arst.dk is a .dk domain served by 3 nameservers (helium.ns.hetzner.de, hydrogen.ns.hetzner.com, oxygen.ns.hetzner.com). It was registered on 7 August 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 49.13.83.139 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by mxext1.mailbox.org, mxext2.mailbox.org and 1 more. The zone is not DNSSEC-signed, publishes a DMARC policy and has no IPv6 address. 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| helium.ns.hetzner.de | — | — | — |
| hydrogen.ns.hetzner.com | — | — | — |
| oxygen.ns.hetzner.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 49.13.83.139 | — | epik.arst.dk | AS24940 | Hetzner Online GmbH | 49.12.0.0/15 | 🇩🇪 Germany | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | — | mxext1.mailbox.org | 80.241.60.212 | mx1.mailbox.org | AS199118 Heinlein Support GmbH |
| 10 | — | mxext2.mailbox.org | 80.241.60.215 | mx2.mailbox.org | AS199118 Heinlein Support GmbH |
| 20 | — | mxext3.mailbox.org | 80.241.60.216 | mx3.mailbox.org | AS199118 Heinlein Support GmbH |
| TXT Record |
|---|
| google-site-verification=c5XTk_p5hRBhNWP8dkKKgLOW4gsWjCleDbbpNH2eHfo |
| v=spf1 include:mailbox.org ~all |
| Policy | Record (arst.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:mailbox.org ~all |
| Policy | Record (_dmarc.arst.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; rua=mailto:postmaster@arst.dk; ruf=mailto:postmaster@arst.dk; |
| www | 49.13.83.139 (AS24940) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 2/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mxext1.mailbox.org | DANE-EE · SPKI · SHA-256 | E41CC7633029AFDBA53744D7E5FC31EF… |
| SMTP _25._tcp.mxext1.mailbox.org | DANE-EE · SPKI · SHA-256 | 4758AF6F02DFB5DC8795FA402E77A8A0… |
| SMTP _25._tcp.mxext1.mailbox.org | DANE-EE · SPKI · SHA-256 | 996AD31D65E03F038B8EC950F6F26611… |
| SMTP _25._tcp.mxext2.mailbox.org | DANE-EE · SPKI · SHA-256 | E41CC7633029AFDBA53744D7E5FC31EF… |
| SMTP _25._tcp.mxext2.mailbox.org | DANE-EE · SPKI · SHA-256 | 4758AF6F02DFB5DC8795FA402E77A8A0… |
| SMTP _25._tcp.mxext2.mailbox.org | DANE-EE · SPKI · SHA-256 | 996AD31D65E03F038B8EC950F6F26611… |
| SMTP _25._tcp.mxext3.mailbox.org | DANE-EE · SPKI · SHA-256 | E41CC7633029AFDBA53744D7E5FC31EF… |
| SMTP _25._tcp.mxext3.mailbox.org | DANE-EE · SPKI · SHA-256 | 996AD31D65E03F038B8EC950F6F26611… |
| SMTP _25._tcp.mxext3.mailbox.org | DANE-EE · SPKI · SHA-256 | 4758AF6F02DFB5DC8795FA402E77A8A0… |
| 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 | 2026040102 |
| Primary NS (MNAME) | hydrogen.ns.hetzner.com |
| Responsible (RNAME) | dns@hetzner.com |
| Refresh | 86400s |
| Retry | 10800s |
| Expire | 3600000s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2022-08-07 |
| Expires | 2027-08-06 (293d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-07-02 00:04:55 | 1266ms | 3 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-16 13:41:38 shown | 1061ms | 3 NS 1 A 3 MX | 🔓 Insecure |