a-tjek.dk

Records from scan: 2026-06-20 01:19:52 · 1875ms total · last checked 2026-10-16 19:48 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

a-tjek.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was registered on 20 November 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.40.87 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by atjek-dk0c.mail.protection.outlook.com, mail.a-tjek.dk and 2 more. The zone is DNSSEC-signed and validates, 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#

2 records 45ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.curanet.dk	185.25.141.12 2a02:2339:4006:108::123	ns1.curanet.dk ns1.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.curanet.dk	2a02:2339:1:10f::123:123 91.197.248.75	ns2.curanet.dk ns2.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 44ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.40.87	300s	vm1447.enterprisecloud.nu	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records#

4 records 56ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	atjek-dk0c.mail.protection.outlook.com	2a01:111:f403:ca04::1 2a01:111:f403:ca04::a 2a01:111:f403:ca09::6 2a01:111:f403:ca09::7 52.101.68.27 52.101.68.8 52.101.73.30 52.101.73.4	mail-db7pr03cu00401.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-am4pr0401cu00106.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-db7pr03cu00503.inbound.protection.outlook.com mail-du0pr03cu00100.inbound.protection.outlook.com mail-am7pr05cu00306.inbound.protection.outlook.com mail-am0pr83cu00404.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
10	300s	mail.a-tjek.dk	185.21.42.81	director1.mf.curanet.dk	AS48854 team.blue Denmark A/S
20	300s	backup-mx.zitcom.dk	46.36.212.34 46.36.212.36 46.36.212.37 46.36.212.38 89.188.78.64 89.188.78.65 89.188.78.66 94.231.106.12	node4.spamfilter.io node8.spamfilter.io node6.spamfilter.io node7.spamfilter.io node3.spamfilter.io node9.spamfilter.io node10.spamfilter.io node2.spamfilter.io	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
32767	300s	ms83815096.msv1.invalid	—	—	—

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.101.76.184
🔶 Autoconfig	185.21.40.87

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 163ms

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

📝 TXT Records#

2 records 336ms

TXT Record
MS=ms83815096
v=spf1 include:spf.protection.outlook.com include:spf.simply.com include:web.shared.mysmtp.com -all

✉️ SPF#

Policy	Record (a-tjek.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:spf.simply.com include:web.shared.mysmtp.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#

checked 2026-10-16 19:48:42

www	185.21.40.87 (AS48854) (address records, no CNAME)
www vs bare domain	Same network a-tjek.dk: 185.21.40.87 (AS48854) www.a-tjek.dk: 185.21.40.87 (AS48854)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 6/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

125ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

39ms

Field	Value
Serial	2025081802
Primary NS (MNAME)	ns1.curanet.dk
Responsible (RNAME)	hostmaster@curanet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

WHOIS fetched 2026-10-10 15:43:52

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2017-11-20
Expires	2026-11-30 (44d)

📋 WHOIS#

⏱️ Lookup Timing#

45ms

44ms

56ms

AAAA

46ms

TXT

336ms

CAA

45ms

HTTPS

41ms

TLSA

1032ms

SOA

39ms

MTA-STS

70ms

DNSSEC

125ms

SRV

163ms

Total

1875ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-06-20 01:19:52 shown	1875ms	2 NS 1 A 4 MX	🔒 Secure
2026-06-16 13:15:41	2795ms	2 NS 1 A 4 MX	🔒 Secure