citystudent.dk

📜 Historical scan 2026-10-09 21:37:53 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

citystudent.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 18 May 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 78.46.12.208 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by citystudent-dk.mail.protection.outlook.com. 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.

🖥️ Nameservers#

3 records 324ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	2a02:2339:1:15c::4562:4562 91.197.248.78	ns1.simply.com ns1.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.simply.com	185.25.141.15 2a02:2339:4006:101::4562:4562	ns2.simply.com ns2.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns3.simply.com	91.197.248.79	ns3.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 310ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
78.46.12.208	600s	dedi5113.your-server.de	AS24940	Hetzner Online GmbH	78.46.0.0/15	🇩🇪 Germany	Nuremberg

📧 MX Records#

1 records 309ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	citystudent-dk.mail.protection.outlook.com	2a01:111:f403:ca04::d 2a01:111:f403:ca3c::a 2a01:111:f403:ca48::10 2a01:111:f403:ca48::a 52.101.103.143 52.101.103.162 52.101.68.15 52.101.73.155	mail-db6pr03cu00105.inbound.protection.outlook.com mail-zrxpr07cu00102.inbound.protection.outlook.com mail-miypr05cu00100.inbound.protection.outlook.com mail-miypr02cu00202.inbound.protection.outlook.com mail-miypr03cu00107.inbound.protection.outlook.com mail-miypr03cu00202.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-am7pr02cu00203.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 → 52.98.154.152

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 437ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records#

1 records 529ms

TXT Record
v=spf1 include:spf.itafdelingen.net include:o._spf.hostedsepo.dk include:spf.protection.outlook.com ip4:178.209.169.116 ip4:178.209.172.72 ip4:185.150.75.22 ip4:77.66.88.254 ip4:77.66.88.129 -all

✉️ SPF#

Policy	Record (citystudent.dk)
-all (hard fail)	v=spf1 include:spf.itafdelingen.net include:o._spf.hostedsepo.dk include:spf.protection.outlook.com ip4:178.209.169.116 ip4:178.209.172.72 ip4:185.150.75.22 ip4:77.66.88.254 ip4:77.66.88.129 -all

📨 DMARC#

Policy	Record (_dmarc.citystudent.dk)
p=quarantine	v=DMARC1; p=quarantine; sp=quarantine; ruf=mailto:postmaster@reconor.dk; rua=mailto:postmaster@reconor.dk; 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 2026-10-13 04:08:57

www CNAME	citystudent.dk (all on citystudent.dk) → 78.46.12.208 (AS24940)
www vs bare domain	Same network citystudent.dk: 78.46.12.208 (AS24940) www.citystudent.dk: 78.46.12.208 (AS24940)
Wildcard	No
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-citystudent-dk._domainkey.reconordk.onmicrosoft.com	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: 3/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

467ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✓ Found
Flags	unsigned answer

🏷️ SOA#

68ms

Field	Value
Serial	2026100800
Primary NS (MNAME)	ns1.simply.com
Responsible (RNAME)	hostmaster@simply.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-13 04:26:30

Field	Value
Registrar	Simply.com A/S
Registered	2010-05-18
Expires	2027-05-31 (218d)

🔗 Same registrant#

1 domain

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
citycontainerrtr.dk	Simply.com A/S

📋 WHOIS#

⏱️ Lookup Timing#

324ms

310ms

309ms

AAAA

345ms

TXT

529ms

CAA

86ms

HTTPS

329ms

TLSA

1112ms

SOA

68ms

MTA-STS

306ms

DNSSEC

467ms

SRV

437ms

Total

2556ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-13 04:08:57	1406ms	3 NS 1 A 1 MX	🔓 Insecure
2026-10-09 21:37:53 shown	2556ms	3 NS 1 A 1 MX	🔓 Insecure
2026-10-07 13:59:27	1173ms	3 NS 1 A 1 MX	🔓 Insecure
2026-10-04 13:07:24	730ms	3 NS 1 A 1 MX	🔓 Insecure
2026-09-23 11:43:01	729ms	3 NS 1 A 1 MX	🔓 Insecure
2026-09-02 15:19:59	1236ms	3 NS 1 A 1 MX	🔓 Insecure
2026-08-26 01:19:43	1375ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-25 09:30:38	1382ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-23 21:36:03	4683ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-22 16:12:46	990ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-16 21:58:24	65535ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 21:10:20	798ms	2 NS 1 A 1 MX	⚠️ Bogus
2026-06-16 21:09:09	1908ms	2 NS 1 A 1 MX	⚠️ Bogus
2026-06-16 21:00:35	681ms	2 NS 1 A 1 MX	🔒 Secure