`f-think.com`

DNSSEC	⚠️ Not signed
A	3.167.56.9^{🇺🇸 Amazon3.167.56.0/23}
		PTR	`server-3-167-56-9.iad61.r.cloudfront.net`
A	3.167.56.64^{🇺🇸 Amazon3.167.56.0/23}
A	3.167.56.87^{🇺🇸 Amazon3.167.56.0/23}
A	3.167.56.100^{🇺🇸 Amazon3.167.56.0/23}
NS	`ns-880.awsdns-46.net` ⭐
		A	2600:9000:5303:7000::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-880.awsdns-46.net`
		A	205.251.195.112^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-880.awsdns-46.net`
NS	`ns-1210.awsdns-23.org`
		A	2600:9000:5304:ba00::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1210.awsdns-23.org`
		A	205.251.196.186^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1210.awsdns-23.org`
NS	`ns-1992.awsdns-57.co.uk`
		A	2600:9000:5307:c800::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-1992.awsdns-57.co.uk`
		A	205.251.199.200^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-1992.awsdns-57.co.uk`
NS	`ns-455.awsdns-56.com`
		A	2600:9000:5301:c700::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-455.awsdns-56.com`
		A	205.251.193.199^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-455.awsdns-56.com`
MX	`mail.f-think.com` ⭐
		A	88.198.65.188^{🇩🇪 Hetzner88.198.0.0/16 HETZNER-RZ-NBG-BLK4}
			PTR	`samos.firedesk.nl`
TXT	`google-site-verification=zqiRncebq9-hGj5CbmNyqNiXDcw56e3yRf9h5CCaroM`
SOA	`ns-880.awsdns-46.net`awsdns-hostmaster@amazon.com serial=1

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1771291435

Subdomains

ns03.f-think.com

mail.f-think.com

ns02.f-think.com

Same first word

f-think.net

f-think.com

DNS History

31 records (9 active, 22 former)

○NS2nd.dnsv.jp2015-07-18 → 2016-06-22 · 4 obs

● 2015-07-18 16:28:46
● 2016-06-22 15:01:24
○ 2020-01-05 13:03:08
○ 2026-03-11 04:04:20

○NSdns23.hichina.com2020-01-05 → 2020-01-05 · 4 obs

○ 2016-06-22 15:01:24
● 2020-01-05 13:03:08
○ 2026-02-15 08:23:18
○ 2026-03-11 04:04:20

○NSdns24.hichina.com2020-01-05 → 2020-01-05 · 4 obs

○ 2016-06-22 15:01:24
● 2020-01-05 13:03:08
○ 2026-02-15 08:23:18
○ 2026-03-11 04:04:20

●NSns-1210.awsdns-23.org2026-02-15 → 2026-03-11 · 3 obs

○ 2020-01-05 13:03:08
● 2026-02-15 08:23:18
● 2026-03-11 04:04:20

●NSns-1992.awsdns-57.co.uk2026-02-15 → 2026-03-11 · 3 obs

○ 2020-01-05 13:03:08
● 2026-02-15 08:23:18
● 2026-03-11 04:04:20

●NSns-455.awsdns-56.com2026-02-15 → 2026-03-11 · 3 obs

○ 2020-01-05 13:03:08
● 2026-02-15 08:23:18
● 2026-03-11 04:04:20

●NSns-880.awsdns-46.net2026-02-15 → 2026-03-11 · 3 obs

○ 2020-01-05 13:03:08
● 2026-02-15 08:23:18
● 2026-03-11 04:04:20

○NSns01.f-think.com2015-07-18 → 2016-06-22 · 4 obs

● 2015-07-18 16:28:46
● 2016-06-22 15:01:24
○ 2020-01-05 13:03:08
○ 2026-03-11 04:04:20

○NSns01.fthink.co.jp2015-07-18 → 2016-06-22 · 4 obs

● 2015-07-18 16:28:46
● 2016-06-22 15:01:24
○ 2020-01-05 13:03:08
○ 2026-03-11 04:04:20

●MXmail.f-think.com2015-07-18 → 2026-03-11 · 5 obs

● 2015-07-18 16:28:46
● 2016-06-22 15:01:24
○ 2020-01-05 13:03:08
● 2026-02-15 08:23:18
● 2026-03-11 04:04:20

○A108.138.217.22026-02-15 → 2026-03-11 · 130 obs

○ 2020-01-05 13:03:08
● 2026-02-15 08:23:18
● 2026-02-15 18:36:36
○ 2026-02-15 20:10:38
● 2026-02-15 23:51:40
● 2026-02-16 02:51:00
○ 2026-02-16 03:59:46
○ 2026-02-17 05:55:50
● 2026-02-17 12:06:20
○ 2026-02-18 00:59:46
○ 2026-02-18 12:19:06
● 2026-02-18 17:02:32
● 2026-02-19 11:20:44
○ 2026-02-19 21:19:18
○ 2026-02-20 10:49:50
● 2026-02-20 11:42:18
○ 2026-02-20 12:41:22
● 2026-02-20 17:09:50
○ 2026-02-20 18:48:52
● 2026-02-20 23:51:30
● 2026-02-21 10:09:36
○ 2026-02-21 13:03:26
● 2026-02-21 14:00:30
○ 2026-02-21 16:09:52
● 2026-02-22 00:32:18
○ 2026-02-22 01:17:48
○ 2026-02-22 07:07:30
● 2026-02-22 11:43:26
● 2026-02-22 15:20:54
○ 2026-02-23 01:30:58
○ 2026-02-23 10:14:32
● 2026-02-23 11:04:10
● 2026-02-23 12:03:34
○ 2026-02-23 14:49:22
● 2026-02-23 16:05:22
● 2026-02-23 20:03:06
○ 2026-02-23 20:48:50
● 2026-02-23 22:14:34
● 2026-02-24 23:03:46
○ 2026-02-25 00:13:12
● 2026-02-25 02:03:42
● 2026-02-25 05:04:06
○ 2026-02-25 10:12:16
● 2026-02-25 11:30:58
● 2026-02-25 20:59:06
○ 2026-02-25 23:08:30
○ 2026-02-26 01:53:56
● 2026-02-26 06:03:58
● 2026-02-26 14:09:10
○ 2026-02-26 18:21:24
● 2026-02-26 19:15:06
● 2026-02-26 20:04:06
○ 2026-02-26 21:08:16
● 2026-02-26 22:04:10
● 2026-02-26 23:03:52
○ 2026-02-27 01:02:02
● 2026-02-27 03:29:40
○ 2026-02-27 08:36:44
● 2026-02-27 09:11:50
● 2026-02-27 17:03:46
○ 2026-02-27 21:20:08
○ 2026-02-28 03:34:28
● 2026-02-28 04:08:46
● 2026-02-28 09:03:32
○ 2026-02-28 10:23:32
● 2026-02-28 11:03:30
● 2026-02-28 15:04:08
○ 2026-02-28 16:05:28
● 2026-02-28 17:03:36
○ 2026-02-28 17:40:32
● 2026-02-28 19:03:24
● 2026-02-28 22:33:36
○ 2026-02-28 23:07:12
○ 2026-03-01 07:15:12
● 2026-03-01 08:23:42
○ 2026-03-01 08:57:12
○ 2026-03-01 10:30:06
● 2026-03-01 15:03:56
● 2026-03-01 17:04:00
○ 2026-03-01 17:55:54
● 2026-03-01 22:03:46
● 2026-03-01 23:03:44
○ 2026-03-02 00:57:08
○ 2026-03-02 03:37:26
● 2026-03-02 06:36:36
○ 2026-03-02 09:58:52
● 2026-03-02 11:03:38
● 2026-03-02 23:54:12
○ 2026-03-03 00:39:30
● 2026-03-03 01:49:46
○ 2026-03-03 03:02:42
● 2026-03-03 10:21:08
○ 2026-03-03 20:05:30
● 2026-03-04 01:37:42
● 2026-03-04 05:36:52
○ 2026-03-04 14:27:38
● 2026-03-04 17:41:24
○ 2026-03-04 18:17:10
● 2026-03-04 23:00:24
● 2026-03-05 00:54:10
○ 2026-03-05 08:33:48
● 2026-03-05 17:30:42
○ 2026-03-05 20:00:16
● 2026-03-06 03:44:40
○ 2026-03-06 09:39:36
○ 2026-03-06 19:47:42
● 2026-03-06 23:53:44
● 2026-03-07 02:26:34
○ 2026-03-07 03:53:52
○ 2026-03-07 05:00:24
● 2026-03-07 08:05:20
● 2026-03-07 14:08:02
○ 2026-03-07 18:23:08
○ 2026-03-07 19:43:16
● 2026-03-08 10:04:14
● 2026-03-08 21:32:02
○ 2026-03-08 23:07:46
● 2026-03-09 03:48:28
○ 2026-03-09 07:11:36
○ 2026-03-09 08:34:18
● 2026-03-09 11:29:34
○ 2026-03-09 18:01:38
○ 2026-03-09 20:34:32
● 2026-03-10 05:51:24
● 2026-03-10 15:39:12
○ 2026-03-10 16:36:18
● 2026-03-10 17:15:32
● 2026-03-11 01:17:16
○ 2026-03-11 02:38:40
○ 2026-03-11 04:04:20

○A108.138.217.402026-02-15 → 2026-03-11 · 130 obs

○A108.138.217.572026-02-15 → 2026-03-11 · 130 obs

○A108.138.217.712026-02-15 → 2026-03-11 · 130 obs

○A18.173.219.1082026-02-16 → 2026-02-16 · 5 obs

○ 2026-02-16 02:51:00
● 2026-02-16 03:59:46
● 2026-02-16 07:15:38
○ 2026-02-16 16:49:40
○ 2026-03-11 04:04:20

○A18.173.219.212026-02-16 → 2026-02-16 · 5 obs

○ 2026-02-16 02:51:00
● 2026-02-16 03:59:46
● 2026-02-16 07:15:38
○ 2026-02-16 16:49:40
○ 2026-03-11 04:04:20

○A18.173.219.222026-02-16 → 2026-02-16 · 5 obs

○ 2026-02-16 02:51:00
● 2026-02-16 03:59:46
● 2026-02-16 07:15:38
○ 2026-02-16 16:49:40
○ 2026-03-11 04:04:20

○A18.173.219.722026-02-16 → 2026-02-16 · 5 obs

○ 2026-02-16 02:51:00
● 2026-02-16 03:59:46
● 2026-02-16 07:15:38
○ 2026-02-16 16:49:40
○ 2026-03-11 04:04:20

○A18.65.3.382026-02-15 → 2026-03-11 · 97 obs

○ 2026-02-15 08:23:18
○ 2026-02-15 18:36:36
● 2026-02-15 20:10:38
○ 2026-02-15 23:51:40
○ 2026-02-16 07:15:38
● 2026-02-16 16:49:40
○ 2026-02-16 21:46:38
○ 2026-02-17 12:06:20
● 2026-02-18 00:59:46
○ 2026-02-18 10:37:10
○ 2026-02-19 11:20:44
● 2026-02-19 21:19:18
○ 2026-02-20 10:49:50
○ 2026-02-20 17:09:50
● 2026-02-20 18:48:52
○ 2026-02-20 23:51:30
○ 2026-02-23 12:03:34
● 2026-02-23 14:49:22
○ 2026-02-23 16:05:22
○ 2026-02-23 20:03:06
● 2026-02-23 20:48:50
○ 2026-02-23 22:14:34
○ 2026-02-25 05:04:06
● 2026-02-25 10:12:16
○ 2026-02-25 11:30:58
○ 2026-02-26 00:11:42
● 2026-02-26 01:53:56
○ 2026-02-26 06:03:58
○ 2026-02-26 14:09:10
● 2026-02-26 18:21:24
○ 2026-02-26 19:15:06
○ 2026-02-26 20:04:06
● 2026-02-26 21:08:16
○ 2026-02-26 22:04:10
○ 2026-02-26 23:03:52
● 2026-02-27 01:02:02
○ 2026-02-27 03:29:40
● 2026-02-27 08:36:44
○ 2026-02-27 09:11:50
○ 2026-02-27 21:20:08
● 2026-02-27 22:39:06
○ 2026-02-28 03:34:28
○ 2026-02-28 09:03:32
● 2026-02-28 10:23:32
○ 2026-02-28 11:03:30
○ 2026-02-28 15:04:08
● 2026-02-28 16:05:28
○ 2026-02-28 17:03:36
○ 2026-02-28 23:07:12
● 2026-02-28 23:48:08
● 2026-03-01 07:15:12
○ 2026-03-01 08:23:42
● 2026-03-01 08:57:12
● 2026-03-01 10:30:06
○ 2026-03-01 15:03:56
○ 2026-03-01 17:04:00
● 2026-03-01 17:55:54
○ 2026-03-01 22:03:46
○ 2026-03-02 00:57:08
● 2026-03-02 03:37:26
○ 2026-03-02 06:36:36
○ 2026-03-03 10:21:08
● 2026-03-03 20:05:30
○ 2026-03-04 01:37:42
○ 2026-03-04 05:36:52
● 2026-03-04 14:27:38
○ 2026-03-04 17:41:24
○ 2026-03-05 00:54:10
● 2026-03-05 08:33:48
○ 2026-03-05 17:30:42
● 2026-03-05 20:00:16
○ 2026-03-06 03:44:40
● 2026-03-06 09:39:36
○ 2026-03-06 12:47:26
● 2026-03-06 19:47:42
○ 2026-03-06 23:53:44
○ 2026-03-07 03:53:52
● 2026-03-07 05:00:24
○ 2026-03-07 08:05:20
○ 2026-03-07 18:23:08
● 2026-03-07 19:43:16
○ 2026-03-08 10:04:14
○ 2026-03-08 21:32:02
● 2026-03-08 23:07:46
○ 2026-03-09 03:48:28
○ 2026-03-09 07:11:36
● 2026-03-09 08:34:18
○ 2026-03-09 11:29:34
● 2026-03-09 18:01:38
○ 2026-03-09 20:34:32
○ 2026-03-10 15:39:12
● 2026-03-10 16:36:18
○ 2026-03-10 17:15:32
○ 2026-03-11 01:17:16
● 2026-03-11 02:38:40
○ 2026-03-11 04:04:18
○ 2026-03-11 04:04:20

○A18.65.3.512026-02-15 → 2026-03-11 · 97 obs

○A18.65.3.542026-02-15 → 2026-03-11 · 97 obs

○A18.65.3.702026-02-15 → 2026-03-11 · 97 obs

○A203.145.122.1462015-07-18 → 2016-06-22 · 4 obs

● 2015-07-18 16:28:46
● 2016-06-22 15:01:24
○ 2020-01-05 13:03:08
○ 2026-03-11 04:04:20

●A3.167.56.1002026-02-16 → 2026-03-11 · 72 obs

○ 2026-02-16 16:49:40
● 2026-02-16 21:46:38
● 2026-02-17 05:55:50
○ 2026-02-17 12:06:20
○ 2026-02-18 00:59:46
● 2026-02-18 10:37:10
● 2026-02-18 12:19:06
○ 2026-02-18 17:02:32
○ 2026-02-19 21:19:18
● 2026-02-20 10:49:50
○ 2026-02-20 11:42:18
● 2026-02-20 12:41:22
○ 2026-02-20 17:09:50
○ 2026-02-21 10:09:36
● 2026-02-21 13:03:26
○ 2026-02-21 14:00:30
● 2026-02-21 16:09:52
○ 2026-02-22 00:32:18
● 2026-02-22 01:17:48
● 2026-02-22 07:07:30
○ 2026-02-22 11:43:26
○ 2026-02-22 15:20:54
● 2026-02-23 01:30:58
● 2026-02-23 07:01:54
○ 2026-02-23 10:14:32
○ 2026-02-24 23:03:46
● 2026-02-25 00:13:12
○ 2026-02-25 02:03:42
○ 2026-02-25 20:59:06
● 2026-02-25 23:08:30
● 2026-02-26 00:11:42
○ 2026-02-26 01:53:56
○ 2026-02-27 17:03:46
● 2026-02-27 21:20:08
○ 2026-02-27 22:39:06
● 2026-02-28 03:34:28
○ 2026-02-28 04:08:46
○ 2026-02-28 17:03:36
● 2026-02-28 17:40:32
○ 2026-02-28 19:03:24
○ 2026-02-28 22:33:36
● 2026-02-28 23:07:12
○ 2026-02-28 23:48:08
○ 2026-03-01 23:03:44
● 2026-03-02 00:57:08
○ 2026-03-02 03:37:26
○ 2026-03-02 23:54:12
● 2026-03-03 00:39:30
○ 2026-03-03 01:49:46
● 2026-03-03 03:02:42
○ 2026-03-03 10:21:08
○ 2026-03-04 17:41:24
● 2026-03-04 18:17:10
○ 2026-03-04 23:00:24
○ 2026-03-06 09:39:36
● 2026-03-06 12:47:26
○ 2026-03-06 19:47:42
○ 2026-03-07 02:26:34
● 2026-03-07 03:53:52
○ 2026-03-07 05:00:24
○ 2026-03-07 14:08:02
● 2026-03-07 18:23:08
○ 2026-03-07 19:43:16
○ 2026-03-09 03:48:28
● 2026-03-09 07:11:36
○ 2026-03-09 08:34:18
○ 2026-03-09 18:01:38
● 2026-03-09 20:34:32
○ 2026-03-10 05:51:24
○ 2026-03-11 02:38:40
● 2026-03-11 04:04:18
● 2026-03-11 04:04:20

●A3.167.56.642026-02-16 → 2026-03-11 · 72 obs

●A3.167.56.872026-02-16 → 2026-03-11 · 72 obs

●A3.167.56.92026-02-16 → 2026-03-11 · 72 obs

○A3.173.182.1222026-02-23 → 2026-03-02 · 7 obs

○ 2026-02-23 07:01:54
● 2026-02-23 10:14:32
○ 2026-02-23 11:04:10
○ 2026-03-02 06:36:36
● 2026-03-02 09:58:52
○ 2026-03-02 11:03:38
○ 2026-03-11 04:04:20

○A3.173.182.1252026-02-23 → 2026-03-02 · 7 obs

○ 2026-02-23 07:01:54
● 2026-02-23 10:14:32
○ 2026-02-23 11:04:10
○ 2026-03-02 06:36:36
● 2026-03-02 09:58:52
○ 2026-03-02 11:03:38
○ 2026-03-11 04:04:20

○A3.173.182.172026-02-23 → 2026-03-02 · 7 obs

○ 2026-02-23 07:01:54
● 2026-02-23 10:14:32
○ 2026-02-23 11:04:10
○ 2026-03-02 06:36:36
● 2026-03-02 09:58:52
○ 2026-03-02 11:03:38
○ 2026-03-11 04:04:20

○A3.173.182.412026-02-23 → 2026-03-02 · 7 obs

○ 2026-02-23 07:01:54
● 2026-02-23 10:14:32
○ 2026-02-23 11:04:10
○ 2026-03-02 06:36:36
● 2026-03-02 09:58:52
○ 2026-03-02 11:03:38
○ 2026-03-11 04:04:20

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	g.gtld-servers.net, a.gtld-servers.net, d.gtld-servers.net, e.gtld-servers.net...	-
f-think.com	ns-455.awsdns-56.com, ns-880.awsdns-46.net, ns-1210.awsdns-23.org, ns-1992.awsdns-57.co.uk	1 record

✅ Authoritative Response

Server: 205.251.199.200

NS records: ns-455.awsdns-56.com, ns-880.awsdns-46.net, ns-1210.awsdns-23.org, ns-1992.awsdns-57.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for f-think.com (unsigned zone)

⏱️ Timing

Total: 523ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`3.167.56.64, 3.167.56.87...`
NS	4	`ns-1210.awsdns-23.org, ns-1992.awsdns-57.co.uk...`
MX	1	`mail.f-think.com (pri: 1)`
TXT	1	`google-site-verification=zqiRncebq9-hGj5`
SOA	1	`ns-880.awsdns-46.net awsdns-hostmaster.a`

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (ns-455.awsdns-56.com)

Analysis

Hierarchy

f-think.com is a parent of ns03.f-think.com, mail.f-think.com and ns02.f-think.com.

IP Addresses

f-think.com refers to four IP numbers: 3.167.56.9, 3.167.56.64, 3.167.56.87 and 3.167.56.100.

Other host names, for instance ihbc.or.kr, paulsflowershop.ca, www.lynk.group, bif.jp and d1ou164kvkw022.cloudfront.net share IP numbers with f-think.com.

Name Servers

f-think.com delegates to four name servers: ns-455.awsdns-56.com, ns-880.awsdns-46.net, ns-1210.awsdns-23.org and ns-1992.awsdns-57.co.uk.

f-think.com at least partially shares name servers with other domains, including toddheintz.com, satellitebgan.com, richsamartino.com, attachments5.freshdesk.com and turningtech.info.

Host names with two IP numbers: ns-455.awsdns-56.com points to 2600:9000:5301:c700::1 and 205.251.193.199; ns-880.awsdns-46.net points to 2600:9000:5303:7000::1 and 205.251.195.112; ns-1210.awsdns-23.org points to 2600:9000:5304:ba00::1 and 205.251.196.186; ns-1992.awsdns-57.co.uk points to 2600:9000:5307:c800::1 and 205.251.199.200.

Mail Servers

A single mail server handles f-think.com, mail.f-think.com.

Host name mail.f-think.com resolves to a single IP: 88.198.65.188.

f-think.com - robtex.com

f-think.com

com

Subdomains

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`f-think.com`

`com`