cmochallenges.dk is a .dk domain served by 2 nameservers (ajay.ns.cloudflare.com, kate.ns.cloudflare.com). It was registered on 28 April 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.85.201 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx10.mailspamprotection.com, mx20.mailspamprotection.com 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 our latest 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 |
|---|---|---|---|---|---|---|---|
| 104.21.85.201 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.209.238 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mx10.mailspamprotection.com | 34.149.79.66 | 66.79.149.34.bc.googleusercontent.com | AS396982 Google LLC |
| 20 | 300s | mx20.mailspamprotection.com | 34.120.156.61 | 61.156.120.34.bc.googleusercontent.com | AS396982 Google LLC |
| 30 | 300s | mx30.mailspamprotection.com | 34.111.121.216 | 216.121.111.34.bc.googleusercontent.com | AS396982 Google LLC |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 94.237.43.235 |
| 🔶 Autoconfig | 94.237.43.235 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3033::ac43:d1ee | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3036::6815:55c9 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.85.201,172.67.209.238 ech=AEX+DQBBRwAgACBa5pJ9ggD44siUUMenDvOC+TAO226ge+8xLI0J9SSndAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::ac43:d1ee,2606:4700:3036::6815:55c9 |
| www | 104.21.85.201 172.67.209.238 2606:4700:3033::ac43:d1ee 2606:4700:3036::6815:55c9 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network cmochallenges.dk: 104.21.85.201 172.67.209.238 2606:4700:3033::ac43:d1ee 2606:4700:3036::6815:55c9 (AS13335) www.cmochallenges.dk: 104.21.85.201 172.67.209.238 2606:4700:3033::ac43:d1ee 2606:4700:3036::6815:55c9 (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 | 2417332093 |
| Primary NS (MNAME) | ajay.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 | 2017-04-28 |
| Expires | 2027-04-30 (194d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 20:35:27 shown | 1321ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-12 19:18:57 | 625ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-09 10:59:13 | 2132ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-01 06:52:53 | 709ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-18 17:06:00 | 1300ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-15 05:10:21 | 9136ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-12 09:20:32 | 1235ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-25 05:32:56 | 932ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-16 23:57:08 | 65535ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-16 21:42:51 | 2006ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-16 21:31:30 | 2562ms | 2 NS 2 A 3 MX | 🔓 Insecure |