kupper.dev - dns.ninja

`kupper.dev`

DNSSEC	⚠️ Not signed
A	18.67.162.20
		PTR	`server-18-67-162-20.gru1.r.cloudfront.net`
A	18.67.162.48
A	18.67.162.51
A	18.67.162.93
NS	`ns-1084.awsdns-07.org` ⭐
		A	2600:9000:5304:3c00::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1084.awsdns-07.org`
		A	205.251.196.60^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1084.awsdns-07.org`
NS	`ns-1696.awsdns-20.co.uk`
		A	2600:9000:5306:a000::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1696.awsdns-20.co.uk`
		A	205.251.198.160^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1696.awsdns-20.co.uk`
NS	`ns-212.awsdns-26.com`
		A	2600:9000:5300:d400::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-212.awsdns-26.com`
		A	205.251.192.212^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-212.awsdns-26.com`
NS	`ns-955.awsdns-55.net`
		A	2600:9000:5303:bb00::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-955.awsdns-55.net`
		A	205.251.195.187^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-955.awsdns-55.net`
MX	`mail.protonmail.ch` ⭐
		A	176.119.200.128^{🇨🇭 Proton176.119.200.0/24}
			PTR	`mail.protonmail.ch`
		A	185.70.42.128^{🇨🇭 Proton185.70.42.0/24}
			PTR	`mail.protonmail.ch`
		A	185.205.70.128^{🇫🇷 Proton185.205.70.0/24}
			PTR	`mail.protonmail.ch`
MX	`mailsec.protonmail.ch`⁽²⁰⁾
		A	176.119.200.129^{🇨🇭 Proton176.119.200.0/24}
			PTR	`mailsec.protonmail.ch`
		A	185.70.42.129^{🇨🇭 Proton185.70.42.0/24}
			PTR	`mailsec.protonmail.ch`
		A	185.205.70.129^{🇫🇷 Proton185.205.70.0/24}
			PTR	`mailsec.protonmail.ch`
TXT	`protonmail-verification=d735cade84422284e0372305f99d7e084847c750`
SOA	`ns-1084.awsdns-07.org`awsdns-hostmaster@amazon.com serial=1

`dev`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns-tld1.charlestonroadregistry.com` ⭐
	NS	`ns-tld2.charlestonroadregistry.com`
	NS	`ns-tld3.charlestonroadregistry.com`
	NS	`ns-tld4.charlestonroadregistry.com`
	NS	`ns-tld5.charlestonroadregistry.com`
	SOA	`ns-tld1.charlestonroadregistry.com`cloud-dns-hostmaster@google.com serial=1

🔒 HSTS Preload (+subdomains)

Same first word

kupper.se

kupper.dev

kupper.pl

kupper.co

kupper.de

kupper.ch

kupper.net

kupper.be

kupper.com.br

kupper.eu

kupper.com

kupper.nl

kupper.gmbh

kupper.ag

Similar names

prepuk.co.uk

purepk.org

kepurp.com

prepuk.com

upkepr.com

purepk.com

euprkp.com

perkup.coffee

upperk.com

kuperp.com

perkup.com.au

prepuk.hu

kruppe.ru

DNS History

94 records (10 active, 84 former)

●NSns-1084.awsdns-07.org2026-02-16 → 2026-08-07 · 2 obs

● 2026-02-16 10:13:50
● 2026-08-07 18:08:06

●NSns-1696.awsdns-20.co.uk2026-02-16 → 2026-08-07 · 2 obs

● 2026-02-16 10:13:50
● 2026-08-07 18:08:06

●NSns-212.awsdns-26.com2026-02-16 → 2026-08-07 · 2 obs

● 2026-02-16 10:13:50
● 2026-08-07 18:08:06

●NSns-955.awsdns-55.net2026-02-16 → 2026-08-07 · 2 obs

● 2026-02-16 10:13:50
● 2026-08-07 18:08:06

●MXmail.protonmail.ch2026-02-16 → 2026-08-07 · 2 obs

● 2026-02-16 10:13:50
● 2026-08-07 18:08:06

●MXmailsec.protonmail.ch2026-02-16 → 2026-08-07 · 2 obs

● 2026-02-16 10:13:50
● 2026-08-07 18:08:06

○A13.224.125.1292026-06-17 → 2026-07-27 · 12 obs

○ 2026-06-15 11:44:28
● 2026-06-17 01:07:24
○ 2026-06-17 02:08:12
● 2026-06-17 02:49:28
○ 2026-06-17 05:35:20
○ 2026-06-17 06:22:30
● 2026-06-17 06:57:56
● 2026-06-17 14:25:06
○ 2026-06-17 15:06:32
● 2026-07-27 11:26:16
○ 2026-07-27 17:02:50
○ 2026-08-07 18:08:06

○A13.224.125.212026-06-17 → 2026-07-27 · 12 obs

○A13.224.125.242026-06-17 → 2026-07-27 · 12 obs

○A13.224.125.842026-06-17 → 2026-07-27 · 12 obs

○A13.226.238.1072026-02-19 → 2026-08-07 · 29 obs

○ 2026-02-16 10:13:50
● 2026-02-19 16:15:06
○ 2026-02-19 18:32:06
○ 2026-02-20 05:10:48
● 2026-02-20 05:52:08
○ 2026-02-20 08:23:02
○ 2026-06-24 21:35:20
● 2026-06-26 06:31:22
○ 2026-06-27 05:53:16
● 2026-06-28 14:08:12
○ 2026-06-30 16:36:56
○ 2026-07-05 06:51:00
● 2026-07-09 08:50:48
○ 2026-07-10 13:20:16
● 2026-07-11 11:59:58
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● 2026-07-12 03:16:42
○ 2026-07-12 03:59:16
● 2026-08-03 10:40:44
○ 2026-08-03 13:39:12
● 2026-08-03 16:48:12
○ 2026-08-03 17:28:08
● 2026-08-05 05:10:48
○ 2026-08-05 08:52:36
● 2026-08-06 16:37:52
○ 2026-08-07 02:57:52
● 2026-08-07 05:13:32
○ 2026-08-07 05:43:54
○ 2026-08-07 18:08:06

○A13.226.238.762026-02-19 → 2026-08-07 · 29 obs

○A13.226.238.782026-02-19 → 2026-08-07 · 29 obs

○A13.226.238.832026-02-19 → 2026-08-07 · 29 obs

○A13.227.231.1172026-03-22 → 2026-07-28 · 10 obs

○ 2026-03-14 17:30:10
● 2026-03-22 10:49:56
○ 2026-03-22 12:12:52
● 2026-07-25 19:39:58
○ 2026-07-25 21:48:06
● 2026-07-27 08:17:06
○ 2026-07-27 11:26:16
● 2026-07-28 09:58:36
○ 2026-07-28 18:04:28
○ 2026-08-07 18:08:06

○A13.227.231.1182026-03-22 → 2026-07-28 · 10 obs

○A13.227.231.712026-03-22 → 2026-07-28 · 10 obs

○A13.227.231.782026-03-22 → 2026-07-28 · 10 obs

○A13.249.231.1022026-05-27 → 2026-05-30 · 10 obs

○ 2026-05-27 09:43:44
● 2026-05-27 10:39:44
○ 2026-05-27 22:11:02
○ 2026-05-28 20:42:00
● 2026-05-28 23:36:08
○ 2026-05-29 01:49:22
○ 2026-05-30 04:19:00
● 2026-05-30 04:53:08
○ 2026-05-30 05:48:42
○ 2026-08-07 18:08:06

○A13.249.231.512026-05-27 → 2026-05-30 · 10 obs

○A13.249.231.612026-05-27 → 2026-05-30 · 10 obs

○A13.249.231.852026-05-27 → 2026-05-30 · 10 obs

○A13.33.82.262026-04-24 → 2026-08-02 · 19 obs

○ 2026-04-21 15:21:28
● 2026-04-24 03:49:00
○ 2026-04-24 05:00:20
○ 2026-04-25 12:13:00
● 2026-04-25 14:16:54
● 2026-04-25 20:15:46
○ 2026-04-26 02:13:18
○ 2026-04-28 16:12:36
● 2026-04-28 19:48:32
○ 2026-04-29 03:34:08
○ 2026-05-05 00:24:46
● 2026-05-05 08:00:18
○ 2026-05-05 12:15:42
○ 2026-05-10 00:11:44
● 2026-05-10 02:12:10
○ 2026-05-10 04:38:14
● 2026-08-02 16:27:28
○ 2026-08-02 18:10:02
○ 2026-08-07 18:08:06

○A13.33.82.472026-04-24 → 2026-08-02 · 19 obs

○A13.33.82.572026-04-24 → 2026-08-02 · 19 obs

○A13.33.82.982026-04-24 → 2026-08-02 · 19 obs

○A13.35.107.1042026-07-13 → 2026-08-02 · 44 obs

○ 2026-07-13 10:16:56
● 2026-07-13 16:47:54
○ 2026-07-14 01:00:16
● 2026-07-14 04:09:26
○ 2026-07-14 09:48:02
● 2026-07-14 12:33:30
○ 2026-07-14 15:30:58
● 2026-07-14 23:54:50
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● 2026-07-15 12:33:06
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● 2026-07-20 17:38:52
○ 2026-07-20 20:23:26
● 2026-07-21 13:00:30
○ 2026-07-21 14:06:50
● 2026-07-22 00:43:04
○ 2026-07-22 02:49:42
● 2026-07-22 07:39:30
○ 2026-07-22 08:11:48
● 2026-07-23 05:45:12
○ 2026-07-23 06:30:18
● 2026-07-25 11:54:56
○ 2026-07-25 14:31:14
● 2026-07-25 18:14:58
○ 2026-07-25 19:39:58
● 2026-07-25 21:48:06
○ 2026-07-26 00:43:00
● 2026-07-26 04:02:50
○ 2026-07-26 16:37:32
● 2026-07-28 07:26:54
○ 2026-07-28 09:58:36
● 2026-07-29 05:17:00
○ 2026-07-29 07:24:18
● 2026-07-29 08:00:20
○ 2026-07-29 17:39:46
● 2026-07-29 19:52:26
○ 2026-07-30 01:30:08
● 2026-07-30 02:21:22
○ 2026-07-30 08:38:28
● 2026-07-31 21:12:02
○ 2026-08-01 00:01:02
● 2026-08-02 05:16:58
○ 2026-08-02 07:19:52
○ 2026-08-07 18:08:06

○A13.35.107.332026-07-13 → 2026-08-02 · 44 obs

○A13.35.107.422026-07-13 → 2026-08-02 · 44 obs

○A13.35.107.892026-07-13 → 2026-08-02 · 44 obs

○A18.239.168.1272026-03-09 → 2026-05-20 · 19 obs

○ 2026-03-08 06:29:52
● 2026-03-09 00:36:26
○ 2026-03-09 02:59:28
○ 2026-04-20 17:15:26
● 2026-04-20 18:26:04
○ 2026-04-21 00:16:46
● 2026-04-21 08:18:26
○ 2026-04-21 15:21:28
○ 2026-05-10 14:34:06
● 2026-05-10 17:22:18
○ 2026-05-10 22:25:52
○ 2026-05-14 22:56:54
● 2026-05-15 02:25:28
○ 2026-05-15 06:25:48
○ 2026-05-19 20:26:44
● 2026-05-20 02:38:54
● 2026-05-20 08:44:02
○ 2026-05-20 11:10:48
○ 2026-08-07 18:08:06

○A18.239.168.382026-03-09 → 2026-05-20 · 19 obs

○A18.239.168.452026-03-09 → 2026-05-20 · 19 obs

○A18.239.168.572026-03-09 → 2026-05-20 · 19 obs

●A18.67.162.202026-06-10 → 2026-08-07 · 90 obs

○ 2026-06-10 13:20:30
● 2026-06-10 19:55:52
○ 2026-06-10 21:11:32
● 2026-06-10 22:07:24
● 2026-06-11 03:18:02
○ 2026-06-11 10:14:10
○ 2026-06-15 11:44:28
● 2026-06-30 23:25:58
○ 2026-07-01 18:39:12
○ 2026-07-02 23:55:56
● 2026-07-03 13:11:28
● 2026-07-05 09:31:50
○ 2026-07-07 17:56:26
● 2026-07-08 10:57:50
● 2026-07-12 03:59:16
○ 2026-07-12 23:04:14
● 2026-07-13 04:35:04
○ 2026-07-13 10:16:56
● 2026-07-14 10:24:34
○ 2026-07-14 12:01:08
● 2026-07-14 15:30:58
○ 2026-07-14 23:54:50
● 2026-07-15 02:16:30
○ 2026-07-15 07:26:48
● 2026-07-15 09:35:04
○ 2026-07-15 12:33:06
● 2026-07-15 13:32:04
○ 2026-07-16 03:50:24
● 2026-07-16 06:57:56
○ 2026-07-16 10:21:10
● 2026-07-16 11:10:02
○ 2026-07-16 17:40:06
● 2026-07-16 19:13:00
○ 2026-07-16 20:47:08
● 2026-07-16 22:40:44
○ 2026-07-20 01:59:08
● 2026-07-20 03:14:56
○ 2026-07-20 17:38:52
● 2026-07-20 20:23:26
○ 2026-07-21 10:13:46
● 2026-07-21 11:01:12
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● 2026-07-21 14:06:50
○ 2026-07-22 00:43:04
● 2026-07-22 02:49:42
○ 2026-07-22 07:39:30
● 2026-07-22 08:11:48
○ 2026-07-22 14:50:26
● 2026-07-22 17:11:12
○ 2026-07-23 01:16:28
● 2026-07-23 11:14:48
○ 2026-07-23 21:02:48
● 2026-07-24 00:06:12
○ 2026-07-24 00:52:02
● 2026-07-24 01:37:00
○ 2026-07-24 04:57:42
● 2026-07-28 02:47:32
○ 2026-07-28 06:18:54
● 2026-07-30 20:08:38
○ 2026-07-31 16:14:42
● 2026-07-31 16:59:48
○ 2026-07-31 21:12:02
● 2026-08-01 00:01:02
○ 2026-08-01 06:09:40
● 2026-08-01 08:07:42
○ 2026-08-01 22:00:06
● 2026-08-01 22:33:16
○ 2026-08-02 05:16:58
● 2026-08-02 07:19:52
○ 2026-08-02 13:16:20
● 2026-08-02 18:10:02
○ 2026-08-02 21:45:58
● 2026-08-02 22:32:04
○ 2026-08-03 00:19:34
● 2026-08-03 00:57:08
○ 2026-08-03 10:40:44
● 2026-08-03 13:39:12
○ 2026-08-03 16:48:12
● 2026-08-03 17:28:08
○ 2026-08-04 06:37:00
● 2026-08-04 09:55:04
○ 2026-08-04 14:56:24
● 2026-08-04 15:47:46
○ 2026-08-05 05:10:48
● 2026-08-05 11:06:52
○ 2026-08-06 16:37:52
● 2026-08-07 02:57:52
○ 2026-08-07 05:13:32
● 2026-08-07 05:43:54
● 2026-08-07 18:08:06

●A18.67.162.482026-06-10 → 2026-08-07 · 90 obs

●A18.67.162.512026-06-10 → 2026-08-07 · 90 obs

●A18.67.162.932026-06-10 → 2026-08-07 · 90 obs

○A18.67.233.1082026-05-28 → 2026-06-02 · 17 obs

○ 2026-05-27 22:11:02
● 2026-05-28 16:27:08
● 2026-05-28 18:36:12
○ 2026-05-28 20:42:00
○ 2026-05-29 17:43:04
● 2026-05-29 19:50:00
○ 2026-05-29 21:41:24
○ 2026-05-31 16:51:34
● 2026-05-31 17:36:18
○ 2026-05-31 19:31:20
○ 2026-06-01 21:27:42
● 2026-06-02 05:08:32
● 2026-06-02 10:12:52
○ 2026-06-02 12:04:10
● 2026-06-02 13:19:06
○ 2026-06-02 14:28:44
○ 2026-08-07 18:08:06

○A18.67.233.142026-05-28 → 2026-06-02 · 17 obs

○A18.67.233.712026-05-28 → 2026-06-02 · 17 obs

○A18.67.233.752026-05-28 → 2026-06-02 · 17 obs

○A3.161.193.42026-03-31 → 2026-07-30 · 29 obs

○ 2026-03-30 02:14:18
● 2026-03-31 22:28:12
○ 2026-04-01 00:12:56
○ 2026-04-01 04:01:30
● 2026-04-01 14:32:16
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○ 2026-06-18 01:51:58
● 2026-06-19 20:37:12
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● 2026-06-22 15:50:24
○ 2026-06-23 08:03:44
○ 2026-06-27 16:25:46
● 2026-06-28 13:34:50
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● 2026-06-29 22:04:30
○ 2026-06-30 00:33:50
● 2026-07-28 06:18:54
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● 2026-07-28 18:04:28
○ 2026-07-28 22:49:22
● 2026-07-29 07:24:18
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● 2026-07-29 17:39:46
○ 2026-07-29 19:52:26
● 2026-07-30 01:30:08
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● 2026-07-30 08:38:28
○ 2026-07-30 16:24:58
○ 2026-08-07 18:08:06

○A3.161.193.612026-03-31 → 2026-07-30 · 29 obs

○A3.161.193.762026-03-31 → 2026-07-30 · 29 obs

○A3.161.193.962026-03-31 → 2026-07-30 · 29 obs

○A3.162.20.232026-02-23 → 2026-05-29 · 10 obs

○ 2026-02-21 05:48:24
● 2026-02-23 09:40:10
○ 2026-02-23 10:34:32
○ 2026-04-04 04:22:06
● 2026-04-04 11:01:14
○ 2026-04-04 19:19:38
○ 2026-05-29 01:49:22
● 2026-05-29 02:43:22
○ 2026-05-29 03:36:40
○ 2026-08-07 18:08:06

○A3.162.20.252026-02-23 → 2026-05-29 · 10 obs

○A3.162.20.472026-02-23 → 2026-05-29 · 10 obs

○A3.162.20.512026-02-23 → 2026-05-29 · 10 obs

○A3.162.247.112026-03-29 → 2026-06-10 · 19 obs

○ 2026-03-27 21:24:12
● 2026-03-29 04:59:26
○ 2026-03-29 14:00:38
○ 2026-03-29 22:40:38
● 2026-03-30 00:13:50
○ 2026-03-30 02:14:18
○ 2026-04-09 19:28:40
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● 2026-04-29 03:34:08
○ 2026-04-29 15:46:00
○ 2026-06-10 05:05:12
● 2026-06-10 13:20:30
○ 2026-06-10 19:55:52
○ 2026-08-07 18:08:06

○A3.162.247.1102026-03-29 → 2026-06-10 · 19 obs

○A3.162.247.62026-03-29 → 2026-06-10 · 19 obs

○A3.162.247.962026-03-29 → 2026-06-10 · 19 obs

○A3.163.139.382026-04-04 → 2026-04-04 · 4 obs

○ 2026-04-01 20:17:56
● 2026-04-04 00:13:58
○ 2026-04-04 01:15:30
○ 2026-08-07 18:08:06

○A3.163.139.472026-04-04 → 2026-04-04 · 4 obs

○ 2026-04-01 20:17:56
● 2026-04-04 00:13:58
○ 2026-04-04 01:15:30
○ 2026-08-07 18:08:06

○A3.163.139.502026-04-04 → 2026-04-04 · 4 obs

○ 2026-04-01 20:17:56
● 2026-04-04 00:13:58
○ 2026-04-04 01:15:30
○ 2026-08-07 18:08:06

○A3.163.139.582026-04-04 → 2026-04-04 · 4 obs

○ 2026-04-01 20:17:56
● 2026-04-04 00:13:58
○ 2026-04-04 01:15:30
○ 2026-08-07 18:08:06

○A3.164.206.1172026-03-25 → 2026-07-16 · 31 obs

○ 2026-03-22 15:11:12
● 2026-03-25 02:40:50
● 2026-03-25 07:35:48
○ 2026-03-25 11:10:08
○ 2026-03-25 21:23:16
● 2026-03-25 23:11:06
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● 2026-03-26 07:43:48
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● 2026-03-27 14:39:52
○ 2026-03-27 21:24:12
● 2026-07-11 19:33:08
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● 2026-07-12 23:04:14
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○A3.164.206.322026-03-25 → 2026-07-16 · 31 obs

○A3.164.206.482026-03-25 → 2026-07-16 · 31 obs

○A3.164.206.802026-03-25 → 2026-07-16 · 31 obs

○A3.168.147.1032026-02-16 → 2026-08-05 · 57 obs

● 2026-02-16 10:13:50
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○A3.168.147.1042026-02-16 → 2026-08-05 · 57 obs

○A3.168.147.492026-02-16 → 2026-08-05 · 57 obs

○A3.168.147.662026-02-16 → 2026-08-05 · 57 obs

○A3.169.149.1182026-05-30 → 2026-05-31 · 10 obs

○ 2026-05-29 21:41:24
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○A3.169.149.452026-05-30 → 2026-05-31 · 10 obs

○A3.169.149.582026-05-30 → 2026-05-31 · 10 obs

○A3.169.149.652026-05-30 → 2026-05-31 · 10 obs

○A3.170.185.462026-05-19 → 2026-07-02 · 18 obs

○ 2026-05-19 04:59:44
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○A3.170.185.592026-05-19 → 2026-07-02 · 18 obs

○A3.170.185.762026-05-19 → 2026-07-02 · 18 obs

○A3.170.185.972026-05-19 → 2026-07-02 · 18 obs

○A3.174.59.382026-04-06 → 2026-07-27 · 36 obs

○ 2026-04-04 19:19:38
● 2026-04-06 01:50:06
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○A3.174.59.702026-04-06 → 2026-07-27 · 36 obs

○A3.174.59.782026-04-06 → 2026-07-27 · 36 obs

○A3.174.59.932026-04-06 → 2026-07-27 · 36 obs

○A3.174.83.272026-05-26 → 2026-06-08 · 19 obs

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○A3.174.83.312026-05-26 → 2026-06-08 · 19 obs

○A3.174.83.562026-05-26 → 2026-06-08 · 19 obs

○A3.174.83.592026-05-26 → 2026-06-08 · 19 obs

○A3.175.14.162026-04-09 → 2026-04-19 · 18 obs

○ 2026-04-06 02:28:26
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○A3.175.14.282026-04-09 → 2026-04-19 · 18 obs

○A3.175.14.292026-04-09 → 2026-04-19 · 18 obs

○A3.175.14.642026-04-09 → 2026-04-19 · 18 obs

○A52.222.177.122026-02-19 → 2026-07-16 · 21 obs

○ 2026-02-19 16:15:06
● 2026-02-19 18:32:06
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○A52.222.177.522026-02-19 → 2026-07-16 · 21 obs

○A52.222.177.532026-02-19 → 2026-07-16 · 21 obs

○A52.222.177.612026-02-19 → 2026-07-16 · 21 obs

○A52.85.61.612026-03-08 → 2026-03-14 · 9 obs

○ 2026-02-23 10:34:32
● 2026-03-08 00:11:22
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○A52.85.61.652026-03-08 → 2026-03-14 · 9 obs

○A52.85.61.972026-03-08 → 2026-03-14 · 9 obs

○A52.85.61.992026-03-08 → 2026-03-14 · 9 obs

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dev	ns-tld2.charlestonroadregistry.com, ns-tld1.charlestonroadregistry.com, ns-tld5.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com...	-
kupper.dev	ns-212.awsdns-26.com, ns-955.awsdns-55.net, ns-1084.awsdns-07.org, ns-1696.awsdns-20.co.uk	-

✅ Authoritative Response

Server:205.251.192.212

NS records: ns-212.awsdns-26.com, ns-955.awsdns-55.net, ns-1084.awsdns-07.org, ns-1696.awsdns-20.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for kupper.dev (unsigned zone)

⏱️ Timing

Total: 1242ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`13.226.238.107, 13.226.238.78...`
NS	4	`ns-1084.awsdns-07.org, ns-1696.awsdns-20.co.uk...`
MX	2	`mail.protonmail.ch (pri: 10), mailsec.protonmail.ch (pri: 20)`
TXT	1	`protonmail-verification=d735cade84422284`
SOA	1	`ns-1084.awsdns-07.org awsdns-hostmaster.`

Analysis

IP Addresses

kupper.dev points to the four IP addresses 18.67.162.20, 18.67.162.48, 18.67.162.51 and 18.67.162.93.

Additional host names — collabg.org, www.nuvme.com.br, d4akj3jh4tz7w.cloudfront.net and two others — share IP numbers with kupper.dev.

Name Servers

kupper.dev has four authoritative name servers: ns-212.awsdns-26.com, ns-955.awsdns-55.net, ns-1084.awsdns-07.org and ns-1696.awsdns-20.co.uk.

At least some of kupper.dev's name servers are shared with other domains, for example mountaintownfloralandgifts.com, phillipsonfamily.com, hanarikoumuten.com and two more.

Four hostnames, each resolving to a pair of IP addresses: ns-212.awsdns-26.com directs to 205.251.192.212 and 2600:9000:5300:d400::1; ns-955.awsdns-55.net directs to 205.251.195.187 and 2600:9000:5303:bb00::1; ns-1084.awsdns-07.org directs to 205.251.196.60 and 2600:9000:5304:3c00::1; ns-1696.awsdns-20.co.uk directs to 205.251.198.160 and 2600:9000:5306:a000::1.

Mail Servers

kupper.dev has two mail servers: mail.protonmail.ch and mailsec.protonmail.ch.

kupper.dev shares the same mail server setup as other domains, including selfux.tech, egik.hu, secfo.org and two others.

kupper.dev shares mail servers — at least in part — with other domains, including jorgeoyola.com, ctxlaw.com, radheating.com and two others.

The hosts mail.protonmail.ch and mailsec.protonmail.ch both resolve to three IP numbers: mail.protonmail.ch to 176.119.200.128, 185.70.42.128 and 185.205.70.128, and mailsec.protonmail.ch to 176.119.200.129, 185.70.42.129 and 185.205.70.129.