citysystem.dk

📜 Historical scan 2026-06-20 04:26:05 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

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.

🖥️ Nameservers#

2 records 57ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.dandomain.dk	185.25.141.3 2a02:2339:4006:109::dd	ns.dandomain.dk ns.dandomain.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.dandomain.dk	2a02:2339:1:108::dd:dd 91.197.248.66	ns2.dandomain.dk ns2.dandomain.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 53ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
5.9.113.4	360s	server2.jkhosting.dk	AS24940	Hetzner Online GmbH	5.9.0.0/16	🇩🇪 Germany	Falkenstein

📧 MX Records#

1 records 55ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	citysystem-dk.mail.protection.outlook.com	2a01:111:f403:ca04::6 2a01:111:f403:ca04::8 2a01:111:f403:ca09::20 2a01:111:f403:ca09::7 52.101.68.15 52.101.68.36 52.101.73.22 52.101.73.8	mail-db4pr02cu00406.inbound.protection.outlook.com mail-db5pr02cu00100.inbound.protection.outlook.com mail-as8pr05cu00400.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-db5pr02cu00104.inbound.protection.outlook.com mail-am7pr05cu00106.inbound.protection.outlook.com mail-am0pr04cu00500.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 52.98.206.248
🔶 Autoconfig	5.9.113.4

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 196ms

TXT Record
MS=ms29879428
v=spf1 mx a ip4:5.9.113.4 include:spf.azehosting.net include:spf.protection.outlook.com -all

✉️ SPF#

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

📨 DMARC#

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

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-11 09:49:10

www	5.9.113.4 (AS24940) (address records, no CNAME)
www vs bare domain	Same network citysystem.dk: 5.9.113.4 (AS24940) www.citysystem.dk: 5.9.113.4 (AS24940)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

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.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 5/10 · policy: -all

No problems found

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

131ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

55ms

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

📋 Registration#

WHOIS fetched 2026-10-06 20:42:35

Field	Value
Registrar	DANDOMAIN A/S
Registered	2022-12-02
Expires	2026-12-01 (43d)

📋 WHOIS#

⏱️ Lookup Timing#

57ms

53ms

55ms

AAAA

52ms

TXT

196ms

CAA

50ms

HTTPS

51ms

TLSA

147ms

SOA

55ms

MTA-STS

67ms

DNSSEC

131ms

SRV

724ms

Total

1243ms

🕐 Scan History#

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 shown	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	627ms	2 NS 1 A 1 MX	🔒 Secure