opo.dk is a .dk domain served by 2 nameservers (archer.ns.cloudflare.com, melina.ns.cloudflare.com). It was registered on 23 July 2001 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.46.114 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by .. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.46.114 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.168.119 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 300s | . Null MX — domain accepts no email (RFC 7505) | |||
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 172.67.168.119 |
| 🔶 Autoconfig | 104.21.46.114 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::6815:2e72 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3034::ac43:a877 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.46.114,172.67.168.119 ech=AEX+DQBBQAAgACDkbcj5PV99YRoi17jXsrNp0J2+mM3t+uvgYSRwQeiNTgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:2e72,2606:4700:3034::ac43:a877 |
| www | 104.21.46.114 172.67.168.119 2606:4700:3030::6815:2e72 2606:4700:3034::ac43:a877 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| 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 | 2415044404 |
| Primary NS (MNAME) | archer.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Netsite A/S |
| Registered | 2001-07-23 |
| Expires | 2027-09-30 (347d) |
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).
| Domain | Registrar |
|---|---|
| ibenpedersen.dk | Netsite A/S |
| matmagi.dk | nordicway ApS |
| nacl.dk | Netsite A/S |
| onlineblaabog.dk | Netsite A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-25 01:18:17 shown | 583ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-18 07:47:44 | 1510ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-12 11:36:06 | 991ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-03 19:44:22 | 9447ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-31 11:09:23 | 1699ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-27 22:32:07 | 1004ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-20 11:00:12 | 6551ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-16 03:04:16 | 5893ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-19 09:33:57 | 2749ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-28 02:46:09 | 1784ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-26 00:21:36 | 771ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-23 20:26:44 | 2633ms | 2 NS 2 A 1 MX | ❓ Unknown |
| 2026-06-21 11:37:40 | 1113ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-17 12:10:43 | 943ms | 2 NS 2 A 0 MX | 🔓 Insecure |