coursescdn.responsivelearning.com - dns.ninja

`coursescdn.responsivelearning.com`

DNSSEC	⚠️ Not signed
A	13.35.107.17^{🇺🇸 Amazon13.35.107.0/24 -Cloudfront}
		PTR	`server-13-35-107-17.phl51.r.cloudfront.net`
A	13.35.107.25^{🇺🇸 Amazon13.35.107.0/24 -Cloudfront}
A	13.35.107.62^{🇺🇸 Amazon13.35.107.0/24 -Cloudfront}
A	13.35.107.107^{🇺🇸 Amazon13.35.107.0/24 -Cloudfront}

`responsivelearning.com`

	DNSSEC	⚠️ Not signed
	A	16.145.154.2^{🇺🇸 Amazon16.145.0.0/16}
	A	52.43.75.219^{🇺🇸 Amazon52.40.0.0/14 EC2 PDX prefix}
	NS	`ns-1272.awsdns-31.org` ⭐
	NS	`ns-1878.awsdns-42.co.uk`
	NS	`ns-378.awsdns-47.com`
	NS	`ns-781.awsdns-33.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	`google-site-verification=g8Xn3BuMZq11nnCjnjMp8ak7Twmj2y3vJvJTt1QFfTk`
	TXT	`v=spf1 include:_spf.google.com include:amazonses.com ip4:50.112.158.20 ~all`
	SOA	`ns-1272.awsdns-31.org`awsdns-hostmaster@amazon.com serial=1

DNS History

80 records (4 active, 76 former)

○A108.138.14.1032026-06-12 → 2026-07-17 · 58 obs

○ 2026-06-11 17:21:38
● 2026-06-12 05:07:54
○ 2026-06-12 14:22:10
● 2026-07-01 00:37:48
○ 2026-07-01 05:24:34
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● 2026-07-02 03:16:58
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● 2026-07-03 15:34:48
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● 2026-07-04 14:19:10
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● 2026-07-07 11:39:38
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● 2026-07-07 14:39:44
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● 2026-07-08 05:15:38
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● 2026-07-08 10:39:24
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● 2026-07-09 01:15:18
○ 2026-07-09 09:05:34
● 2026-07-09 10:50:38
○ 2026-07-09 23:50:34
● 2026-07-10 04:25:42
○ 2026-07-11 05:35:48
● 2026-07-11 06:38:06
○ 2026-07-11 07:33:10
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○ 2026-07-13 18:05:46
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● 2026-07-14 22:37:56
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● 2026-07-15 10:26:04
○ 2026-07-15 12:17:00
● 2026-07-15 14:27:52
○ 2026-07-16 15:22:26
● 2026-07-16 23:05:18
○ 2026-07-16 23:39:20
● 2026-07-17 00:48:54
○ 2026-07-17 09:43:28
○ 2026-07-17 09:43:30

○A108.138.14.252026-06-12 → 2026-07-17 · 58 obs

○A108.138.14.512026-06-12 → 2026-07-17 · 58 obs

○A108.138.14.932026-06-12 → 2026-07-17 · 58 obs

○A108.139.113.472026-04-08 → 2026-06-07 · 23 obs

○ 2026-04-07 01:12:10
● 2026-04-08 11:42:34
○ 2026-04-08 19:06:42
○ 2026-04-09 03:37:08
● 2026-04-09 14:47:06
● 2026-04-10 01:29:28
○ 2026-04-10 07:01:28
○ 2026-04-12 02:10:08
● 2026-04-12 04:03:54
○ 2026-04-12 08:26:30
● 2026-04-12 15:48:20
○ 2026-04-13 00:46:30
○ 2026-04-14 02:21:42
● 2026-04-15 11:50:50
○ 2026-04-15 18:54:44
○ 2026-04-17 08:10:22
● 2026-04-19 07:32:20
○ 2026-04-19 12:46:48
○ 2026-06-06 16:33:56
● 2026-06-07 07:57:00
● 2026-06-07 22:41:14
○ 2026-06-07 23:59:32
○ 2026-07-17 09:43:30

○A108.139.113.732026-04-08 → 2026-06-07 · 23 obs

○A108.139.113.752026-04-08 → 2026-06-07 · 23 obs

○A108.139.113.872026-04-08 → 2026-06-07 · 23 obs

○A13.32.241.1212026-03-14 → 2026-03-14 · 4 obs

○ 2026-03-14 03:51:06
● 2026-03-14 09:43:46
○ 2026-03-14 16:04:26
○ 2026-07-17 09:43:30

○A13.32.241.42026-03-14 → 2026-03-14 · 4 obs

○ 2026-03-14 03:51:06
● 2026-03-14 09:43:46
○ 2026-03-14 16:04:26
○ 2026-07-17 09:43:30

○A13.32.241.462026-03-14 → 2026-03-14 · 4 obs

○ 2026-03-14 03:51:06
● 2026-03-14 09:43:46
○ 2026-03-14 16:04:26
○ 2026-07-17 09:43:30

○A13.32.241.552026-03-14 → 2026-03-14 · 4 obs

○ 2026-03-14 03:51:06
● 2026-03-14 09:43:46
○ 2026-03-14 16:04:26
○ 2026-07-17 09:43:30

○A13.33.129.162026-04-28 → 2026-05-28 · 23 obs

○ 2026-04-28 00:27:58
● 2026-04-28 01:17:24
○ 2026-04-28 02:04:26
○ 2026-05-06 15:39:22
● 2026-05-06 16:13:36
○ 2026-05-06 19:08:48
○ 2026-05-15 04:34:10
● 2026-05-15 12:27:32
○ 2026-05-15 13:26:20
○ 2026-05-16 01:02:22
● 2026-05-16 08:03:24
○ 2026-05-16 09:18:16
○ 2026-05-16 12:48:18
● 2026-05-16 15:13:42
○ 2026-05-16 16:17:14
○ 2026-05-17 10:09:56
● 2026-05-17 11:26:28
○ 2026-05-17 13:18:22
○ 2026-05-28 11:34:00
● 2026-05-28 16:48:00
● 2026-05-28 17:46:24
○ 2026-05-28 18:47:22
○ 2026-07-17 09:43:30

○A13.33.129.422026-04-28 → 2026-05-28 · 23 obs

○A13.33.129.452026-04-28 → 2026-05-28 · 23 obs

○A13.33.129.72026-04-28 → 2026-05-28 · 23 obs

○A13.33.131.1142026-07-01 → 2026-07-14 · 8 obs

○ 2026-07-01 17:02:04
● 2026-07-01 23:12:36
○ 2026-07-02 03:16:58
● 2026-07-03 01:35:08
○ 2026-07-03 15:34:48
● 2026-07-14 10:06:44
○ 2026-07-14 17:32:54
○ 2026-07-17 09:43:30

○A13.33.131.422026-07-01 → 2026-07-14 · 8 obs

○ 2026-07-01 17:02:04
● 2026-07-01 23:12:36
○ 2026-07-02 03:16:58
● 2026-07-03 01:35:08
○ 2026-07-03 15:34:48
● 2026-07-14 10:06:44
○ 2026-07-14 17:32:54
○ 2026-07-17 09:43:30

○A13.33.131.562026-07-01 → 2026-07-14 · 8 obs

○ 2026-07-01 17:02:04
● 2026-07-01 23:12:36
○ 2026-07-02 03:16:58
● 2026-07-03 01:35:08
○ 2026-07-03 15:34:48
● 2026-07-14 10:06:44
○ 2026-07-14 17:32:54
○ 2026-07-17 09:43:30

○A13.33.131.872026-07-01 → 2026-07-14 · 8 obs

○ 2026-07-01 17:02:04
● 2026-07-01 23:12:36
○ 2026-07-02 03:16:58
● 2026-07-03 01:35:08
○ 2026-07-03 15:34:48
● 2026-07-14 10:06:44
○ 2026-07-14 17:32:54
○ 2026-07-17 09:43:30

○A13.33.153.142026-02-15 → 2026-06-27 · 26 obs

● 2026-02-15 04:38:18
● 2026-02-17 00:09:44
○ 2026-02-17 17:46:22
● 2026-02-17 19:13:32
● 2026-03-30 01:59:28
○ 2026-03-31 10:54:22
● 2026-04-02 03:04:40
● 2026-05-02 22:32:26
○ 2026-05-03 15:25:38
○ 2026-05-07 21:27:04
● 2026-05-08 18:23:00
● 2026-05-19 00:51:04
○ 2026-05-19 09:00:50
○ 2026-06-11 17:21:38
● 2026-06-12 14:22:10
● 2026-06-14 15:56:20
○ 2026-06-15 23:12:56
● 2026-06-16 02:21:28
○ 2026-06-20 18:12:22
● 2026-06-21 01:32:26
○ 2026-06-22 14:52:34
● 2026-06-22 17:40:00
○ 2026-06-27 08:34:02
● 2026-06-27 18:23:00
○ 2026-06-30 23:26:14
○ 2026-07-17 09:43:30

○A13.33.153.352026-02-15 → 2026-06-27 · 26 obs

○A13.33.153.572026-02-15 → 2026-06-27 · 26 obs

○A13.33.153.772026-02-15 → 2026-06-27 · 26 obs

●A13.35.107.1072026-07-12 → 2026-07-17 · 17 obs

○ 2026-07-12 11:50:24
● 2026-07-12 18:32:02
○ 2026-07-12 20:19:08
● 2026-07-13 10:27:44
○ 2026-07-13 11:50:34
● 2026-07-13 12:24:14
○ 2026-07-13 13:51:32
● 2026-07-13 18:05:46
○ 2026-07-14 03:32:06
● 2026-07-15 12:17:00
○ 2026-07-15 14:27:52
● 2026-07-16 18:30:44
○ 2026-07-16 19:37:36
● 2026-07-17 00:18:34
○ 2026-07-17 00:48:54
● 2026-07-17 09:43:28
● 2026-07-17 09:43:30

●A13.35.107.172026-07-12 → 2026-07-17 · 17 obs

●A13.35.107.252026-07-12 → 2026-07-17 · 17 obs

●A13.35.107.622026-07-12 → 2026-07-17 · 17 obs

○A13.35.78.112026-02-17 → 2026-07-09 · 47 obs

○ 2026-02-15 04:38:18
○ 2026-02-17 00:09:44
● 2026-02-17 17:46:22
○ 2026-02-17 19:13:32
● 2026-02-18 02:24:50
● 2026-02-18 12:46:16
○ 2026-02-18 18:56:06
○ 2026-03-12 10:04:40
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○ 2026-03-13 01:43:24
○ 2026-03-17 04:04:36
● 2026-03-17 19:24:08
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○ 2026-06-11 07:09:24
● 2026-06-11 17:21:38
○ 2026-06-12 05:07:54
○ 2026-06-14 15:56:20
● 2026-06-15 11:17:44
● 2026-06-15 23:12:56
○ 2026-06-16 02:21:28
● 2026-06-20 18:12:22
○ 2026-06-21 01:32:26
● 2026-06-22 14:52:34
○ 2026-06-22 17:40:00
● 2026-06-27 11:14:32
○ 2026-06-27 12:02:36
● 2026-06-30 23:26:14
○ 2026-07-01 00:37:48
● 2026-07-01 05:24:34
○ 2026-07-01 09:11:10
● 2026-07-01 17:02:04
○ 2026-07-01 23:12:36
● 2026-07-02 12:40:32
○ 2026-07-02 14:20:40
● 2026-07-03 00:07:18
○ 2026-07-03 01:35:08
● 2026-07-04 13:36:56
○ 2026-07-04 14:19:10
● 2026-07-08 04:00:44
○ 2026-07-08 05:15:38
● 2026-07-08 07:16:46
○ 2026-07-08 10:39:24
● 2026-07-09 09:05:34
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● 2026-07-09 23:50:34
○ 2026-07-10 04:25:42
○ 2026-07-17 09:43:30

○A13.35.78.1142026-02-17 → 2026-07-09 · 47 obs

○A13.35.78.122026-02-17 → 2026-07-09 · 47 obs

○A13.35.78.602026-02-17 → 2026-07-09 · 47 obs

○A18.154.185.1252026-05-20 → 2026-07-02 · 25 obs

○ 2026-05-19 16:15:26
● 2026-05-20 01:22:06
● 2026-05-20 05:01:32
○ 2026-05-20 10:19:30
● 2026-05-20 11:04:40
● 2026-05-27 06:17:20
○ 2026-05-28 10:38:52
● 2026-05-29 01:59:02
○ 2026-05-29 15:17:22
○ 2026-05-30 13:05:52
● 2026-05-31 10:04:22
○ 2026-05-31 16:57:14
○ 2026-06-01 12:14:46
● 2026-06-01 22:03:20
● 2026-06-02 17:16:34
○ 2026-06-03 11:02:58
● 2026-06-03 18:58:16
● 2026-06-06 16:33:56
○ 2026-06-07 07:57:00
○ 2026-06-07 22:41:14
● 2026-06-07 23:59:32
○ 2026-06-08 09:47:08
● 2026-07-02 05:31:34
○ 2026-07-02 12:40:32
○ 2026-07-17 09:43:30

○A18.154.185.782026-05-20 → 2026-07-02 · 25 obs

○A18.154.185.872026-05-20 → 2026-07-02 · 25 obs

○A18.154.185.912026-05-20 → 2026-07-02 · 25 obs

○A18.161.205.302026-04-05 → 2026-04-05 · 4 obs

○ 2026-04-04 12:40:26
● 2026-04-05 01:59:34
○ 2026-04-05 02:55:24
○ 2026-07-17 09:43:30

○A18.161.205.542026-04-05 → 2026-04-05 · 4 obs

○ 2026-04-04 12:40:26
● 2026-04-05 01:59:34
○ 2026-04-05 02:55:24
○ 2026-07-17 09:43:30

○A18.161.205.572026-04-05 → 2026-04-05 · 4 obs

○ 2026-04-04 12:40:26
● 2026-04-05 01:59:34
○ 2026-04-05 02:55:24
○ 2026-07-17 09:43:30

○A18.161.205.652026-04-05 → 2026-04-05 · 4 obs

○ 2026-04-04 12:40:26
● 2026-04-05 01:59:34
○ 2026-04-05 02:55:24
○ 2026-07-17 09:43:30

○A18.161.34.1182026-04-22 → 2026-05-20 · 22 obs

○ 2026-04-19 12:46:48
● 2026-04-22 00:33:50
○ 2026-04-22 03:08:36
○ 2026-04-23 20:49:12
● 2026-04-24 00:33:08
○ 2026-04-24 02:57:32
○ 2026-04-26 18:30:50
● 2026-04-28 00:27:58
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○ 2026-05-01 03:11:14
● 2026-05-01 21:24:14
○ 2026-05-02 03:06:10
○ 2026-05-02 22:32:26
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○ 2026-05-04 10:06:30
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○ 2026-07-17 09:43:30

○A18.161.34.1222026-04-22 → 2026-05-20 · 22 obs

○A18.161.34.272026-04-22 → 2026-05-20 · 22 obs

○A18.161.34.882026-04-22 → 2026-05-20 · 22 obs

○A3.163.63.792026-05-04 → 2026-05-04 · 4 obs

○ 2026-05-03 15:25:38
● 2026-05-04 03:56:26
○ 2026-05-04 10:06:30
○ 2026-07-17 09:43:30

○A3.163.63.812026-05-04 → 2026-05-04 · 4 obs

○ 2026-05-03 15:25:38
● 2026-05-04 03:56:26
○ 2026-05-04 10:06:30
○ 2026-07-17 09:43:30

○A3.163.63.852026-05-04 → 2026-05-04 · 4 obs

○ 2026-05-03 15:25:38
● 2026-05-04 03:56:26
○ 2026-05-04 10:06:30
○ 2026-07-17 09:43:30

○A3.163.63.912026-05-04 → 2026-05-04 · 4 obs

○ 2026-05-03 15:25:38
● 2026-05-04 03:56:26
○ 2026-05-04 10:06:30
○ 2026-07-17 09:43:30

○A3.164.28.1012026-03-31 → 2026-05-12 · 23 obs

○ 2026-03-30 01:59:28
● 2026-03-31 10:54:22
● 2026-03-31 11:35:02
○ 2026-03-31 14:58:32
○ 2026-04-01 02:20:22
● 2026-04-01 10:56:32
○ 2026-04-02 03:04:40
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● 2026-04-07 00:05:52
○ 2026-04-07 01:12:10
○ 2026-04-13 00:46:30
● 2026-04-13 12:23:28
○ 2026-04-13 22:39:08
○ 2026-04-23 06:26:44
● 2026-04-23 15:51:28
○ 2026-04-24 02:57:32
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● 2026-05-04 10:06:30
○ 2026-05-05 00:38:34
○ 2026-05-12 05:13:46
● 2026-05-12 08:26:58
○ 2026-05-12 13:45:00
○ 2026-07-17 09:43:30

○A3.164.28.332026-03-31 → 2026-05-12 · 23 obs

○A3.164.28.732026-03-31 → 2026-05-12 · 23 obs

○A3.164.28.892026-03-31 → 2026-05-12 · 23 obs

○A3.164.29.242026-05-19 → 2026-06-11 · 23 obs

○ 2026-05-19 00:51:04
● 2026-05-19 09:00:50
○ 2026-05-19 10:01:24
● 2026-05-19 13:59:32
● 2026-05-19 16:15:26
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○ 2026-05-27 06:17:20
● 2026-05-28 10:38:52
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● 2026-06-08 20:02:56
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● 2026-06-10 23:17:36
● 2026-06-11 03:49:16
○ 2026-06-11 07:09:24
○ 2026-07-17 09:43:30

○A3.164.29.422026-05-19 → 2026-06-11 · 23 obs

○A3.164.29.772026-05-19 → 2026-06-11 · 23 obs

○A3.164.29.82026-05-19 → 2026-06-11 · 23 obs

○A3.164.36.1022026-05-28 → 2026-06-05 · 13 obs

○ 2026-05-28 17:46:24
● 2026-05-28 18:47:22
○ 2026-05-28 23:20:16
○ 2026-05-30 07:51:20
● 2026-05-30 13:05:52
○ 2026-05-30 18:31:56
○ 2026-06-04 10:55:16
● 2026-06-04 12:22:40
○ 2026-06-04 16:55:12
○ 2026-06-05 09:04:34
● 2026-06-05 10:04:52
○ 2026-06-05 11:16:52
○ 2026-07-17 09:43:30

○A3.164.36.182026-05-28 → 2026-06-05 · 13 obs

○A3.164.36.392026-05-28 → 2026-06-05 · 13 obs

○A3.164.36.482026-05-28 → 2026-06-05 · 13 obs

○A3.164.68.362026-03-25 → 2026-03-26 · 7 obs

○ 2026-03-19 19:14:18
● 2026-03-25 00:39:10
○ 2026-03-25 01:40:52
○ 2026-03-25 16:45:48
● 2026-03-26 02:11:16
○ 2026-03-26 03:27:14
○ 2026-07-17 09:43:30

○A3.164.68.612026-03-25 → 2026-03-26 · 7 obs

○ 2026-03-19 19:14:18
● 2026-03-25 00:39:10
○ 2026-03-25 01:40:52
○ 2026-03-25 16:45:48
● 2026-03-26 02:11:16
○ 2026-03-26 03:27:14
○ 2026-07-17 09:43:30

○A3.164.68.732026-03-25 → 2026-03-26 · 7 obs

○ 2026-03-19 19:14:18
● 2026-03-25 00:39:10
○ 2026-03-25 01:40:52
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● 2026-03-26 02:11:16
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○ 2026-07-17 09:43:30

○A3.164.68.942026-03-25 → 2026-03-26 · 7 obs

○ 2026-03-19 19:14:18
● 2026-03-25 00:39:10
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● 2026-03-26 02:11:16
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○ 2026-07-17 09:43:30

○A3.167.212.1172026-02-19 → 2026-07-11 · 31 obs

○ 2026-02-18 18:56:06
● 2026-02-19 14:59:08
● 2026-02-19 17:56:38
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○ 2026-02-27 03:05:36
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● 2026-03-03 04:48:06
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● 2026-03-06 10:53:18
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● 2026-03-19 17:56:58
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● 2026-07-05 03:43:18
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● 2026-07-11 05:35:48
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○ 2026-07-17 09:43:30

○A3.167.212.412026-02-19 → 2026-07-11 · 31 obs

○A3.167.212.832026-02-19 → 2026-07-11 · 31 obs

○A3.167.212.962026-02-19 → 2026-07-11 · 31 obs

○A3.173.182.1202026-03-02 → 2026-03-16 · 7 obs

○ 2026-02-27 07:04:10
● 2026-03-02 10:04:44
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○ 2026-03-16 05:03:28
● 2026-03-16 07:03:42
○ 2026-03-16 11:04:30
○ 2026-07-17 09:43:30

○A3.173.182.32026-03-02 → 2026-03-16 · 7 obs

○ 2026-02-27 07:04:10
● 2026-03-02 10:04:44
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● 2026-03-16 07:03:42
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○A3.173.182.342026-03-02 → 2026-03-16 · 7 obs

○ 2026-02-27 07:04:10
● 2026-03-02 10:04:44
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● 2026-03-16 07:03:42
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○A3.173.182.362026-03-02 → 2026-03-16 · 7 obs

○ 2026-02-27 07:04:10
● 2026-03-02 10:04:44
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● 2026-03-16 07:03:42
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○A3.174.113.1242026-03-25 → 2026-07-16 · 34 obs

○ 2026-03-25 01:40:52
● 2026-03-25 16:45:48
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● 2026-03-26 20:46:16
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○A3.174.113.212026-03-25 → 2026-07-16 · 34 obs

○A3.174.113.262026-03-25 → 2026-07-16 · 34 obs

○A3.174.113.42026-03-25 → 2026-07-16 · 34 obs

○A99.84.132.212026-03-31 → 2026-06-27 · 22 obs

○ 2026-03-31 11:35:02
● 2026-03-31 14:58:32
● 2026-03-31 22:34:08
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○A99.84.132.462026-03-31 → 2026-06-27 · 22 obs

○A99.84.132.742026-03-31 → 2026-06-27 · 22 obs

○A99.84.132.792026-03-31 → 2026-06-27 · 22 obs

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
responsivelearning.com	ns-378.awsdns-47.com, ns-781.awsdns-33.net, ns-1878.awsdns-42.co.uk, ns-1272.awsdns-31.org	2 records

✅ Authoritative Response

Server:205.251.196.248

NS records: ns-378.awsdns-47.com, ns-781.awsdns-33.net, ns-1878.awsdns-42.co.uk, ns-1272.awsdns-31.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for responsivelearning.com (unsigned zone)

⏱️ Timing

Total: 577ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`13.35.107.25, 13.35.107.107...`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-378.awsdns-47.com, ns-378.awsdns-47.com)

Analysis

IP Addresses

coursescdn.responsivelearning.com points to the four IP addresses 13.35.107.17, 13.35.107.25, 13.35.107.62 and 13.35.107.107.

jamfprotect.io, picassofloraldesign.com, associatesdegree.com and two other host names share IP numbers with coursescdn.responsivelearning.com.