2100ø.dk is a .dk domain served by 2 nameservers (dell.ns.cloudflare.com, karl.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.10.178 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by nl1-tr3.supercp.com. The zone is not DNSSEC-signed, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 104.21.10.178 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.146.41 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | nl1-tr3.supercp.com | 185.146.22.242 | nl1-tr3.supercp.com | AS209341 WHG Hosting Services Ltd |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 104.21.10.178 |
| 🔶 Autoconfig | 172.67.146.41 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::ac43:9229 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::6815:ab2 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.10.178,172.67.146.41 ech=AEX+DQBBeQAgACDa54LTUwndqlIQMLIFxhmOAwxAamUkZM5x4k98EScBfQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:9229,2606:4700:3037::6815:ab2 |
| TXT Record |
|---|
| v=spf1 +a +mx ip4:185.146.22.242 include:spf.supercp.com -all |
| Policy | Record (2100ø.dk) |
|---|---|
| -all (hard fail) | v=spf1 +a +mx ip4:185.146.22.242 include:spf.supercp.com -all |
| Policy | Record (_dmarc.2100ø.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject |
| www | 104.21.10.178 172.67.146.41 2606:4700:3031::ac43:9229 2606:4700:3037::6815:ab2 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 4/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.2100ø.dk | DnCeCXLnSjeZ_gpOBp3Z7KBkjSzKJ-XZoISRzZHTRQM |
| 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 | 2415600210 |
| Primary NS (MNAME) | dell.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-24 05:43:16 shown | 826ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-22 20:53:04 | 1629ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-12 18:38:21 | 1053ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-24 22:19:25 | 1346ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-14 19:48:28 | 9356ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-21 09:12:27 | 637ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-20 22:27:07 | 1185ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-16 13:08:42 | 4190ms | 2 NS 2 A 1 MX | 🔒 Secure |