kosto.dk

📜 Historical scan 2026-08-25 12:21:40 · ← 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 63ms

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 55ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	60s	kosto-dk.mail.protection.outlook.com	2a01:111:f403:ca04::10 2a01:111:f403:ca04::8 2a01:111:f403:ca09::2 2a01:111:f403:ca09::7 52.101.68.29 52.101.68.36 52.101.68.8 52.101.73.28	mail-dbapr03cu00100.inbound.protection.outlook.com mail-db5pr02cu00100.inbound.protection.outlook.com mail-am0pr83cu00402.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-dbapr03cu00105.inbound.protection.outlook.com mail-db5pr02cu00104.inbound.protection.outlook.com mail-du0pr03cu00100.inbound.protection.outlook.com mail-am7pr05cu00204.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 → 40.104.116.8

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 89ms

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

📝 TXT Records#

1 records 260ms

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#

90ms

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#

0ms

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 (314d)

📋 WHOIS#

⏱️ Lookup Timing#

63ms

53ms

55ms

AAAA

54ms

TXT

260ms

CAA

60ms

HTTPS

61ms

TLSA

337ms

SOA

0ms

MTA-STS

72ms

DNSSEC

90ms

SRV

89ms

Total

5710ms

🕐 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 shown	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	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