optimalcheckout.dk DNS records

🖥️ Nameservers4 records 20ms

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 Records3 records 92ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
63.33.224.205	60s	ec2-63-33-224-205.eu-west-1.compute.amazonaws.com	AS16509	Amazon.com, Inc.	63.32.0.0/14	🇮🇪 Ireland	Dublin
176.34.117.32	60s	ec2-176-34-117-32.eu-west-1.compute.amazonaws.com	AS16509	Amazon.com, Inc.	176.34.0.0/16	🇮🇪 Ireland	Dublin
54.76.246.21	60s	ec2-54-76-246-21.eu-west-1.compute.amazonaws.com	AS16509	Amazon.com, Inc.	54.64.0.0/12	🇮🇪 Ireland	Dublin

📧 MX Records6 records 20ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	600s	mxz1.klarna.com	52.30.236.203	ec2-52-30-236-203.eu-west-1.compute.amazonaws.com	AS16509 Amazon.com, Inc.
10	600s	mxz2.klarna.com	54.73.174.245	ec2-54-73-174-245.eu-west-1.compute.amazonaws.com	AS16509 Amazon.com, Inc.
10	600s	mxz3.klarna.com	3.73.181.240	ec2-3-73-181-240.eu-central-1.compute.amazonaws.com	AS16509 Amazon.com, Inc.
20	600s	mxz5.klarna.com	—	—	—
20	600s	mxz6.klarna.com	—	—	—
20	600s	mxz4.klarna.com	35.156.176.213	ec2-35-156-176-213.eu-central-1.compute.amazonaws.com	AS16509 Amazon.com, Inc.

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records1 records 78ms

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 Records3 records 84ms

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

🔗 TLSA / DANE

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

🔐 DNSSEC274ms

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

🏷️ SOA7ms

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

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

20ms

A

92ms

MX

20ms

AAAA

8ms

TXT

78ms

CAA

84ms

HTTPS

94ms

TLSA

277ms

SOA

7ms

MTA-STS

65ms

DNSSEC

274ms

SRV

0ms

Total

3334ms

🕐 Scan History

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