`www.offcourse.io`

DNSSEC	⚠️ Not signed
A	13.227.207.31^{🇺🇸 Amazon13.227.200.0/21}
		PTR	`server-13-227-207-31.gru3.r.cloudfront.net`
A	13.227.207.93^{🇺🇸 Amazon13.227.200.0/21}
A	13.227.207.103^{🇺🇸 Amazon13.227.200.0/21}
A	13.227.207.129^{🇺🇸 Amazon13.227.200.0/21}

`offcourse.io`

	DNSSEC	⚠️ Not signed
	A	13.32.205.24^{Amazon13.32.200.0/21 - Cloudfront}
	A	13.32.205.69^{Amazon13.32.200.0/21 - Cloudfront}
	A	13.32.205.81^{Amazon13.32.200.0/21 - Cloudfront}
	A	13.32.205.108^{Amazon13.32.200.0/21 - Cloudfront}
	NS	`ns-1860.awsdns-40.co.uk` ⭐
	NS	`ns-1375.awsdns-43.org`
	NS	`ns-1763.awsdns-28.co.uk`
	NS	`ns-352.awsdns-44.com`
	NS	`ns-623.awsdns-13.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⁾
	SOA	`ns-1860.awsdns-40.co.uk`awsdns-hostmaster@amazon.com serial=1

DNS History

57 records (4 active, 53 former)

○A108.139.119.1202026-04-10 → 2026-05-18 · 15 obs

● 2026-04-10 20:56:30
○ 2026-04-11 23:46:36
○ 2026-04-16 22:26:30
● 2026-04-17 03:29:40
○ 2026-04-18 10:43:40
○ 2026-05-15 22:12:08
● 2026-05-16 00:46:04
○ 2026-05-16 01:19:08
○ 2026-05-17 15:12:14
● 2026-05-17 16:49:28
○ 2026-05-17 21:17:36
○ 2026-05-18 21:29:40
● 2026-05-18 22:04:12
○ 2026-05-18 23:01:40
○ 2026-06-03 14:55:08

○A108.139.119.1252026-04-10 → 2026-05-18 · 15 obs

○A108.139.119.182026-04-10 → 2026-05-18 · 15 obs

○A108.139.119.222026-04-10 → 2026-05-18 · 15 obs

○A108.159.15.1282026-05-26 → 2026-05-26 · 4 obs

○ 2026-05-26 21:07:56
● 2026-05-26 22:00:12
○ 2026-05-26 22:35:24
○ 2026-06-03 14:55:08

○A108.159.15.412026-05-26 → 2026-05-26 · 4 obs

○ 2026-05-26 21:07:56
● 2026-05-26 22:00:12
○ 2026-05-26 22:35:24
○ 2026-06-03 14:55:08

○A108.159.15.82026-05-26 → 2026-05-26 · 4 obs

○ 2026-05-26 21:07:56
● 2026-05-26 22:00:12
○ 2026-05-26 22:35:24
○ 2026-06-03 14:55:08

○A108.159.15.942026-05-26 → 2026-05-26 · 4 obs

○ 2026-05-26 21:07:56
● 2026-05-26 22:00:12
○ 2026-05-26 22:35:24
○ 2026-06-03 14:55:08

●A13.227.207.1032026-04-16 → 2026-06-03 · 180 obs

○ 2026-04-15 13:56:22
● 2026-04-16 07:29:04
○ 2026-04-16 22:26:30
○ 2026-04-23 18:30:42
● 2026-04-24 09:19:58
○ 2026-04-25 06:33:40
● 2026-04-25 17:25:30
○ 2026-04-25 20:53:22
○ 2026-04-26 09:39:08
● 2026-04-26 14:04:06
● 2026-04-26 15:46:52
○ 2026-04-27 18:10:00
○ 2026-04-27 19:05:34
● 2026-04-27 22:48:42
● 2026-04-28 12:36:34
○ 2026-04-28 15:06:54
○ 2026-04-28 16:16:10
● 2026-04-28 17:20:30
● 2026-04-29 08:06:38
○ 2026-04-30 00:32:08
○ 2026-04-30 23:51:52
● 2026-05-01 06:48:10
● 2026-05-01 09:26:36
○ 2026-05-02 00:26:50
○ 2026-05-03 21:13:20
● 2026-05-03 22:34:54
○ 2026-05-03 23:14:18
○ 2026-05-04 19:18:08
● 2026-05-05 00:41:58
○ 2026-05-05 07:56:02
○ 2026-05-07 21:43:48
● 2026-05-07 23:41:32
○ 2026-05-08 00:31:20
○ 2026-05-08 01:10:34
● 2026-05-08 06:27:56
● 2026-05-08 07:55:14
○ 2026-05-08 09:00:14
● 2026-05-08 09:45:36
○ 2026-05-08 12:28:48
● 2026-05-08 16:00:24
○ 2026-05-08 23:24:36
● 2026-05-09 00:42:06
○ 2026-05-09 02:18:44
○ 2026-05-09 08:23:26
● 2026-05-09 09:33:22
○ 2026-05-09 10:45:20
○ 2026-05-11 18:22:48
● 2026-05-12 00:43:52
○ 2026-05-12 01:36:38
● 2026-05-12 06:59:08
● 2026-05-12 07:54:54
○ 2026-05-12 08:50:18
● 2026-05-12 10:29:04
● 2026-05-12 16:48:34
○ 2026-05-12 18:49:50
○ 2026-05-12 22:17:10
● 2026-05-13 00:26:54
○ 2026-05-13 02:35:14
○ 2026-05-15 04:54:26
● 2026-05-15 06:22:48
○ 2026-05-15 07:17:48
○ 2026-05-15 20:40:10
● 2026-05-15 22:12:08
○ 2026-05-16 00:46:04
○ 2026-05-19 06:38:02
● 2026-05-19 09:44:28
● 2026-05-19 20:09:08
○ 2026-05-19 23:28:02
○ 2026-05-20 00:15:34
● 2026-05-20 02:52:22
○ 2026-05-20 04:04:00
○ 2026-05-20 04:47:32
● 2026-05-20 05:37:02
○ 2026-05-20 06:15:20
○ 2026-05-20 22:55:16
● 2026-05-21 00:09:52
○ 2026-05-21 00:41:00
○ 2026-05-22 07:07:52
● 2026-05-22 07:59:02
● 2026-05-22 13:58:22
○ 2026-05-22 16:07:38
○ 2026-05-23 00:15:38
● 2026-05-23 02:00:56
○ 2026-05-23 06:02:28
○ 2026-05-23 08:18:08
● 2026-05-23 11:25:54
○ 2026-05-23 13:00:42
○ 2026-05-23 14:44:18
● 2026-05-23 16:10:02
○ 2026-05-23 17:08:28
○ 2026-05-24 01:53:38
● 2026-05-24 02:52:26
○ 2026-05-24 03:43:58
○ 2026-05-24 10:02:28
● 2026-05-24 12:23:28
● 2026-05-24 14:32:58
○ 2026-05-24 16:01:56
○ 2026-05-24 20:33:10
● 2026-05-24 22:55:52
○ 2026-05-24 23:40:00
○ 2026-05-25 00:53:58
● 2026-05-25 03:46:44
○ 2026-05-25 04:40:48
● 2026-05-25 06:14:24
○ 2026-05-25 06:49:16
○ 2026-05-25 08:34:36
● 2026-05-25 09:18:18
○ 2026-05-25 10:25:20
○ 2026-05-25 11:08:58
● 2026-05-25 13:07:02
○ 2026-05-25 14:48:14
○ 2026-05-25 20:33:42
● 2026-05-25 23:49:32
● 2026-05-26 01:25:44
○ 2026-05-26 03:01:52
● 2026-05-26 03:58:00
○ 2026-05-26 04:46:40
○ 2026-05-26 05:22:40
● 2026-05-26 08:56:34
○ 2026-05-26 09:48:16
○ 2026-05-26 20:22:20
● 2026-05-26 21:07:56
○ 2026-05-26 22:00:12
○ 2026-05-28 14:03:52
● 2026-05-28 14:37:20
○ 2026-05-28 15:08:30
○ 2026-05-29 00:59:26
● 2026-05-29 02:55:56
○ 2026-05-29 03:32:46
○ 2026-05-29 05:57:18
● 2026-05-29 07:10:38
○ 2026-05-29 08:59:30
● 2026-05-29 09:41:36
● 2026-05-29 15:25:16
○ 2026-05-29 15:55:24
○ 2026-05-29 18:27:50
● 2026-05-29 18:59:12
● 2026-05-29 19:34:26
○ 2026-05-29 20:09:30
○ 2026-05-30 03:21:16
● 2026-05-30 05:38:04
○ 2026-05-30 06:41:58
○ 2026-05-30 09:19:20
● 2026-05-30 10:50:06
○ 2026-05-30 12:22:32
○ 2026-05-31 05:32:22
● 2026-05-31 07:20:26
○ 2026-05-31 08:51:08
○ 2026-05-31 09:30:50
● 2026-05-31 16:16:00
● 2026-06-01 04:09:24
○ 2026-06-01 06:36:34
● 2026-06-01 07:31:50
○ 2026-06-01 16:54:28
○ 2026-06-02 04:02:54
● 2026-06-02 04:33:32
● 2026-06-02 07:28:16
○ 2026-06-02 08:43:46
○ 2026-06-02 11:26:18
● 2026-06-02 11:59:42
○ 2026-06-02 13:19:50
○ 2026-06-02 17:20:12
● 2026-06-02 19:23:52
○ 2026-06-02 20:32:20
○ 2026-06-02 22:59:46
● 2026-06-03 00:21:52
○ 2026-06-03 01:22:22
○ 2026-06-03 03:42:08
● 2026-06-03 05:16:52
● 2026-06-03 06:27:26
○ 2026-06-03 07:00:24
● 2026-06-03 07:31:10
● 2026-06-03 08:42:04
○ 2026-06-03 09:45:50
● 2026-06-03 10:51:10
○ 2026-06-03 11:24:28
● 2026-06-03 12:11:54
○ 2026-06-03 12:44:56
● 2026-06-03 13:15:46
● 2026-06-03 14:55:08

●A13.227.207.1292026-04-16 → 2026-06-03 · 180 obs

●A13.227.207.312026-04-16 → 2026-06-03 · 180 obs

●A13.227.207.932026-04-16 → 2026-06-03 · 180 obs

○A13.32.205.1082026-05-24 → 2026-06-03 · 62 obs

○ 2026-05-24 08:25:56
● 2026-05-24 10:02:28
○ 2026-05-24 12:23:28
○ 2026-05-27 07:41:16
● 2026-05-27 08:18:22
● 2026-05-27 10:55:54
○ 2026-05-27 14:42:56
○ 2026-05-27 16:38:26
● 2026-05-27 17:21:04
○ 2026-05-27 20:40:06
● 2026-05-27 23:19:46
○ 2026-05-28 00:11:58
○ 2026-05-28 00:49:50
● 2026-05-28 01:25:58
○ 2026-05-28 12:04:48
○ 2026-05-28 14:37:20
● 2026-05-28 15:08:30
○ 2026-05-28 17:26:00
● 2026-05-28 18:42:42
● 2026-05-28 22:21:26
○ 2026-05-28 23:17:04
○ 2026-05-29 03:32:46
● 2026-05-29 04:59:04
○ 2026-05-29 05:57:18
○ 2026-05-30 02:40:24
● 2026-05-30 03:21:16
○ 2026-05-30 05:38:04
○ 2026-05-30 12:22:32
● 2026-05-30 13:02:04
● 2026-05-31 05:32:22
○ 2026-05-31 07:20:26
● 2026-05-31 08:51:08
● 2026-05-31 09:30:50
○ 2026-05-31 16:16:00
○ 2026-06-01 07:31:50
● 2026-06-01 16:54:28
● 2026-06-01 19:40:34
○ 2026-06-01 20:14:38
○ 2026-06-02 07:28:16
● 2026-06-02 08:43:46
○ 2026-06-02 09:28:26
○ 2026-06-02 13:19:50
● 2026-06-02 14:07:10
● 2026-06-02 17:20:12
○ 2026-06-02 19:23:52
● 2026-06-02 20:32:20
● 2026-06-02 22:59:46
○ 2026-06-03 00:21:52
● 2026-06-03 01:22:22
● 2026-06-03 03:42:08
○ 2026-06-03 05:16:52
○ 2026-06-03 06:27:26
● 2026-06-03 07:00:24
○ 2026-06-03 07:31:10
○ 2026-06-03 08:42:04
● 2026-06-03 09:45:50
○ 2026-06-03 10:51:10
● 2026-06-03 11:24:28
○ 2026-06-03 12:11:54
● 2026-06-03 12:44:56
○ 2026-06-03 13:15:46
○ 2026-06-03 14:55:08

○A13.32.205.242026-05-24 → 2026-06-03 · 62 obs

○A13.32.205.692026-05-24 → 2026-06-03 · 62 obs

○A13.32.205.812026-05-24 → 2026-06-03 · 62 obs

○A13.33.109.1272026-05-10 → 2026-05-20 · 49 obs

○ 2026-05-10 04:46:40
● 2026-05-10 07:23:00
○ 2026-05-10 09:54:30
○ 2026-05-10 21:08:20
● 2026-05-10 23:11:36
○ 2026-05-11 00:39:08
○ 2026-05-11 01:28:44
● 2026-05-11 02:13:02
○ 2026-05-11 03:22:32
○ 2026-05-11 06:15:30
● 2026-05-11 07:29:26
○ 2026-05-11 08:33:20
○ 2026-05-12 00:43:52
● 2026-05-12 01:36:38
○ 2026-05-12 06:59:08
○ 2026-05-13 00:26:54
● 2026-05-13 02:35:14
○ 2026-05-13 03:41:10
○ 2026-05-13 05:33:36
● 2026-05-13 06:34:08
○ 2026-05-13 07:10:58
○ 2026-05-14 01:51:08
● 2026-05-14 02:35:08
○ 2026-05-14 03:26:16
○ 2026-05-14 12:16:10
● 2026-05-14 13:08:50
○ 2026-05-14 13:52:06
○ 2026-05-14 19:16:22
● 2026-05-14 19:52:42
○ 2026-05-14 23:17:42
○ 2026-05-15 12:22:50
● 2026-05-15 13:18:30
○ 2026-05-15 14:39:02
○ 2026-05-16 03:26:14
● 2026-05-16 04:35:38
○ 2026-05-16 05:17:44
○ 2026-05-17 01:39:40
● 2026-05-17 02:58:04
○ 2026-05-17 07:03:24
○ 2026-05-18 13:06:36
● 2026-05-18 15:20:34
○ 2026-05-18 17:48:02
○ 2026-05-19 01:50:50
● 2026-05-19 02:46:14
○ 2026-05-19 06:38:02
○ 2026-05-20 10:08:36
● 2026-05-20 14:45:58
○ 2026-05-20 20:16:08
○ 2026-06-03 14:55:08

○A13.33.109.1292026-05-10 → 2026-05-20 · 49 obs

○A13.33.109.192026-05-10 → 2026-05-20 · 49 obs

○A13.33.109.832026-05-10 → 2026-05-20 · 49 obs

○A13.33.82.1172026-04-21 → 2026-05-10 · 33 obs

○ 2026-04-20 22:40:22
● 2026-04-21 08:22:08
○ 2026-04-21 14:19:46
○ 2026-04-26 15:46:52
● 2026-04-27 18:10:00
○ 2026-04-27 19:05:34
○ 2026-04-28 12:36:34
● 2026-04-28 15:06:54
○ 2026-04-28 16:16:10
○ 2026-04-29 08:06:38
● 2026-04-30 00:32:08
○ 2026-04-30 02:58:34
○ 2026-05-01 09:26:36
● 2026-05-02 00:26:50
○ 2026-05-02 14:36:18
● 2026-05-03 03:34:24
○ 2026-05-03 10:04:12
○ 2026-05-05 22:53:58
● 2026-05-06 02:07:14
○ 2026-05-06 13:33:38
○ 2026-05-07 23:41:32
● 2026-05-08 00:31:20
○ 2026-05-08 01:10:34
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● 2026-05-09 08:23:26
○ 2026-05-09 09:33:22
○ 2026-05-09 10:45:20
● 2026-05-09 17:30:40
○ 2026-05-09 18:48:38
○ 2026-05-10 01:19:36
● 2026-05-10 02:20:28
○ 2026-05-10 04:46:40
○ 2026-06-03 14:55:08

○A13.33.82.1192026-04-21 → 2026-05-10 · 33 obs

○A13.33.82.472026-04-21 → 2026-05-10 · 33 obs

○A13.33.82.572026-04-21 → 2026-05-10 · 33 obs

○A13.35.202.182026-05-27 → 2026-06-02 · 26 obs

○ 2026-05-27 03:53:52
● 2026-05-27 07:41:16
○ 2026-05-27 08:18:22
○ 2026-05-27 23:19:46
● 2026-05-28 00:11:58
● 2026-05-28 00:49:50
○ 2026-05-28 01:25:58
○ 2026-05-28 23:17:04
● 2026-05-29 00:25:40
● 2026-05-29 00:59:26
○ 2026-05-29 02:55:56
○ 2026-05-29 04:59:04
● 2026-05-29 05:57:18
○ 2026-05-29 07:10:38
○ 2026-05-29 20:09:30
● 2026-05-30 00:51:34
● 2026-05-30 02:40:24
○ 2026-05-30 03:21:16
○ 2026-06-01 04:09:24
● 2026-06-01 06:36:34
○ 2026-06-01 07:31:50
○ 2026-06-01 20:14:38
● 2026-06-02 00:18:02
● 2026-06-02 00:59:44
○ 2026-06-02 01:39:24
○ 2026-06-03 14:55:08

○A13.35.202.352026-05-27 → 2026-06-02 · 26 obs

○A13.35.202.422026-05-27 → 2026-06-02 · 26 obs

○A13.35.202.912026-05-27 → 2026-06-02 · 26 obs

○A18.244.140.1062026-05-07 → 2026-05-18 · 14 obs

○ 2026-05-07 04:13:44
● 2026-05-07 05:08:06
○ 2026-05-07 10:00:08
○ 2026-05-17 02:58:04
● 2026-05-17 07:03:24
○ 2026-05-17 15:12:14
○ 2026-05-17 16:49:28
● 2026-05-17 21:17:36
○ 2026-05-17 22:23:08
○ 2026-05-17 23:01:48
● 2026-05-18 01:17:18
● 2026-05-18 03:50:08
○ 2026-05-18 13:06:36
○ 2026-06-03 14:55:08

○A18.244.140.742026-05-07 → 2026-05-18 · 14 obs

○A18.244.140.842026-05-07 → 2026-05-18 · 14 obs

○A18.244.140.872026-05-07 → 2026-05-18 · 14 obs

○A18.67.233.1162026-05-27 → 2026-06-02 · 33 obs

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

○A18.67.233.272026-05-27 → 2026-06-02 · 33 obs

○A18.67.233.602026-05-27 → 2026-06-02 · 33 obs

○A18.67.233.932026-05-27 → 2026-06-02 · 33 obs

○A3.161.150.1202026-05-21 → 2026-05-21 · 7 obs

○ 2026-05-21 08:55:40
● 2026-05-21 10:55:50
○ 2026-05-21 13:59:10
○ 2026-05-21 16:26:24
● 2026-05-21 21:13:14
○ 2026-05-21 23:31:34
○ 2026-06-03 14:55:08

○A3.161.150.392026-05-21 → 2026-05-21 · 7 obs

○ 2026-05-21 08:55:40
● 2026-05-21 10:55:50
○ 2026-05-21 13:59:10
○ 2026-05-21 16:26:24
● 2026-05-21 21:13:14
○ 2026-05-21 23:31:34
○ 2026-06-03 14:55:08

○A3.161.150.612026-05-21 → 2026-05-21 · 7 obs

○ 2026-05-21 08:55:40
● 2026-05-21 10:55:50
○ 2026-05-21 13:59:10
○ 2026-05-21 16:26:24
● 2026-05-21 21:13:14
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○A3.161.150.92026-05-21 → 2026-05-21 · 7 obs

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○A3.170.42.1232026-05-21 → 2026-05-26 · 13 obs

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○A3.170.42.1282026-05-21 → 2026-05-26 · 13 obs

○A3.170.42.492026-05-21 → 2026-05-26 · 13 obs

○A3.170.42.942026-05-21 → 2026-05-26 · 13 obs

○A3.171.22.32026-05-19 → 2026-05-30 · 86 obs

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○A3.171.22.472026-05-19 → 2026-05-30 · 86 obs

○A3.171.22.592026-05-19 → 2026-05-30 · 86 obs

○A3.171.22.722026-05-19 → 2026-05-30 · 86 obs

○A3.174.59.1082026-05-06 → 2026-06-01 · 70 obs

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○A3.174.59.1252026-05-06 → 2026-06-01 · 70 obs

○A3.174.59.572026-05-06 → 2026-06-01 · 70 obs

○A3.174.59.892026-05-06 → 2026-06-01 · 70 obs

○A52.84.118.1192026-04-11 → 2026-06-02 · 165 obs

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○A52.84.118.462026-04-11 → 2026-06-02 · 165 obs

○A52.84.118.512026-04-11 → 2026-06-02 · 165 obs

○A52.84.118.842026-04-11 → 2026-06-02 · 165 obs

○CNAME(0x636f636b)y-golick-f0842a.netlify.com2018-09-20 → 2018-09-20 · 3 obs

● 2018-09-20 01:28:52
○ 2026-04-10 20:56:30
○ 2026-06-03 14:55:08

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
io	a0.nic.io, c0.nic.io, b0.nic.io, a2.nic.io	-
offcourse.io	ns-1375.awsdns-43.org, ns-352.awsdns-44.com, ns-623.awsdns-13.net, ns-1763.awsdns-28.co.uk	-

✅ Authoritative Response

Server:205.251.197.95

NS records: ns-1375.awsdns-43.org, ns-352.awsdns-44.com, ns-623.awsdns-13.net, ns-1763.awsdns-28.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for offcourse.io (unsigned zone)

⏱️ Timing

Total: 3989ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`13.227.207.93, 13.227.207.129...`

Analysis

IP Addresses

www.offcourse.io has 4 IP addresses: 13.227.207.31, 13.227.207.93, 13.227.207.103 and 13.227.207.129.

www.offcourse.io - robtex.com

www.offcourse.io

offcourse.io

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

`www.offcourse.io`

`offcourse.io`