citybo.dk

📜 Historical scan 2026-06-16 20:55:48 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

citybo.dk is a .dk domain served by 4 nameservers (ns01.hosit.dk, ns02.hosit.dk, ns03.hosit.dk and 1 more). It was registered on 21 August 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 52.17.45.100 is hosted by Amazon.com, Inc. (AS16509) in Ireland. Mail is handled by mx20.check4spam.dk, mx30.check4spam.dk and 1 more. The zone is not DNSSEC-signed, has no 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#

4 records 67ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.hosit.dk	—	—	—
ns02.hosit.dk	—	—	—
ns03.hosit.dk	—	—	—
ns04.hosit.dk	—	—	—

🌍 A Records#

1 records 71ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
52.17.45.100	—	ec2-52-17-45-100.eu-west-1.compute.amazonaws.com	AS16509	Amazon.com, Inc.	52.16.0.0/14	🇮🇪 Ireland	Dublin

📧 MX Records#

3 records 69ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	—	mx20.check4spam.dk	154.59.193.124	fe3-r3-in.du01.l.antispamcloud.com	AS16633 N-able Technologies, Inc.
10	—	mx30.check4spam.dk	154.59.104.23	fe2-r3-in.ams14.l.antispamcloud.com	AS174 Cogent Communications, LLC
10	—	mx40.check4spam.dk	154.59.104.23	fe2-r3-in.ams14.l.antispamcloud.com	AS174 Cogent Communications, LLC

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 191ms

TXT Record
bqlngmmio6l6fk0cc6jfam8gbo

✉️ SPF#

✗ No SPF record — mail spoofing not restricted

📨 DMARC#

✗ No DMARC record — mail spoofing not restricted

📬 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 2026-10-24 07:02:57

www	52.17.45.100 (AS16509) (address records, no CNAME)
www vs bare domain	Same network citybo.dk: 52.17.45.100 (AS16509) www.citybo.dk: 52.17.45.100 (AS16509)
Wildcard	No

🔗 TLSA / DANE#

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

🔐 DNSSEC#

151ms

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

🏷️ SOA#

68ms

Field	Value
Serial	2019061200
Primary NS (MNAME)	ns01.hosit.dk
Responsible (RNAME)	support@sit.dk
Refresh	28800s
Retry	7200s
Expire	1814400s
Minimum (neg-cache TTL)	86400s

📋 Registration#

WHOIS fetched 2026-10-07 13:18:21

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2017-08-21
Expires	2027-08-31 (310d)

📋 WHOIS#

⏱️ Lookup Timing#

67ms

71ms

69ms

AAAA

69ms

TXT

191ms

CAA

68ms

HTTPS

67ms

TLSA

51ms

SOA

68ms

MTA-STS

25ms

DNSSEC

151ms

SRV

0ms

Total

542ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-24 07:02:57	638ms	4 NS 1 A 3 MX	🔓 Insecure
2026-10-23 04:44:01	705ms	4 NS 1 A 3 MX	🔓 Insecure
2026-10-01 02:37:02	508ms	4 NS 1 A 3 MX	🔓 Insecure
2026-06-26 23:39:11	718ms	4 NS 1 A 3 MX	🔓 Insecure
2026-06-19 02:27:21	847ms	4 NS 1 A 3 MX	🔓 Insecure
2026-06-18 13:18:14	873ms	4 NS 1 A 3 MX	🔓 Insecure
2026-06-16 20:55:48 shown	542ms	4 NS 1 A 3 MX	🔓 Insecure