en1.dk is a .dk domain served by 2 nameservers (abdullah.ns.cloudflare.com, piper.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.5.51 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mailcow.en1.dk. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.5.51 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.132.252 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mailcow.en1.dk | 91.99.134.207 | static.207.134.99.91.clients.your-server.de | AS24940 Hetzner Online GmbH |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | mailcow.en1.dk → 91.99.134.207 |
| 🔶 Autoconfig | mailcow.en1.dk → 91.99.134.207 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3035::6815:533 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::ac43:84fc | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.5.51,172.67.132.252 ech=AEX+DQBBfQAgACDNaAfAfAoQPHxoVrmj1DP8fqwD3X325HwHcrQv7Gf/CAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3035::6815:533,2606:4700:3037::ac43:84fc |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 10 | 443 | mailcow.en1.dk |
| TXT Record |
|---|
| v=spf1 ip4:91.99.134.207 ~all |
| Policy | Record (en1.dk) |
|---|---|
| ~all (soft fail) | v=spf1 ip4:91.99.134.207 ~all |
| Policy | Record (_dmarc.en1.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none |
| www | 104.21.5.51 172.67.132.252 2606:4700:3035::6815:533 2606:4700:3037::ac43:84fc (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Selector | CNAME | Key |
|---|---|---|
| dkim | — | RSA · ~2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 0/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mailcow.en1.dk | DANE-EE · SPKI · SHA-256 | 1CC33EACD6E461EAD863AEC4C350C0B9… |
| SMTP _25._tcp.mailcow.en1.dk | DANE-EE · SPKI · SHA-256 | FF451B9658BAC58654C92A17C15AF204… |
| 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 | 2416083393 |
| Primary NS (MNAME) | abdullah.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 16:58:28 shown | 1162ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-30 04:11:43 | 603ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-28 20:32:49 | 2117ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-23 19:07:47 | 3033ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-22 15:07:40 | 10049ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-06 22:14:00 | 1098ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-26 22:33:30 | 3044ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-21 19:48:27 | 6374ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-31 20:00:01 | 1238ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-22 22:10:34 | 1055ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-17 07:21:26 | 630ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-17 07:21:10 | 2511ms | 2 NS 2 A 1 MX | 🔓 Insecure |