citybo.dk

📜 Historical scan 2026-06-18 13:18:14 · ← 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 119ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.hosit.dk	193.104.202.31	ns01.hosit.dk	AS50346 It Forum Gruppen A/s
ns02.hosit.dk	87.116.23.114	ns02.hosit.dk	AS31027 GlobalConnect A/S
ns03.hosit.dk	152.115.55.201	ns04.hosit.dk	AS31027 GlobalConnect A/S
ns04.hosit.dk	152.115.55.201	ns04.hosit.dk	AS31027 GlobalConnect A/S

🌍 A Records#

1 records 76ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
52.17.45.100	86400s	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 34ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	86400s	mx20.check4spam.dk	154.59.193.124 2001:978:2:6::f:124	fe3-r3-in.du01.l.antispamcloud.com fe3-r3-in.du01.l.antispamcloud.com	AS16633 N-able Technologies, Inc. AS174 Cogent Communications, LLC
10	86400s	mx30.check4spam.dk	154.59.104.23 2001:978:2:2c::137:100	fe2-r3-in.ams14.l.antispamcloud.com fe2-r3-in.ams14.l.antispamcloud.com	AS174 Cogent Communications, LLC AS174 Cogent Communications, LLC
10	86400s	mx40.check4spam.dk	154.59.104.23 2001:978:2:2c::137:100	fe2-r3-in.ams14.l.antispamcloud.com fe2-r3-in.ams14.l.antispamcloud.com	AS174 Cogent Communications, LLC 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 179ms

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#

68ms

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

🏷️ SOA#

36ms

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 (309d)

📋 WHOIS#

⏱️ Lookup Timing#

119ms

76ms

34ms

AAAA

77ms

TXT

179ms

CAA

36ms

HTTPS

39ms

TLSA

227ms

SOA

36ms

MTA-STS

48ms

DNSSEC

68ms

SRV

131ms

Total

873ms

🕐 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 shown	873ms	4 NS 1 A 3 MX	🔓 Insecure
2026-06-16 20:55:48	542ms	4 NS 1 A 3 MX	🔓 Insecure