istanbul.dk

Records from scan: 2026-10-12 21:31:35 · 809ms total · last checked 2026-10-17 00:40 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

istanbul.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 7 April 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 178.20.216.181 is hosted by Atea A/S (AS21060) in Denmark. Mail is handled by server.cooperante.dk. The zone is not DNSSEC-signed, has no DMARC policy and has no IPv6 address. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

3 records 110ms

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 106ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
178.20.216.181	28800s	server.cooperante.dk	AS21060	Atea A/S	178.20.216.0/23	🇩🇰 Denmark	—

📧 MX Records#

1 records 126ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	server.cooperante.dk	178.20.216.181	server.cooperante.dk	AS21060 Atea A/S

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	178.20.216.181
🔶 Autoconfig	178.20.216.181

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 287ms

TXT Record
google-site-verification=eQA4YakQ7sRGBJNLlsfEdGjI2j-nAmnMGhiI_8Ppqlg

✉️ 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#

checked 2026-10-12 21:31:35

www	178.20.216.181 (AS21060) (address records, no CNAME)
www vs bare domain	Same network istanbul.dk: 178.20.216.181 (AS21060) www.istanbul.dk: 178.20.216.181 (AS21060)
Wildcard	Yes: any name under the zone resolves
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

🔗 TLSA / DANE#

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

🔐 DNSSEC#

209ms

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

🏷️ SOA#

81ms

Field	Value
Serial	2026101200
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 2026-10-05 03:10:41

Field	Value
Registrar	Simply.com A/S
Registered	1999-04-07
Expires	2027-06-30 (255d)

📋 WHOIS#

⏱️ Lookup Timing#

110ms

106ms

126ms

AAAA

107ms

TXT

287ms

CAA

117ms

HTTPS

135ms

TLSA

143ms

SOA

81ms

MTA-STS

120ms

DNSSEC

209ms

SRV

145ms

Total

809ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-12 21:31:35 shown	809ms	3 NS 1 A 1 MX	🔓 Insecure
2026-10-04 06:42:44	474ms	3 NS 1 A 1 MX	🔓 Insecure
2026-09-13 16:39:41	500ms	3 NS 1 A 1 MX	🔓 Insecure
2026-08-24 21:45:19	463ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-26 12:55:08	670ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-24 10:22:50	754ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-20 19:00:03	850ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-18 05:25:32	705ms	2 NS 1 A 1 MX	🔓 Insecure