computingmasterclass.com - dns.ninja

`computingmasterclass.com`

DNSSEC	⚠️ Not signed
A	3.171.61.5^{🇺🇸 Amazon3.171.60.0/23}
		PTR	`server-3-171-61-5.iad61.r.cloudfront.net`
A	3.171.61.32^{🇺🇸 Amazon3.171.60.0/23}
A	3.171.61.60^{🇺🇸 Amazon3.171.60.0/23}
A	3.171.61.118^{🇺🇸 Amazon3.171.60.0/23}
NS	`ns-1277.awsdns-31.org` ⭐
		A	2600:9000:5304:fd00::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1277.awsdns-31.org`
		A	205.251.196.253^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1277.awsdns-31.org`
NS	`ns-1687.awsdns-18.co.uk`
		A	2600:9000:5306:9700::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1687.awsdns-18.co.uk`
		A	205.251.198.151^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1687.awsdns-18.co.uk`
NS	`ns-226.awsdns-28.com`
		A	2600:9000:5300:e200::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-226.awsdns-28.com`
		A	205.251.192.226^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-226.awsdns-28.com`
NS	`ns-739.awsdns-28.net`
		A	2600:9000:5302:e300::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-739.awsdns-28.net`
		A	205.251.194.227^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-739.awsdns-28.net`
MX	`inbound-smtp.us-east-1.amazonaws.com` ⭐
		A	3.211.210.226^{🇺🇸 Amazon3.208.0.0/12 EC2 IAD prefix}
			PTR	`ec2-3-211-210-226.compute-1.amazonaws.com`
		A	44.206.9.87^{🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix}
			PTR	`ec2-44-206-9-87.compute-1.amazonaws.com`
		A	44.210.166.32^{🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix}
			PTR	`ec2-44-210-166-32.compute-1.amazonaws.com`
		A	54.164.173.191^{🇺🇸 Amazon54.164.0.0/15 EC2 IAD prefix}
			PTR	`ec2-54-164-173-191.compute-1.amazonaws.com`
		A	54.197.5.236^{🇺🇸 Amazon54.196.0.0/15 EC2 IAD 54.196.0.0/15}
			PTR	`ec2-54-197-5-236.compute-1.amazonaws.com`
TXT	`google-site-verification=gGFpiz10avl2sEClT_vFP36EpsqMNhry8w6QNB7PVq8`
SOA	`ns-1277.awsdns-31.org`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=1781872085

Same first word

computingmasterclass.com

DNS History

73 records (9 active, 64 former)

●NSns-1277.awsdns-31.org2026-02-15 → 2026-06-19 · 2 obs

● 2026-02-15 10:29:12
● 2026-06-19 12:32:10

●NSns-1687.awsdns-18.co.uk2026-02-15 → 2026-06-19 · 2 obs

● 2026-02-15 10:29:12
● 2026-06-19 12:32:10

●NSns-226.awsdns-28.com2026-02-15 → 2026-06-19 · 2 obs

● 2026-02-15 10:29:12
● 2026-06-19 12:32:10

●NSns-739.awsdns-28.net2026-02-15 → 2026-06-19 · 2 obs

● 2026-02-15 10:29:12
● 2026-06-19 12:32:10

●MXinbound-smtp.us-east-1.amazonaws.com2026-02-15 → 2026-06-19 · 2 obs

● 2026-02-15 10:29:12
● 2026-06-19 12:32:10

○A108.158.194.1182026-03-29 → 2026-05-25 · 98 obs

○ 2026-03-25 00:13:08
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○ 2026-06-19 12:32:10

○A108.158.194.372026-03-29 → 2026-05-25 · 98 obs

○A108.158.194.742026-03-29 → 2026-05-25 · 98 obs

○A108.158.194.752026-03-29 → 2026-05-25 · 98 obs

○A13.227.207.1122026-04-05 → 2026-06-10 · 68 obs

○ 2026-04-05 04:58:22
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○A13.227.207.1132026-04-05 → 2026-06-10 · 68 obs

○A13.227.207.1252026-04-05 → 2026-06-10 · 68 obs

○A13.227.207.242026-04-05 → 2026-06-10 · 68 obs

○A13.249.96.432026-06-17 → 2026-06-17 · 4 obs

○ 2026-06-16 06:26:44
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○A13.249.96.732026-06-17 → 2026-06-17 · 4 obs

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○A13.249.96.762026-06-17 → 2026-06-17 · 4 obs

○ 2026-06-16 06:26:44
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○A13.249.96.892026-06-17 → 2026-06-17 · 4 obs

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○A13.33.153.432026-02-18 → 2026-06-18 · 147 obs

○ 2026-02-17 00:56:10
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○A13.33.153.572026-02-18 → 2026-06-18 · 147 obs

○A13.33.153.812026-02-18 → 2026-06-18 · 147 obs

○A13.33.153.982026-02-18 → 2026-06-18 · 147 obs

○A13.33.82.112026-04-21 → 2026-05-08 · 41 obs

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○A13.33.82.1132026-04-21 → 2026-05-08 · 41 obs

○A13.33.82.552026-04-21 → 2026-05-08 · 41 obs

○A13.33.82.722026-04-21 → 2026-05-08 · 41 obs

○A18.160.78.1012026-03-30 → 2026-06-19 · 26 obs

○ 2026-03-30 11:06:22
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○A18.160.78.302026-03-30 → 2026-06-19 · 26 obs

○A18.160.78.622026-03-30 → 2026-06-19 · 26 obs

○A18.160.78.92026-03-30 → 2026-06-19 · 26 obs

○A18.165.140.1272026-03-24 → 2026-03-24 · 4 obs

○ 2026-03-19 23:08:52
● 2026-03-24 15:34:28
○ 2026-03-25 00:13:08
○ 2026-06-19 12:32:10

○A18.165.140.332026-03-24 → 2026-03-24 · 4 obs

○ 2026-03-19 23:08:52
● 2026-03-24 15:34:28
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○A18.165.140.492026-03-24 → 2026-03-24 · 4 obs

○ 2026-03-19 23:08:52
● 2026-03-24 15:34:28
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○A18.165.140.542026-03-24 → 2026-03-24 · 4 obs

○ 2026-03-19 23:08:52
● 2026-03-24 15:34:28
○ 2026-03-25 00:13:08
○ 2026-06-19 12:32:10

○A18.239.168.1032026-05-10 → 2026-05-20 · 16 obs

○ 2026-05-10 13:58:04
● 2026-05-10 16:42:52
○ 2026-05-10 20:40:02
○ 2026-05-12 07:32:26
● 2026-05-12 08:37:56
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○ 2026-05-20 04:20:14
○ 2026-06-19 12:32:10

○A18.239.168.202026-05-10 → 2026-05-20 · 16 obs

○A18.239.168.382026-05-10 → 2026-05-20 · 16 obs

○A18.239.168.72026-05-10 → 2026-05-20 · 16 obs

○A18.64.207.1122026-04-27 → 2026-05-19 · 38 obs

○ 2026-04-27 15:17:40
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○ 2026-05-19 09:41:00
○ 2026-06-19 12:32:10

○A18.64.207.22026-04-27 → 2026-05-19 · 38 obs

○A18.64.207.202026-04-27 → 2026-05-19 · 38 obs

○A18.64.207.952026-04-27 → 2026-05-19 · 38 obs

○A18.65.25.1122026-03-19 → 2026-03-19 · 6 obs

○ 2026-03-09 23:15:38
● 2026-03-19 02:27:14
○ 2026-03-19 11:33:42
● 2026-03-19 22:07:34
○ 2026-03-19 23:08:52
○ 2026-06-19 12:32:10

○A18.65.25.232026-03-19 → 2026-03-19 · 6 obs

○ 2026-03-09 23:15:38
● 2026-03-19 02:27:14
○ 2026-03-19 11:33:42
● 2026-03-19 22:07:34
○ 2026-03-19 23:08:52
○ 2026-06-19 12:32:10

○A18.65.25.612026-03-19 → 2026-03-19 · 6 obs

○ 2026-03-09 23:15:38
● 2026-03-19 02:27:14
○ 2026-03-19 11:33:42
● 2026-03-19 22:07:34
○ 2026-03-19 23:08:52
○ 2026-06-19 12:32:10

○A18.65.25.772026-03-19 → 2026-03-19 · 6 obs

○ 2026-03-09 23:15:38
● 2026-03-19 02:27:14
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● 2026-03-19 22:07:34
○ 2026-03-19 23:08:52
○ 2026-06-19 12:32:10

○A18.67.233.402026-05-30 → 2026-06-05 · 19 obs

○ 2026-05-30 13:08:08
● 2026-05-30 14:19:56
○ 2026-05-30 18:20:40
○ 2026-06-01 12:54:54
● 2026-06-01 18:52:06
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● 2026-06-02 14:53:06
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● 2026-06-04 19:28:08
○ 2026-06-04 20:22:52
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○ 2026-06-06 01:49:42
○ 2026-06-19 12:32:10

○A18.67.233.52026-05-30 → 2026-06-05 · 19 obs

○A18.67.233.652026-05-30 → 2026-06-05 · 19 obs

○A18.67.233.832026-05-30 → 2026-06-05 · 19 obs

○A3.170.152.1202026-05-19 → 2026-06-08 · 75 obs

○ 2026-05-19 15:53:56
● 2026-05-19 19:07:54
● 2026-05-20 00:22:54
○ 2026-05-20 03:01:26
● 2026-05-20 04:20:14
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○ 2026-05-22 09:32:00
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○ 2026-05-25 19:08:32
○ 2026-05-26 03:36:42
● 2026-05-26 04:56:24
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○ 2026-05-28 06:22:54
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● 2026-05-30 00:39:02
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○ 2026-06-04 21:47:50
● 2026-06-04 22:24:20
● 2026-06-05 03:38:58
○ 2026-06-05 08:24:08
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● 2026-06-06 01:49:42
○ 2026-06-06 13:49:28
○ 2026-06-06 18:10:28
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○ 2026-06-08 13:53:42
○ 2026-06-19 12:32:10

○A3.170.152.402026-05-19 → 2026-06-08 · 75 obs

○A3.170.152.692026-05-19 → 2026-06-08 · 75 obs

○A3.170.152.752026-05-19 → 2026-06-08 · 75 obs

●A3.171.61.1182026-02-15 → 2026-06-19 · 40 obs

● 2026-02-15 10:29:12
● 2026-02-17 00:56:10
○ 2026-02-18 22:55:54
● 2026-02-21 14:21:36
● 2026-03-09 20:09:38
○ 2026-03-09 23:15:38
○ 2026-03-19 02:27:14
● 2026-03-19 11:33:42
○ 2026-03-19 22:07:34
○ 2026-03-24 15:34:28
● 2026-03-25 00:13:08
○ 2026-03-29 09:07:06
○ 2026-04-18 06:32:08
● 2026-04-19 23:09:50
○ 2026-04-21 19:21:28
○ 2026-05-22 08:31:48
● 2026-05-22 09:32:00
○ 2026-05-22 16:45:12
● 2026-05-22 21:02:30
○ 2026-05-23 00:55:26
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● 2026-05-25 10:38:48
○ 2026-05-25 15:54:34
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● 2026-05-26 03:36:42
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○ 2026-06-11 05:56:24
● 2026-06-11 10:08:06
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● 2026-06-12 17:36:50
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● 2026-06-15 21:04:38
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● 2026-06-19 09:08:58
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● 2026-06-19 12:32:06
● 2026-06-19 12:32:10

●A3.171.61.322026-02-15 → 2026-06-19 · 40 obs

●A3.171.61.52026-02-15 → 2026-06-19 · 40 obs

●A3.171.61.602026-02-15 → 2026-06-19 · 40 obs

○A3.174.26.372026-05-18 → 2026-06-08 · 8 obs

○ 2026-05-18 09:23:24
● 2026-05-18 21:41:36
● 2026-05-18 22:16:14
○ 2026-05-19 03:07:12
○ 2026-06-08 00:03:02
● 2026-06-08 01:36:32
○ 2026-06-08 04:42:02
○ 2026-06-19 12:32:10

○A3.174.26.52026-05-18 → 2026-06-08 · 8 obs

○ 2026-05-18 09:23:24
● 2026-05-18 21:41:36
● 2026-05-18 22:16:14
○ 2026-05-19 03:07:12
○ 2026-06-08 00:03:02
● 2026-06-08 01:36:32
○ 2026-06-08 04:42:02
○ 2026-06-19 12:32:10

○A3.174.26.582026-05-18 → 2026-06-08 · 8 obs

○ 2026-05-18 09:23:24
● 2026-05-18 21:41:36
● 2026-05-18 22:16:14
○ 2026-05-19 03:07:12
○ 2026-06-08 00:03:02
● 2026-06-08 01:36:32
○ 2026-06-08 04:42:02
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○A3.174.26.752026-05-18 → 2026-06-08 · 8 obs

○ 2026-05-18 09:23:24
● 2026-05-18 21:41:36
● 2026-05-18 22:16:14
○ 2026-05-19 03:07:12
○ 2026-06-08 00:03:02
● 2026-06-08 01:36:32
○ 2026-06-08 04:42:02
○ 2026-06-19 12:32:10

○A3.174.29.1232026-04-12 → 2026-04-14 · 7 obs

○ 2026-04-08 23:25:58
● 2026-04-12 10:10:06
○ 2026-04-12 11:47:12
○ 2026-04-13 13:49:22
● 2026-04-14 17:03:22
○ 2026-04-14 18:58:44
○ 2026-06-19 12:32:10

○A3.174.29.902026-04-12 → 2026-04-14 · 7 obs

○ 2026-04-08 23:25:58
● 2026-04-12 10:10:06
○ 2026-04-12 11:47:12
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● 2026-04-14 17:03:22
○ 2026-04-14 18:58:44
○ 2026-06-19 12:32:10

○A3.174.29.912026-04-12 → 2026-04-14 · 7 obs

○ 2026-04-08 23:25:58
● 2026-04-12 10:10:06
○ 2026-04-12 11:47:12
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● 2026-04-14 17:03:22
○ 2026-04-14 18:58:44
○ 2026-06-19 12:32:10

○A3.174.29.922026-04-12 → 2026-04-14 · 7 obs

○ 2026-04-08 23:25:58
● 2026-04-12 10:10:06
○ 2026-04-12 11:47:12
○ 2026-04-13 13:49:22
● 2026-04-14 17:03:22
○ 2026-04-14 18:58:44
○ 2026-06-19 12:32:10

○A52.84.80.1002026-06-10 → 2026-06-16 · 20 obs

○ 2026-06-10 21:12:42
● 2026-06-10 23:08:24
● 2026-06-11 05:56:24
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● 2026-06-16 03:04:48
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○A52.84.80.1192026-06-10 → 2026-06-16 · 20 obs

○A52.84.80.362026-06-10 → 2026-06-16 · 20 obs

○A52.84.80.642026-06-10 → 2026-06-16 · 20 obs

○A65.8.76.1072026-05-28 → 2026-05-29 · 7 obs

○ 2026-05-26 11:21:10
● 2026-05-28 06:22:54
○ 2026-05-28 10:25:24
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● 2026-05-29 04:06:32
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○A65.8.76.482026-05-28 → 2026-05-29 · 7 obs

○ 2026-05-26 11:21:10
● 2026-05-28 06:22:54
○ 2026-05-28 10:25:24
○ 2026-05-28 18:17:44
● 2026-05-29 04:06:32
○ 2026-05-29 07:51:44
○ 2026-06-19 12:32:10

○A65.8.76.662026-05-28 → 2026-05-29 · 7 obs

○ 2026-05-26 11:21:10
● 2026-05-28 06:22:54
○ 2026-05-28 10:25:24
○ 2026-05-28 18:17:44
● 2026-05-29 04:06:32
○ 2026-05-29 07:51:44
○ 2026-06-19 12:32:10

○A65.8.76.832026-05-28 → 2026-05-29 · 7 obs

○ 2026-05-26 11:21:10
● 2026-05-28 06:22:54
○ 2026-05-28 10:25:24
○ 2026-05-28 18:17:44
● 2026-05-29 04:06:32
○ 2026-05-29 07:51:44
○ 2026-06-19 12:32:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, c.gtld-servers.net, h.gtld-servers.net, e.gtld-servers.net...	-
computingmasterclass.com	ns-226.awsdns-28.com, ns-739.awsdns-28.net, ns-1687.awsdns-18.co.uk, ns-1277.awsdns-31.org	2 records

✅ Authoritative Response

Server:205.251.192.226

NS records: ns-226.awsdns-28.com, ns-739.awsdns-28.net, ns-1687.awsdns-18.co.uk, ns-1277.awsdns-31.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for computingmasterclass.com (unsigned zone)

⏱️ Timing

Total: 1480ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`3.171.61.60, 3.171.61.5...`
NS	4	`ns-1277.awsdns-31.org, ns-1687.awsdns-18.co.uk...`
MX	1	`inbound-smtp.us-east-1.amazonaws.com (pr`
TXT	1	`google-site-verification=gGFpiz10avl2sEC`
SOA	1	`ns-1277.awsdns-31.org awsdns-hostmaster.`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-226.awsdns-28.com, ns-226.awsdns-28.com)

Analysis

IP Addresses

computingmasterclass.com resolves to four IP addresses: 3.171.61.5, 3.171.61.32, 3.171.61.60 and 3.171.61.118.

Name Servers

The NS records for computingmasterclass.com point to four name servers: ns-226.awsdns-28.com, ns-739.awsdns-28.net, ns-1277.awsdns-31.org and ns-1687.awsdns-18.co.uk.

computingmasterclass.com has at least partial name server overlap with other domains, such as bisno.com, londonmining.co.uk, musicencyclopedias.com and two others.

ns-226.awsdns-28.com, ns-739.awsdns-28.net, ns-1277.awsdns-31.org and ns-1687.awsdns-18.co.uk all point to exactly two IP numbers each: ns-226.awsdns-28.com → 205.251.192.226 and 2600:9000:5300:e200::1; ns-739.awsdns-28.net → 205.251.194.227 and 2600:9000:5302:e300::1; ns-1277.awsdns-31.org → 205.251.196.253 and 2600:9000:5304:fd00::1; ns-1687.awsdns-18.co.uk → 205.251.198.151 and 2600:9000:5306:9700::1.

Mail Servers

The sole mail server for computingmasterclass.com is inbound-smtp.us-east-1.amazonaws.com.

Among the domains sharing a mail server setup with computingmasterclass.com are sacinternal.com, tax.a2z.com, pole-lc-spe.slack.com and two others.

There is at least a partial MX overlap between computingmasterclass.com and other domains, including misnet.atlassian.net, subwaytech.com, zpgltd.atlassian.net and two others.

These mail servers often co-occur with the mail servers inbound-smtp.us-west-2.amazonaws.com.

inbound-smtp.us-east-1.amazonaws.com resolves to five IP numbers: 3.211.210.226, 44.206.9.87, 44.210.166.32 and two others.