api.bartleby.com - dns.ninja

`api.bartleby.com`

DNSSEC	⚠️ Not signed
A	3.170.42.36^{🇺🇸 Amazon3.170.40.0/22}
		PTR	`server-3-170-42-36.iad61.r.cloudfront.net`
A	3.170.42.63^{🇺🇸 Amazon3.170.40.0/22}
A	3.170.42.67^{🇺🇸 Amazon3.170.40.0/22}
A	3.170.42.92^{🇺🇸 Amazon3.170.40.0/22}

`bartleby.com`

	DNSSEC	⚠️ Not signed
	A	3.167.37.14^{🇺🇸 Amazon3.167.32.0/21}
	A	3.167.37.20^{🇺🇸 Amazon3.167.32.0/21}
	A	3.167.37.41^{🇺🇸 Amazon3.167.32.0/21}
	A	3.167.37.99^{🇺🇸 Amazon3.167.32.0/21}
	NS	`ns-1443.awsdns-52.org` ⭐
	NS	`ns-1563.awsdns-03.co.uk`
	NS	`ns-44.awsdns-05.com`
	NS	`ns-663.awsdns-18.net`
	MX	`aspmx.l.google.com` ⭐
	MX	`alt1.aspmx.l.google.com`⁽⁵⁾
	MX	`alt2.aspmx.l.google.com`⁽⁵⁾
	MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
	MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
	TXT	`MS=ms37443491`
	TXT	`atlassian-domain-verification=XDHtvWctzfZz5dFPy2tEI2x3D1sN1EwUUEzo9EmmtnuAh8p...`
	TXT	`botify-site-verification=WNWNnK3oxQyk4eo62Wkpj4Kb68anV52S`
	TXT	`facebook-domain-verification=cd0p4jbcrovz1p8uazmkvahduqva4c`
	TXT	`google-site-verification=gcZDN7Jlh0L4rSRamS8hp69BT7kQE1o4f36tfOZBjIs`
	TXT	`google-site-verification=if283_BqzxKUiaBzg7TFTuC1rNlnsHAtdH_zi5a_T6Q`
	TXT	`google-site-verification=upx1QcrSllUfo-VOB1xNPArJfjC7h4o3Cy0xrVDIWdE`
	TXT	`slack-domain-verification=b8qsltduJ23SiCOecYw2lTqQVLxe7dnDS7sp1Ipb`
	TXT	`v=spf1 include:mail.zendesk.com include:aspmx.sailthru.com include:_spf.googl...`
	SOA	`ns-1443.awsdns-52.org`awsdns-hostmaster@amazon.com serial=1

WOT: SAFE (91/100)
rank #2288 globally
rank #1203 in the tld
WOT: SAFE (91/100)
📈 Tranco rank: #7,254

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DNS History

78 records (4 active, 74 former)

○A108.138.217.1032026-02-15 → 2026-02-16 · 5 obs

○ 2017-04-01 03:54:42
● 2026-02-15 19:55:12
● 2026-02-16 07:55:42
○ 2026-02-17 22:20:44
○ 2026-08-06 17:49:42

○A108.138.217.512026-02-15 → 2026-02-16 · 5 obs

○ 2017-04-01 03:54:42
● 2026-02-15 19:55:12
● 2026-02-16 07:55:42
○ 2026-02-17 22:20:44
○ 2026-08-06 17:49:42

○A108.138.217.532026-02-15 → 2026-02-16 · 5 obs

○ 2017-04-01 03:54:42
● 2026-02-15 19:55:12
● 2026-02-16 07:55:42
○ 2026-02-17 22:20:44
○ 2026-08-06 17:49:42

○A108.138.217.602026-02-15 → 2026-02-16 · 5 obs

○ 2017-04-01 03:54:42
● 2026-02-15 19:55:12
● 2026-02-16 07:55:42
○ 2026-02-17 22:20:44
○ 2026-08-06 17:49:42

○A108.139.119.1012026-04-13 → 2026-05-17 · 20 obs

○ 2026-04-11 01:45:38
● 2026-04-13 10:33:20
○ 2026-04-13 13:39:38
○ 2026-04-14 12:37:00
● 2026-04-14 14:48:12
○ 2026-04-14 21:08:58
● 2026-04-14 23:14:08
○ 2026-04-15 11:41:00
○ 2026-04-16 13:38:32
● 2026-04-16 16:16:38
● 2026-04-17 04:02:24
○ 2026-04-17 04:43:44
○ 2026-04-18 19:28:08
● 2026-04-19 01:45:54
● 2026-04-19 02:25:06
○ 2026-04-19 13:35:58
○ 2026-05-17 16:41:56
● 2026-05-17 17:13:32
○ 2026-05-17 21:37:38
○ 2026-08-06 17:49:42

○A108.139.119.1112026-04-13 → 2026-05-17 · 20 obs

○A108.139.119.372026-04-13 → 2026-05-17 · 20 obs

○A108.139.119.752026-04-13 → 2026-05-17 · 20 obs

○A108.139.182.1212026-03-29 → 2026-06-11 · 26 obs

○ 2026-03-28 06:52:14
● 2026-03-29 00:10:56
○ 2026-03-29 21:58:24
● 2026-03-30 00:15:14
● 2026-03-30 00:47:38
○ 2026-03-30 08:51:48
○ 2026-05-24 02:44:34
● 2026-05-25 02:28:04
○ 2026-05-25 13:11:18
● 2026-05-26 05:50:36
● 2026-05-27 15:10:50
○ 2026-05-28 07:06:44
○ 2026-05-29 07:07:58
● 2026-05-29 20:46:34
○ 2026-05-31 08:38:08
● 2026-06-01 11:23:08
○ 2026-06-02 02:42:58
○ 2026-06-04 10:09:16
● 2026-06-08 01:14:22
● 2026-06-09 00:19:30
○ 2026-06-10 06:48:12
○ 2026-06-11 03:15:06
● 2026-06-11 03:52:32
● 2026-06-11 04:47:16
○ 2026-06-11 19:48:02
○ 2026-08-06 17:49:42

○A108.139.182.1252026-03-29 → 2026-06-11 · 26 obs

○A108.139.182.842026-03-29 → 2026-06-11 · 26 obs

○A108.139.182.92026-03-29 → 2026-06-11 · 26 obs

○A108.156.85.1172026-07-27 → 2026-07-27 · 4 obs

○ 2026-07-26 17:01:02
● 2026-07-27 08:28:54
○ 2026-07-27 18:29:02
○ 2026-08-06 17:49:42

○A108.156.85.662026-07-27 → 2026-07-27 · 4 obs

○ 2026-07-26 17:01:02
● 2026-07-27 08:28:54
○ 2026-07-27 18:29:02
○ 2026-08-06 17:49:42

○A108.156.85.82026-07-27 → 2026-07-27 · 4 obs

○ 2026-07-26 17:01:02
● 2026-07-27 08:28:54
○ 2026-07-27 18:29:02
○ 2026-08-06 17:49:42

○A108.156.85.992026-07-27 → 2026-07-27 · 4 obs

○ 2026-07-26 17:01:02
● 2026-07-27 08:28:54
○ 2026-07-27 18:29:02
○ 2026-08-06 17:49:42

○A108.158.173.1182026-04-29 → 2026-08-05 · 65 obs

○ 2026-04-25 14:40:54
● 2026-04-29 09:35:46
○ 2026-04-29 10:33:12
○ 2026-06-13 13:56:20
● 2026-06-13 14:36:08
○ 2026-06-13 18:56:58
○ 2026-06-14 01:27:04
● 2026-06-14 02:51:50
○ 2026-06-14 04:11:30
○ 2026-06-16 03:40:42
● 2026-06-16 06:57:58
○ 2026-06-16 09:16:18
● 2026-06-30 22:45:38
○ 2026-07-01 15:56:02
● 2026-07-02 01:19:12
○ 2026-07-03 00:17:40
● 2026-07-03 12:38:10
○ 2026-07-03 16:02:46
● 2026-07-03 21:15:34
○ 2026-07-04 05:56:48
● 2026-07-04 06:31:20
○ 2026-07-04 07:08:06
● 2026-07-04 09:27:06
○ 2026-07-04 22:01:36
● 2026-07-05 06:49:56
○ 2026-07-07 18:04:38
● 2026-07-07 23:48:36
○ 2026-07-08 04:33:10
● 2026-07-08 12:29:08
○ 2026-07-09 04:41:08
● 2026-07-09 11:33:42
○ 2026-07-10 02:01:16
● 2026-07-10 03:54:26
○ 2026-07-10 14:38:54
● 2026-07-10 15:55:20
○ 2026-07-11 07:19:44
● 2026-07-11 07:53:46
○ 2026-07-13 05:07:46
● 2026-07-13 06:10:40
○ 2026-07-13 20:48:48
● 2026-07-13 22:30:48
○ 2026-07-13 23:56:00
● 2026-07-14 22:20:28
○ 2026-07-20 04:40:30
● 2026-07-20 06:26:22
○ 2026-07-20 19:21:30
● 2026-07-21 03:19:08
○ 2026-07-21 08:30:02
● 2026-07-21 10:22:52
○ 2026-07-21 15:33:36
● 2026-07-21 16:44:52
○ 2026-07-23 05:37:02
● 2026-07-23 14:31:32
○ 2026-07-23 19:59:40
● 2026-07-28 02:53:14
○ 2026-07-28 06:41:56
● 2026-07-30 19:02:52
○ 2026-07-31 00:12:22
● 2026-07-31 01:38:02
○ 2026-07-31 11:55:16
● 2026-07-31 16:16:26
○ 2026-08-05 05:09:38
● 2026-08-05 08:56:02
○ 2026-08-06 05:12:26
○ 2026-08-06 17:49:42

○A108.158.173.312026-04-29 → 2026-08-05 · 65 obs

○A108.158.173.412026-04-29 → 2026-08-05 · 65 obs

○A108.158.173.552026-04-29 → 2026-08-05 · 65 obs

○A13.249.228.1262026-07-26 → 2026-07-28 · 8 obs

○ 2026-07-26 04:27:24
● 2026-07-26 13:55:44
○ 2026-07-26 15:23:22
● 2026-07-28 00:18:14
○ 2026-07-28 02:53:14
● 2026-07-28 15:24:22
○ 2026-07-28 20:12:58
○ 2026-08-06 17:49:42

○A13.249.228.822026-07-26 → 2026-07-28 · 8 obs

○ 2026-07-26 04:27:24
● 2026-07-26 13:55:44
○ 2026-07-26 15:23:22
● 2026-07-28 00:18:14
○ 2026-07-28 02:53:14
● 2026-07-28 15:24:22
○ 2026-07-28 20:12:58
○ 2026-08-06 17:49:42

○A13.249.228.902026-07-26 → 2026-07-28 · 8 obs

○ 2026-07-26 04:27:24
● 2026-07-26 13:55:44
○ 2026-07-26 15:23:22
● 2026-07-28 00:18:14
○ 2026-07-28 02:53:14
● 2026-07-28 15:24:22
○ 2026-07-28 20:12:58
○ 2026-08-06 17:49:42

○A13.249.228.942026-07-26 → 2026-07-28 · 8 obs

○ 2026-07-26 04:27:24
● 2026-07-26 13:55:44
○ 2026-07-26 15:23:22
● 2026-07-28 00:18:14
○ 2026-07-28 02:53:14
● 2026-07-28 15:24:22
○ 2026-07-28 20:12:58
○ 2026-08-06 17:49:42

○A143.204.29.1142026-03-31 → 2026-07-30 · 44 obs

○ 2026-03-30 08:51:48
● 2026-03-31 01:45:10
● 2026-03-31 08:22:42
○ 2026-03-31 11:14:26
○ 2026-04-01 08:56:56
● 2026-04-01 11:21:34
● 2026-04-01 16:54:42
○ 2026-04-01 18:05:34
○ 2026-04-05 08:40:18
● 2026-04-05 13:50:06
○ 2026-04-05 16:28:24
● 2026-04-05 20:35:04
○ 2026-04-06 00:12:36
○ 2026-04-07 00:32:04
● 2026-04-07 08:17:48
○ 2026-04-07 12:32:24
○ 2026-06-17 19:35:54
● 2026-06-17 21:32:44
○ 2026-06-18 06:18:20
● 2026-06-18 19:34:54
○ 2026-06-19 04:29:10
● 2026-06-19 06:11:30
○ 2026-06-19 10:35:42
● 2026-06-20 16:59:48
○ 2026-06-21 01:29:58
● 2026-06-24 12:02:04
○ 2026-06-24 23:14:52
● 2026-06-25 14:52:50
○ 2026-06-25 18:48:36
● 2026-06-25 21:53:02
○ 2026-06-26 07:52:52
● 2026-06-26 15:34:56
○ 2026-06-26 16:15:32
● 2026-06-28 00:07:50
○ 2026-06-28 06:17:24
● 2026-06-29 01:28:08
○ 2026-06-29 02:39:42
● 2026-06-29 21:28:56
○ 2026-06-30 09:59:46
● 2026-07-28 20:12:58
○ 2026-07-30 02:38:12
● 2026-07-30 10:52:28
○ 2026-07-30 19:02:52
○ 2026-08-06 17:49:42

○A143.204.29.1172026-03-31 → 2026-07-30 · 44 obs

○A143.204.29.1262026-03-31 → 2026-07-30 · 44 obs

○A143.204.29.832026-03-31 → 2026-07-30 · 44 obs

○A18.155.107.1002026-05-28 → 2026-05-28 · 4 obs

○ 2026-05-28 14:57:32
● 2026-05-28 18:44:08
○ 2026-05-29 00:51:14
○ 2026-08-06 17:49:42

○A18.155.107.202026-05-28 → 2026-05-28 · 4 obs

○ 2026-05-28 14:57:32
● 2026-05-28 18:44:08
○ 2026-05-29 00:51:14
○ 2026-08-06 17:49:42

○A18.155.107.492026-05-28 → 2026-05-28 · 4 obs

○ 2026-05-28 14:57:32
● 2026-05-28 18:44:08
○ 2026-05-29 00:51:14
○ 2026-08-06 17:49:42

○A18.155.107.812026-05-28 → 2026-05-28 · 4 obs

○ 2026-05-28 14:57:32
● 2026-05-28 18:44:08
○ 2026-05-29 00:51:14
○ 2026-08-06 17:49:42

○A18.164.96.1012026-03-08 → 2026-03-14 · 10 obs

○ 2026-03-07 09:50:40
● 2026-03-08 00:12:34
○ 2026-03-08 04:32:28
○ 2026-03-14 05:06:58
● 2026-03-14 05:43:24
○ 2026-03-14 08:10:52
○ 2026-03-14 15:35:46
● 2026-03-14 16:19:16
○ 2026-03-14 18:11:54
○ 2026-08-06 17:49:42

○A18.164.96.1182026-03-08 → 2026-03-14 · 10 obs

○A18.164.96.312026-03-08 → 2026-03-14 · 10 obs

○A18.164.96.422026-03-08 → 2026-03-14 · 10 obs

○A18.172.134.1162026-05-19 → 2026-07-01 · 32 obs

○ 2026-05-19 19:35:42
● 2026-05-19 22:15:02
● 2026-05-20 22:27:32
○ 2026-05-21 20:38:54
○ 2026-05-21 21:57:26
● 2026-05-22 16:09:12
○ 2026-05-23 08:44:38
○ 2026-05-25 02:28:04
● 2026-05-25 13:11:18
○ 2026-05-26 05:50:36
● 2026-05-26 11:46:28
○ 2026-05-27 02:50:14
○ 2026-05-27 15:10:50
● 2026-05-28 07:06:44
○ 2026-05-28 14:57:32
● 2026-05-29 07:07:58
○ 2026-05-29 20:46:34
● 2026-05-31 08:38:08
○ 2026-05-31 22:42:08
○ 2026-06-01 11:23:08
● 2026-06-02 02:42:58
● 2026-06-03 17:56:42
○ 2026-06-04 07:27:20
● 2026-06-04 10:09:16
○ 2026-06-08 01:14:22
● 2026-06-30 15:14:16
○ 2026-06-30 18:09:02
● 2026-06-30 19:29:06
○ 2026-06-30 21:39:50
● 2026-07-01 15:56:02
○ 2026-07-01 23:42:14
○ 2026-08-06 17:49:42

○A18.172.134.572026-05-19 → 2026-07-01 · 32 obs

○A18.172.134.802026-05-19 → 2026-07-01 · 32 obs

○A18.172.134.932026-05-19 → 2026-07-01 · 32 obs

○A18.239.18.1022026-03-23 → 2026-04-05 · 7 obs

○ 2026-03-18 11:15:36
● 2026-03-23 23:18:42
○ 2026-03-24 02:00:22
○ 2026-04-05 13:50:06
● 2026-04-05 16:28:24
○ 2026-04-05 20:35:04
○ 2026-08-06 17:49:42

○A18.239.18.1082026-03-23 → 2026-04-05 · 7 obs

○ 2026-03-18 11:15:36
● 2026-03-23 23:18:42
○ 2026-03-24 02:00:22
○ 2026-04-05 13:50:06
● 2026-04-05 16:28:24
○ 2026-04-05 20:35:04
○ 2026-08-06 17:49:42

○A18.239.18.1212026-03-23 → 2026-04-05 · 7 obs

○ 2026-03-18 11:15:36
● 2026-03-23 23:18:42
○ 2026-03-24 02:00:22
○ 2026-04-05 13:50:06
● 2026-04-05 16:28:24
○ 2026-04-05 20:35:04
○ 2026-08-06 17:49:42

○A18.239.18.742026-03-23 → 2026-04-05 · 7 obs

○ 2026-03-18 11:15:36
● 2026-03-23 23:18:42
○ 2026-03-24 02:00:22
○ 2026-04-05 13:50:06
● 2026-04-05 16:28:24
○ 2026-04-05 20:35:04
○ 2026-08-06 17:49:42

○A18.239.183.182026-03-09 → 2026-05-18 · 26 obs

○ 2026-03-08 04:32:28
● 2026-03-09 00:12:20
○ 2026-03-09 01:31:20
○ 2026-04-20 17:23:06
● 2026-04-20 21:45:54
○ 2026-04-21 12:14:04
● 2026-04-21 20:34:28
○ 2026-04-22 02:57:04
○ 2026-04-24 23:34:12
● 2026-04-25 06:20:18
○ 2026-04-25 14:40:54
○ 2026-05-03 23:39:38
● 2026-05-04 07:44:04
○ 2026-05-04 19:19:48
○ 2026-05-08 19:01:10
● 2026-05-09 08:07:50
○ 2026-05-09 13:56:40
○ 2026-05-15 22:05:06
● 2026-05-16 02:27:04
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○A18.239.183.32026-03-09 → 2026-05-18 · 26 obs

○A18.239.183.382026-03-09 → 2026-05-18 · 26 obs

○A18.239.183.522026-03-09 → 2026-05-18 · 26 obs

○A216.137.53.1152026-02-18 → 2026-07-21 · 61 obs

○ 2026-02-18 00:10:44
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○A216.137.53.222026-02-18 → 2026-07-21 · 61 obs

○A216.137.53.382026-02-18 → 2026-07-21 · 61 obs

○A216.137.53.722026-02-18 → 2026-07-21 · 61 obs

○A3.164.68.1102026-03-24 → 2026-07-14 · 11 obs

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○A3.164.68.1152026-03-24 → 2026-07-14 · 11 obs

○A3.164.68.512026-03-24 → 2026-07-14 · 11 obs

○A3.164.68.592026-03-24 → 2026-07-14 · 11 obs

○A3.166.192.142026-07-13 → 2026-07-30 · 24 obs

○ 2026-07-11 07:53:46
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○A3.166.192.192026-07-13 → 2026-07-30 · 24 obs

○A3.166.192.242026-07-13 → 2026-07-30 · 24 obs

○A3.166.192.502026-07-13 → 2026-07-30 · 24 obs

●A3.170.42.362026-02-18 → 2026-08-06 · 64 obs

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●A3.170.42.632026-02-18 → 2026-08-06 · 64 obs

●A3.170.42.672026-02-18 → 2026-08-06 · 64 obs

●A3.170.42.922026-02-18 → 2026-08-06 · 64 obs

○A3.173.182.242026-02-23 → 2026-03-02 · 7 obs

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○A3.173.182.362026-02-23 → 2026-03-02 · 7 obs

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○A3.173.182.732026-02-23 → 2026-03-02 · 7 obs

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○A3.173.182.872026-02-23 → 2026-03-02 · 7 obs

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○A3.174.59.1142026-04-11 → 2026-07-27 · 51 obs

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○A3.174.59.1152026-04-11 → 2026-07-27 · 51 obs

○A3.174.59.562026-04-11 → 2026-07-27 · 51 obs

○A3.174.59.622026-04-11 → 2026-07-27 · 51 obs

○A52.72.226.1102017-04-01 → 2017-04-01 · 3 obs

● 2017-04-01 03:54:42
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○A54.165.193.112017-04-01 → 2017-04-01 · 3 obs

● 2017-04-01 03:54:42
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○A99.84.41.1012026-02-17 → 2026-08-05 · 58 obs

○ 2026-02-16 07:55:42
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○A99.84.41.162026-02-17 → 2026-08-05 · 58 obs

○A99.84.41.702026-02-17 → 2026-08-05 · 58 obs

○A99.84.41.972026-02-17 → 2026-08-05 · 58 obs

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	c.gtld-servers.net, g.gtld-servers.net, j.gtld-servers.net, i.gtld-servers.net...	-
bartleby.com	ns-44.awsdns-05.com, ns-663.awsdns-18.net, ns-1563.awsdns-03.co.uk, ns-1443.awsdns-52.org	2 records

✅ Authoritative Response

Server:205.251.192.44

NS records: ns-44.awsdns-05.com, ns-663.awsdns-18.net, ns-1563.awsdns-03.co.uk, ns-1443.awsdns-52.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for bartleby.com (unsigned zone)

⏱️ Timing

Total: 260ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`3.170.42.36, 3.170.42.67...`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-44.awsdns-05.com, ns-44.awsdns-05.com)

Analysis

IP Addresses

api.bartleby.com points to the four IP addresses 3.170.42.36, 3.170.42.63, 3.170.42.67 and 3.170.42.92.

Two other host names, along with tts.code.org, api.houston.advgo.net and d.mirelz.com, also share IP numbers with api.bartleby.com.