2100ø.dk is a .dk domain served by 2 nameservers (dell.ns.cloudflare.com, karl.ns.cloudflare.com). It was registered on 18 February 2020 (WHOIS) and 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 DNSSEC-signed and validates, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 104.21.10.178 | 600s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.146.41 | 600s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 600s | 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 | 104.21.10.178 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::ac43:9229 | 600s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3032::6815:ab2 | 600s | — | 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+DQBB/AAgACBaZWgJlxfm/jvVSIvyso5pBq4qdMs3HRwrPFZ7M2ZoOQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:9229,2606:4700:3032::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 | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | resolution failed: ncache nxdomain |
| Field | Value |
|---|---|
| Serial | 2404116394 |
| Primary NS (MNAME) | dell.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 | 2020-02-18 |
| Expires | 2027-02-28 (125d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-24 05:43:16 | 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 shown | 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 |