optimalcheckout.dk

📜 Historical scan 2026-06-18 06:54:53 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

optimalcheckout.dk is a .dk domain served by 4 nameservers (ns-1516.awsdns-61.org, ns-1560.awsdns-03.co.uk, ns-376.awsdns-47.com and 1 more). It was registered on 8 November 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 34.242.146.173 is hosted by Amazon.com, Inc. (AS16509) in Ireland. Mail is handled by mxz1.klarna.com, mxz2.klarna.com and 4 more. The zone is not DNSSEC-signed, publishes a 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 30ms

Nameserver	IP addresses	PTR	ASN / ISP
ns-1516.awsdns-61.org	205.251.197.236 2600:9000:5305:ec00::1	ns-1516.awsdns-61.org ns-1516.awsdns-61.org	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.
ns-1560.awsdns-03.co.uk	205.251.198.24 2600:9000:5306:1800::1	ns-1560.awsdns-03.co.uk ns-1560.awsdns-03.co.uk	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.
ns-376.awsdns-47.com	205.251.193.120 2600:9000:5301:7800::1	ns-376.awsdns-47.com ns-376.awsdns-47.com	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.
ns-731.awsdns-27.net	205.251.194.219 2600:9000:5302:db00::1	ns-731.awsdns-27.net ns-731.awsdns-27.net	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.

🌍 A Records#

3 records 50ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
34.242.146.173	—	ec2-34-242-146-173.eu-west-1.compute.amazonaws.com	AS16509	Amazon.com, Inc.	34.240.0.0/12	🇮🇪 Ireland	Dublin
52.208.181.45	—	ec2-52-208-181-45.eu-west-1.compute.amazonaws.com	AS16509	Amazon.com, Inc.	52.208.0.0/13	🇮🇪 Ireland	Dublin
52.213.99.25	—	ec2-52-213-99-25.eu-west-1.compute.amazonaws.com	AS16509	Amazon.com, Inc.	52.208.0.0/13	🇮🇪 Ireland	Dublin

📧 MX Records#

6 records 42ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	—	mxz1.klarna.com	52.30.236.203	ec2-52-30-236-203.eu-west-1.compute.amazonaws.com	AS16509 Amazon.com, Inc.
10	—	mxz2.klarna.com	54.73.174.245	ec2-54-73-174-245.eu-west-1.compute.amazonaws.com	AS16509 Amazon.com, Inc.
10	—	mxz3.klarna.com	3.73.181.240	ec2-3-73-181-240.eu-central-1.compute.amazonaws.com	AS16509 Amazon.com, Inc.
20	—	mxz4.klarna.com	35.156.176.213	ec2-35-156-176-213.eu-central-1.compute.amazonaws.com	AS16509 Amazon.com, Inc.
20	—	mxz5.klarna.com	—	—	—
20	—	mxz6.klarna.com	—	—	—

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 253ms

TXT Record
v=spf1 include:klarna.com -all

✉️ SPF#

Policy	Record (optimalcheckout.dk)
-all (hard fail)	v=spf1 include:klarna.com -all

📨 DMARC#

Policy	Record (_dmarc.optimalcheckout.dk)
p=reject	v=DMARC1; p=reject; adkim=r; aspf=r; fo=1; rua=mailto:dmarc-reports@klarna.com

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

3 records 43ms

Flags	Tag	Value
0	iodef	mailto:dns-admin@klarna.com
0	issue	amazonaws.com
0	issuewild	amazonaws.com

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-09 08:31:20

www	176.34.121.189 34.253.81.102 52.211.144.239 (AS16509) (address records, no CNAME)
www vs bare domain	Same network optimalcheckout.dk: 176.34.121.189 34.253.81.102 52.211.144.239 (AS16509) www.optimalcheckout.dk: 176.34.121.189 34.253.81.102 52.211.144.239 (AS16509)
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 7/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

114ms

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

🏷️ SOA#

54ms

Field	Value
Serial	1
Primary NS (MNAME)	ns-376.awsdns-47.com
Responsible (RNAME)	awsdns-hostmaster@amazon.com
Refresh	7200s
Retry	900s
Expire	1209600s
Minimum (neg-cache TTL)	86400s

📋 Registration#

WHOIS fetched 2026-10-14 10:13:50

Field	Value
Registrar	CSC Digital Brand Service, Inc
Registered	2010-11-08
Expires	2026-11-30 (42d)

🔗 Same registrant#

3 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
bankingrebels.dk	CSC Digital Brand Service, Inc
faktureremig.dk	CSC Digital Brand Service, Inc
segoria.dk	CSC Digital Brand Service, Inc

📋 WHOIS#

⏱️ Lookup Timing#

30ms

50ms

42ms

AAAA

39ms

TXT

253ms

CAA

43ms

HTTPS

48ms

TLSA

366ms

SOA

54ms

MTA-STS

62ms

DNSSEC

114ms

SRV

90ms

Total

1328ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-01 05:09:56	3401ms	4 NS 3 A 6 MX	🔓 Insecure
2026-09-01 00:56:46	3334ms	4 NS 3 A 6 MX	🔓 Insecure
2026-08-31 16:53:38	3317ms	4 NS 3 A 6 MX	🔓 Insecure
2026-08-28 09:17:36	901ms	4 NS 3 A 6 MX	🔓 Insecure
2026-07-02 15:26:01	4725ms	4 NS 3 A 6 MX	🔓 Insecure
2026-06-18 06:54:53 shown	1328ms	4 NS 3 A 6 MX	🔓 Insecure