2o.dk is a .dk domain served by 2 nameservers (kate.ns.cloudflare.com, terry.ns.cloudflare.com). It was registered on 19 February 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.2.238 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mail.exer.dk. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.2.238 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.129.209 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mail.exer.dk | 2a04:52c0:108:c9a4::1 5.255.103.58 |
mail.exer.dk mail.exer.dk |
AS60404 The Infrastructure Group B.V. AS60404 The Infrastructure Group B.V. |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 172.67.129.209 |
| 🔶 Autoconfig | 104.21.2.238 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3036::ac43:81d1 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::6815:2ee | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.2.238,172.67.129.209 ech=AEX+DQBBdAAgACBWC2CHb5OuEHNJoaoB105kUseL7EWzQtPsB+MAPPVYBQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3036::ac43:81d1,2606:4700:3037::6815:2ee |
| www | 104.21.2.238 172.67.129.209 2606:4700:3036::ac43:81d1 2606:4700:3037::6815:2ee (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.exer.dk | DANE-EE · SPKI · SHA-256 | 59397706616DA37C4D924055C30DFAA3… |
| 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 | 2411469233 |
| Primary NS (MNAME) | kate.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 | 2023-02-19 |
| Expires | 2036-02-18 (3411d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-07 15:12:44 | 1550ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-10-06 15:07:24 | 2031ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-30 13:13:33 | 904ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-29 16:30:45 | 856ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-17 17:19:03 | 2105ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-26 05:18:27 | 905ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-10 13:56:24 shown | 4607ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-15 19:23:16 | 3119ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-16 12:55:25 | 3481ms | 2 NS 2 A 1 MX | 🔓 Insecure |