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 104.21.63.237 |
| 🔶 Autoconfig | 104.21.63.237 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::6815:3fed | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3034::ac43:ad1a | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.63.237,172.67.173.26 ech=AEX+DQBBbQAgACDRh8EBBYsg5gKR/MjDbn7NihoT9MYyzy/BWffmjeQMZwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:3fed,2606:4700:3034::ac43:ad1a |
| TXT Record |
|---|
| v=spf1 include:_spf.mx.cloudflare.net ~all |
| Policy | Record (cusp.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.mx.cloudflare.net ~all |
| www CNAME | cusp.dk (all on cusp.dk) → 72.62.40.138 (AS47583) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 1/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.route1.mx.cloudflare.net | DANE-TA · SPKI · SHA-256 | 59E738E674221702AF1EDB87C5200C1A… |
| SMTP _25._tcp.route1.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 0F0C6C164A36F97E7B4C5A5B69D6F4F2… |
| SMTP _25._tcp.route1.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 9BE5B7D47F9EFF930C11EB04D27CAE6B… |
| SMTP _25._tcp.route2.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 0F0C6C164A36F97E7B4C5A5B69D6F4F2… |
| SMTP _25._tcp.route2.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 9BE5B7D47F9EFF930C11EB04D27CAE6B… |
| SMTP _25._tcp.route2.mx.cloudflare.net | DANE-TA · SPKI · SHA-256 | 59E738E674221702AF1EDB87C5200C1A… |
| SMTP _25._tcp.route3.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 0F0C6C164A36F97E7B4C5A5B69D6F4F2… |
| SMTP _25._tcp.route3.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 9BE5B7D47F9EFF930C11EB04D27CAE6B… |
| SMTP _25._tcp.route3.mx.cloudflare.net | DANE-TA · SPKI · SHA-256 | 59E738E674221702AF1EDB87C5200C1A… |
| 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 | 2407050916 |
| Primary NS (MNAME) | rayne.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 | 2026-03-24 |
| Expires | 2027-03-23 (156d) |
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).
| Domain | Registrar |
|---|---|
| dataformidleren.dk | DANDOMAIN A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-17 07:45:36 | 1341ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-16 06:25:03 | 1832ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-08 09:45:49 | 1200ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-01 05:05:09 | 850ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-24 03:50:36 | 881ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-22 02:24:16 | 1442ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-11 07:56:58 | 871ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-06 18:41:32 | 1289ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-31 21:56:24 | 2609ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-27 02:26:16 | 992ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-26 02:01:14 | 2768ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-20 04:29:22 | 2405ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-13 10:31:35 | 1147ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-08 05:42:38 | 1033ms | 2 NS 1 A 2 MX | ❓ Unknown |
| 2026-08-05 01:23:38 | 3185ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-07-26 10:14:11 | 2033ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-07-02 00:38:23 shown | 1389ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-16 23:16:20 | 2828ms | 2 NS 2 A 3 MX | 🔓 Insecure |