citysystem.dk is a .dk domain served by 2 nameservers (ns.dandomain.dk, ns2.dandomain.dk). It was registered on 2 December 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 5.9.113.4 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by citysystem-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, 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 |
|---|---|---|---|
| ns.dandomain.dk | — | — | — |
| ns2.dandomain.dk | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 5.9.113.4 | — | server2.jkhosting.dk | AS24940 | Hetzner Online GmbH | 5.9.0.0/16 | 🇩🇪 Germany | Falkenstein |
| TXT Record |
|---|
| MS=ms29879428 |
| v=spf1 mx a ip4:5.9.113.4 include:spf.azehosting.net include:spf.protection.outlook.com -all |
| Policy | Record (citysystem.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx a ip4:5.9.113.4 include:spf.azehosting.net include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.citysystem.dk) |
|---|---|
| p=reject | v=DMARC1;p=reject;sp=reject;pct=100;rua=mailto:michael@joomlakonsulenten.dk;ruf=mailto:michael@joomlakonsulenten.dk;ri=86400;aspf=r;adkim=r;fo=1 |
| Selector | CNAME | Key |
|---|---|---|
| default | — | 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: 5/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2023031402 |
| Primary NS (MNAME) | ns.dandomain.dk |
| Responsible (RNAME) | hostmaster@dandomain.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | DANDOMAIN A/S |
| Registered | 2022-12-02 |
| Expires | 2026-12-01 (44d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 00:52:04 | 786ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-28 02:42:53 | 1522ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 23:49:51 | 10097ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-25 00:21:28 | 2214ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-23 20:41:07 | 1149ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-20 04:26:05 | 1243ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 23:13:18 | 65535ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 21:09:20 | 512ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 21:07:42 | 1875ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 21:01:38 shown | 627ms | 2 NS 1 A 1 MX | 🔒 Secure |