kosto.dk

📜 Historical scan 2026-06-24 17:29:47 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

kosto.dk is a .dk domain served by 4 nameservers (auth31.ns.sonnit.dk, auth32.ns.sonnit.dk, auth33.ns.sonnit.dk and 1 more). It was registered on 22 August 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by kosto-dk.mail.protection.outlook.com. 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 56ms

Nameserver	IP addresses	PTR	ASN / ISP
auth31.ns.sonnit.dk	185.136.96.66 2a06:fb00:1::1:66	pns31.cloudns.net pns31.cloudns.net	AS203391 Cloud DNS Ltd AS203391 Cloud DNS Ltd
auth32.ns.sonnit.dk	185.136.97.66 2a06:fb00:1::2:66	pns32.cloudns.net pns32.cloudns.net	AS203391 Cloud DNS Ltd AS203391 Cloud DNS Ltd
auth33.ns.sonnit.dk	185.136.98.66 2a06:fb00:1::3:66	pns33.cloudns.net pns33.cloudns.net	AS203391 Cloud DNS Ltd AS203391 Cloud DNS Ltd
auth34.ns.sonnit.dk	185.136.99.66 2a06:fb00:1::4:66	pns34.cloudns.net pns34.cloudns.net	AS203391 Cloud DNS Ltd AS203391 Cloud DNS Ltd

🌍 A Records#

🌍

No A records found

📧 MX Records#

1 records 43ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	kosto-dk.mail.protection.outlook.com	2a01:111:f403:ca09::1 2a01:111:f403:ca09::6 2a01:111:f403:ca09::8 2a01:111:f403:ca09::c 52.101.68.12 52.101.68.39 52.101.73.24 52.101.73.26	mail-as9pr07cu00301.inbound.protection.outlook.com mail-am4pr0401cu00106.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-as8pr05cu00304.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-db7pr03cu00607.inbound.protection.outlook.com mail-as8pr05cu00300.inbound.protection.outlook.com mail-as9pr05cu01302.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 77ms

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

📝 TXT Records#

1 records 209ms

TXT Record
v=spf1 mx include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (kosto.dk)
-all (hard fail)	v=spf1 mx include:spf.protection.outlook.com -all

📨 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 2026-10-08 11:21:07

www	NXDOMAIN
www vs bare domain	Neither resolves kosto.dk: no address www.kosto.dk: no address
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

106ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	resolution failed: ncache nxrrset

🏷️ SOA#

44ms

Field	Value
Serial	2020030801
Primary NS (MNAME)	auth31.ns.sonnit.dk
Responsible (RNAME)	support@sonnit.dk
Refresh	7200s
Retry	1800s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-09 23:01:56

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2017-08-22
Expires	2027-08-31 (315d)

📋 WHOIS#

⏱️ Lookup Timing#

56ms

50ms

43ms

AAAA

54ms

TXT

209ms

CAA

45ms

HTTPS

41ms

TLSA

684ms

SOA

44ms

MTA-STS

61ms

DNSSEC

106ms

SRV

77ms

Total

1432ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-08 11:21:07	1105ms	4 NS 0 A 1 MX	🔓 Insecure
2026-09-27 03:09:35	880ms	4 NS 0 A 1 MX	🔓 Insecure
2026-08-25 12:21:40	5710ms	4 NS 0 A 1 MX	🔓 Insecure
2026-06-28 13:23:41	6931ms	4 NS 0 A 1 MX	🔓 Insecure
2026-06-27 09:25:03	1430ms	4 NS 0 A 1 MX	🔓 Insecure
2026-06-24 17:29:47 shown	1432ms	4 NS 0 A 1 MX	🔓 Insecure
2026-06-22 07:00:08	1184ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-20 02:29:45	695ms	4 NS 0 A 1 MX	🔓 Insecure
2026-06-19 11:01:14	1546ms	4 NS 0 A 1 MX	⚠️ Bogus
2026-06-18 08:47:09	1018ms	4 NS 0 A 1 MX	🔓 Insecure