`optimalercheckout.de`

DNSSEC	⚠️ Not signed
A	54.78.220.134^{🇮🇪 Amazon54.78.0.0/16 EC2 DUB prefix}
		PTR	`ec2-54-78-220-134.eu-west-1.compute.amazonaws.com`
A	54.194.90.6^{🇮🇪 Amazon54.194.0.0/16 VPC DUB 54.194.0.0/16}
A	108.128.192.13^{🇮🇪 Amazon108.128.0.0/13 EC2 DUB prefix}
NS	`ns-301.awsdns-37.com` ⭐
		A	2600:9000:5301:2d00::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-301.awsdns-37.com`
		A	205.251.193.45^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-301.awsdns-37.com`
NS	`ns-1059.awsdns-04.org`
		A	2600:9000:5304:2300::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1059.awsdns-04.org`
		A	205.251.196.35^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1059.awsdns-04.org`
NS	`ns-1883.awsdns-43.co.uk`
		A	2600:9000:5307:5b00::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-1883.awsdns-43.co.uk`
		A	205.251.199.91^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-1883.awsdns-43.co.uk`
NS	`ns-568.awsdns-07.net`
		A	2600:9000:5302:3800::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-568.awsdns-07.net`
		A	205.251.194.56^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-568.awsdns-07.net`
MX	`mxz1.klarna.com` ⭐
		A	52.30.236.203^{🇮🇪 Amazon52.30.0.0/15 EC2 DUB prefix}
			PTR	`ec2-52-30-236-203.eu-west-1.compute.amazonaws.com`
MX	`mxz2.klarna.com` ⭐
		A	54.73.174.245^{🇮🇪 Amazon54.73.0.0/16 EC2 DUB prefix}
			PTR	`ec2-54-73-174-245.eu-west-1.compute.amazonaws.com`
MX	`mxz3.klarna.com` ⭐
		A	3.73.181.240^{🇩🇪 Amazon3.64.0.0/12 EC2 FRA Prefix}
			PTR	`ec2-3-73-181-240.eu-central-1.compute.amazonaws.com`
TXT	`v=spf1 include:klarna.com -all`
SOA	`ns-301.awsdns-37.com`awsdns-hostmaster@amazon.com serial=1

`de`

	DNSSEC	🔒 Signed (DS record present)
	NS	`f.nic.de` ⭐
	NS	`a.nic.de`
	NS	`l.de.net` ⚠️ Not in parent delegation
	NS	`n.de.net` ⚠️ Not in parent delegation
	NS	`s.de.net` ⚠️ Not in parent delegation
	NS	`z.nic.de`
	SOA	`f.nic.de`dns-operations@denic.de serial=1777014490

Same first word

optimalercheckout.de

optimalercheckout.at

DNS History

22 records (10 active, 12 former)

●NSns-1059.awsdns-04.org2026-03-17 → 2026-04-24 · 3 obs

○ 2017-05-15 04:46:12
● 2026-03-17 12:03:02
● 2026-04-24 07:14:46

●NSns-1883.awsdns-43.co.uk2026-03-17 → 2026-04-24 · 3 obs

○ 2017-05-15 04:46:12
● 2026-03-17 12:03:02
● 2026-04-24 07:14:46

●NSns-301.awsdns-37.com2026-03-17 → 2026-04-24 · 3 obs

○ 2017-05-15 04:46:12
● 2026-03-17 12:03:02
● 2026-04-24 07:14:46

●NSns-568.awsdns-07.net2026-03-17 → 2026-04-24 · 3 obs

○ 2017-05-15 04:46:12
● 2026-03-17 12:03:02
● 2026-04-24 07:14:46

○NSns1.nameisp.info2015-08-17 → 2017-05-15 · 4 obs

● 2015-08-17 08:59:12
● 2017-05-15 04:46:12
○ 2026-03-17 12:03:02
○ 2026-04-24 07:14:46

○NSns2.nameisp.info2015-08-17 → 2017-05-15 · 4 obs

● 2015-08-17 08:59:12
● 2017-05-15 04:46:12
○ 2026-03-17 12:03:02
○ 2026-04-24 07:14:46

●MXmxz1.klarna.com2026-03-17 → 2026-04-24 · 2 obs

● 2026-03-17 12:03:02
● 2026-04-24 07:14:46

●MXmxz2.klarna.com2026-03-17 → 2026-04-24 · 2 obs

● 2026-03-17 12:03:02
● 2026-04-24 07:14:46

●MXmxz3.klarna.com2026-03-17 → 2026-04-24 · 2 obs

● 2026-03-17 12:03:02
● 2026-04-24 07:14:46

●A108.128.192.132026-04-24 → 2026-04-24 · 3 obs

○ 2026-04-08 09:07:42
● 2026-04-24 02:51:50
● 2026-04-24 07:14:46

○A18.200.64.1212026-03-17 → 2026-03-17 · 4 obs

○ 2017-05-15 04:46:12
● 2026-03-17 12:03:02
○ 2026-04-05 07:32:24
○ 2026-04-24 07:14:46

○A46.137.76.262026-03-17 → 2026-03-17 · 4 obs

○ 2017-05-15 04:46:12
● 2026-03-17 12:03:02
○ 2026-04-05 07:32:24
○ 2026-04-24 07:14:46

○A52.19.248.2402026-04-08 → 2026-04-08 · 4 obs

○ 2026-04-05 07:32:24
● 2026-04-08 09:07:42
○ 2026-04-24 02:51:50
○ 2026-04-24 07:14:46

○A52.208.218.1442026-04-05 → 2026-04-05 · 4 obs

○ 2026-03-17 12:03:02
● 2026-04-05 07:32:24
○ 2026-04-08 09:07:42
○ 2026-04-24 07:14:46

○A52.211.169.432026-04-05 → 2026-04-05 · 4 obs

○ 2026-03-17 12:03:02
● 2026-04-05 07:32:24
○ 2026-04-08 09:07:42
○ 2026-04-24 07:14:46

○A52.31.21.1522026-04-08 → 2026-04-08 · 4 obs

○ 2026-04-05 07:32:24
● 2026-04-08 09:07:42
○ 2026-04-24 02:51:50
○ 2026-04-24 07:14:46

●A54.194.90.62026-04-24 → 2026-04-24 · 3 obs

○ 2026-04-08 09:07:42
● 2026-04-24 02:51:50
● 2026-04-24 07:14:46

○A54.217.137.1412026-04-05 → 2026-04-05 · 4 obs

○ 2026-03-17 12:03:02
● 2026-04-05 07:32:24
○ 2026-04-08 09:07:42
○ 2026-04-24 07:14:46

○A54.246.17.2542026-04-08 → 2026-04-08 · 4 obs

○ 2026-04-05 07:32:24
● 2026-04-08 09:07:42
○ 2026-04-24 02:51:50
○ 2026-04-24 07:14:46

●A54.78.220.1342026-04-24 → 2026-04-24 · 3 obs

○ 2026-04-08 09:07:42
● 2026-04-24 02:51:50
● 2026-04-24 07:14:46

○A63.35.59.392026-03-17 → 2026-03-17 · 4 obs

○ 2017-05-15 04:46:12
● 2026-03-17 12:03:02
○ 2026-04-05 07:32:24
○ 2026-04-24 07:14:46

○A80.76.147.2322015-08-17 → 2017-05-15 · 4 obs

● 2015-08-17 08:59:12
● 2017-05-15 04:46:12
○ 2026-03-17 12:03:02
○ 2026-04-24 07:14:46

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	z.nic.de, a.nic.de, f.nic.de	-
optimalercheckout.de	ns-568.awsdns-07.net, ns-301.awsdns-37.com, ns-1883.awsdns-43.co.uk, ns-1059.awsdns-04.org	-

✅ Authoritative Response

Server:205.251.194.56

NS records: ns-568.awsdns-07.net, ns-301.awsdns-37.com, ns-1883.awsdns-43.co.uk, ns-1059.awsdns-04.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for optimalercheckout.de (unsigned zone)

⏱️ Timing

Total: 1345ms | Queries: -

📄 Records

Type	Count	Sample Data
A	3	`54.78.220.134, 54.194.90.6...`
NS	4	`ns-1059.awsdns-04.org, ns-1883.awsdns-43.co.uk...`
MX	3	`mxz1.klarna.com (pri: 10), mxz2.klarna.com (pri: 10)...`
TXT	1	`v=spf1 include:klarna.com -all`
SOA	1	`ns-301.awsdns-37.com awsdns-hostmaster.a`

Analysis

IP Addresses

Three IP numbers for optimalercheckout.de are 54.78.220.134, 54.194.90.6 and 108.128.192.13.

Other host names, for instance klarna.sg, klarna-checkout.dk, 4smallpayments.website, klarna.life and longtailmachine.com share IP numbers with optimalercheckout.de.

Name Servers

optimalercheckout.de is delegated to four name servers: ns-301.awsdns-37.com, ns-568.awsdns-07.net, ns-1059.awsdns-04.org and ns-1883.awsdns-43.co.uk.

optimalercheckout.de at least partially shares its name servers with other domains, for instance d6uswlx28kkuz.cloudfront.net, classlaundry.com.au, ambanibook11.com, ybyiawngsu.net and d3ca3p28e3i8yf.cloudfront.net.

Host names with two IPs: ns-301.awsdns-37.com points to 2600:9000:5301:2d00::1 and 205.251.193.45; ns-568.awsdns-07.net points to 2600:9000:5302:3800::1 and 205.251.194.56; ns-1059.awsdns-04.org points to 2600:9000:5304:2300::1 and 205.251.196.35; ns-1883.awsdns-43.co.uk points to 2600:9000:5307:5b00::1 and 205.251.199.91.

Mail Servers

optimalercheckout.de is handled by three mail servers: mxz1.klarna.com, mxz2.klarna.com and mxz3.klarna.com.

optimalercheckout.de shares some mail servers with other domains, including fakturakortet.se, payment-network.cz, inspirock.net, betaiingkiarna.net and klarnacheckout.nl.

These mail servers are commonly used with mxz4.klarna.com, mxz6.klarna.com and mxz5.klarna.com.

Host names with one IP number:

mxz1.klarna.com points to: 52.30.236.203.

mxz2.klarna.com points to: 54.73.174.245.

mxz3.klarna.com points to: 3.73.181.240.

optimalercheckout.de - robtex.com