dco.dk is a .dk domain served by 2 nameservers (koa.ns.cloudflare.com, savanna.ns.cloudflare.com). It was registered on 13 November 1997 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.37.194 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mail.dco.dk. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.37.194 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.212.173 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mail.dco.dk | 104.21.37.194 172.67.212.173 2606:4700:3030::6815:25c2 2606:4700:3035::ac43:d4ad |
— — — — |
AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 172.67.212.173 |
| 🔶 Autoconfig | 172.67.212.173 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::6815:25c2 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::ac43:d4ad | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.37.194,172.67.212.173 ech=AEX+DQBBdAAgACCrlhIv03QoIIRMaEQ8GNpowq1LUde5Ju96mbxfgn7gPAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:25c2,2606:4700:3035::ac43:d4ad |
| www | 104.21.37.194 172.67.212.173 2606:4700:3030::6815:25c2 2606:4700:3035::ac43:d4ad (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 | 2416674219 |
| Primary NS (MNAME) | koa.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 | 1997-11-13 |
| Expires | 2026-12-31 (70d) |
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 |
|---|---|---|---|
| 2026-10-05 19:24:24 shown | 871ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-30 19:09:07 | 714ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-24 03:39:08 | 681ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-11 22:51:07 | 995ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-11 22:53:59 | 4517ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-18 05:08:57 | 3268ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-12 12:34:39 | 830ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-01 23:53:15 | 638ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 01:32:08 | 387ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 01:21:24 | 508ms | 2 NS 1 A 1 MX | 🔒 Secure |