derbyguide.dk is a .dk domain served by 2 nameservers (irena.ns.cloudflare.com, kolton.ns.cloudflare.com). It was registered on 20 April 2026 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.30.173 is hosted by Cloudflare, Inc. (AS13335). 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 |
|---|---|---|---|---|---|---|---|
| 104.21.30.173 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.173.121 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 104.21.30.173 |
| 🔶 Autoconfig | 104.21.30.173 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3033::6815:1ead | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3034::ac43:ad79 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.30.173,172.67.173.121 ech=AEX+DQBBIwAgACAhvfckN+EK0sWDh7fL0fPIfljjWi3KhaxfcRLo4pDqSAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::6815:1ead,2606:4700:3034::ac43:ad79 |
| www | 104.21.30.173 172.67.173.121 2606:4700:3033::6815:1ead 2606:4700:3034::ac43:ad79 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network derbyguide.dk: 104.21.30.173 172.67.173.121 2a06:98c1:3120::1 2a06:98c1:3121::1 (AS13335) www.derbyguide.dk: 104.21.30.173 172.67.173.121 2606:4700:3033::6815:1ead 2606:4700:3034::ac43:ad79 (AS13335) |
| Wildcard | Yes: any name under the zone resolves |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
| 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 | 2414382267 |
| Primary NS (MNAME) | irena.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 | 2026-04-20 |
| Expires | 2027-04-19 (184d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-04 14:49:21 | 582ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-10-03 14:42:35 | 549ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-27 13:47:08 | 1198ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-10 10:34:57 shown | 2442ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-11 08:49:21 | 1229ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-25 23:50:39 | 465ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-19 20:03:54 | 446ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 02:05:30 | 380ms | 2 NS 1 A 0 MX | 🔒 Secure |