dagu.dk is a .dk domain served by 2 nameservers (aurora.ns.cloudflare.com, miguel.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.82.51 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mail.tutanota.de. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.82.51 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.153.143 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mail.tutanota.de | 185.205.69.211 185.205.69.213 185.205.69.214 |
mail.w11.tutanota.de mail.w13.tutanota.de mail.w14.tutanota.de |
AS210909 Tutao GmbH AS210909 Tutao GmbH AS210909 Tutao GmbH |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 104.21.82.51 |
| 🔶 Autoconfig | 172.67.153.143 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::6815:5233 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3033::ac43:998f | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.82.51,172.67.153.143 ech=AEX+DQBB/QAgACCXLkFLN7yMFb77BMNo40X29G1CFyB7CNGZiyLsEMdYQAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:5233,2606:4700:3033::ac43:998f |
| TXT Record |
|---|
| t-verify=cfc988d42c3330686afc5ab147584b37 |
| v=spf1 include:spf.tutanota.de -all |
| Policy | Record (dagu.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.tutanota.de -all |
| Policy | Record (_dmarc.dagu.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; adkim=s |
| www | 104.21.82.51 172.67.153.143 2606:4700:3030::6815:5233 2606:4700:3033::ac43:998f (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
DNS lookups: 1/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.dagu.dk | -3dWBedqj4FS0NlwO2QWlRcT8y5KbjuzdxgVirrekWs |
| TXT | _acme-challenge.dagu.dk | tjw-818cRmpB2bJzdNtwIYxj6oWDmz7_FT27dpjOY-I |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.tutanota.de | DANE-EE · SPKI · SHA-256 | 5AE0D6DC8A713441003F578C5A1D4D70… |
| SMTP _25._tcp.mail.tutanota.de | DANE-EE · Full cert · SHA-256 | D141F8F3A4AAC2E4D2677AAFCC723D8E… |
| 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 | 2417562668 |
| Primary NS (MNAME) | aurora.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-16 00:31:41 shown | 892ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-26 17:07:07 | 763ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-13 03:49:08 | 816ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-03 14:14:23 | 9827ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-29 07:45:27 | 1520ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-19 00:31:30 | 1566ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-17 11:03:41 | 1256ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-15 11:17:09 | 3999ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-02 14:12:09 | 26797ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-25 09:38:24 | 1169ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-24 02:19:04 | 1076ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-16 23:50:15 | 428ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-16 23:41:15 | 562ms | 2 NS 2 A 1 MX | 🔓 Insecure |