`practical-go-lessons.com`

DNSSEC	⚠️ Not signed
A	18.155.21.5^{🇺🇸 Amazon18.155.16.0/21}
		PTR	`server-18-155-21-5.gru3.r.cloudfront.net`
A	18.155.21.17^{🇺🇸 Amazon18.155.16.0/21}
A	18.155.21.105^{🇺🇸 Amazon18.155.16.0/21}
A	18.155.21.120^{🇺🇸 Amazon18.155.16.0/21}
NS	`ns-2033.awsdns-62.co.uk` ⭐
		A	2600:9000:5307:f100::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-2033.awsdns-62.co.uk`
		A	205.251.199.241^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-2033.awsdns-62.co.uk`
NS	`ns-1136.awsdns-14.org`
		A	2600:9000:5304:7000::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1136.awsdns-14.org`
		A	205.251.196.112^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1136.awsdns-14.org`
NS	`ns-249.awsdns-31.com`
		A	2600:9000:5300:f900::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-249.awsdns-31.com`
		A	205.251.192.249^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-249.awsdns-31.com`
NS	`ns-693.awsdns-22.net`
		A	2600:9000:5302:b500::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-693.awsdns-22.net`
		A	205.251.194.181^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-693.awsdns-22.net`
MX	`inbound-smtp.eu-west-1.amazonaws.com` ⭐
		A	18.200.203.69^{🇮🇪 Amazon18.200.0.0/16 EC2 DUB prefix}
			PTR	`ec2-18-200-203-69.eu-west-1.compute.amazonaws.com`
		A	54.76.31.185^{🇮🇪 Amazon54.76.0.0/15 EC2 DUB prefix}
			PTR	`ec2-54-76-31-185.eu-west-1.compute.amazonaws.com`
		A	54.155.140.59^{🇮🇪 Amazon54.155.0.0/16 EC2 DUB prefix}
			PTR	`ec2-54-155-140-59.eu-west-1.compute.amazonaws.com`
TXT	`google-site-verification=-QSPMXKTeQSUswqYBgMZgGGwv0TfPmyNana5wNlvbw0`
TXT	`v=spf1 include:amazonses.com ~all`
SOA	`ns-2033.awsdns-62.co.uk`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=1780385814

Same first word

practical-go-lessons.com

DNS History

41 records (9 active, 32 former)

●NSns-1136.awsdns-14.org2026-05-01 → 2026-06-02 · 2 obs

● 2026-05-01 10:07:52
● 2026-06-02 07:58:50

●NSns-2033.awsdns-62.co.uk2026-05-01 → 2026-06-02 · 2 obs

● 2026-05-01 10:07:52
● 2026-06-02 07:58:50

●NSns-249.awsdns-31.com2026-05-01 → 2026-06-02 · 2 obs

● 2026-05-01 10:07:52
● 2026-06-02 07:58:50

●NSns-693.awsdns-22.net2026-05-01 → 2026-06-02 · 2 obs

● 2026-05-01 10:07:52
● 2026-06-02 07:58:50

●MXinbound-smtp.eu-west-1.amazonaws.com2026-05-01 → 2026-06-02 · 2 obs

● 2026-05-01 10:07:52
● 2026-06-02 07:58:50

○A108.138.233.202026-05-01 → 2026-05-19 · 37 obs

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

○A108.138.233.792026-05-01 → 2026-05-19 · 37 obs

○A108.138.233.842026-05-01 → 2026-05-19 · 37 obs

○A108.138.233.962026-05-01 → 2026-05-19 · 37 obs

○A108.138.85.1282026-05-25 → 2026-05-26 · 7 obs

○ 2026-05-24 23:36:10
● 2026-05-25 02:09:44
○ 2026-05-25 05:17:56
● 2026-05-25 06:21:08
● 2026-05-26 15:42:08
○ 2026-05-27 07:02:00
○ 2026-06-02 07:58:50

○A108.138.85.202026-05-25 → 2026-05-26 · 7 obs

○ 2026-05-24 23:36:10
● 2026-05-25 02:09:44
○ 2026-05-25 05:17:56
● 2026-05-25 06:21:08
● 2026-05-26 15:42:08
○ 2026-05-27 07:02:00
○ 2026-06-02 07:58:50

○A108.138.85.392026-05-25 → 2026-05-26 · 7 obs

○ 2026-05-24 23:36:10
● 2026-05-25 02:09:44
○ 2026-05-25 05:17:56
● 2026-05-25 06:21:08
● 2026-05-26 15:42:08
○ 2026-05-27 07:02:00
○ 2026-06-02 07:58:50

○A108.138.85.732026-05-25 → 2026-05-26 · 7 obs

○ 2026-05-24 23:36:10
● 2026-05-25 02:09:44
○ 2026-05-25 05:17:56
● 2026-05-25 06:21:08
● 2026-05-26 15:42:08
○ 2026-05-27 07:02:00
○ 2026-06-02 07:58:50

○A108.158.186.1102026-05-06 → 2026-06-01 · 12 obs

○ 2026-05-05 13:17:12
● 2026-05-06 00:33:16
● 2026-05-06 02:27:18
○ 2026-05-06 07:37:10
○ 2026-05-17 12:04:14
● 2026-05-18 02:18:26
● 2026-05-18 07:52:20
○ 2026-05-18 10:48:28
○ 2026-06-01 19:03:34
● 2026-06-01 20:38:18
○ 2026-06-01 21:53:10
○ 2026-06-02 07:58:50

○A108.158.186.1112026-05-06 → 2026-06-01 · 12 obs

○A108.158.186.612026-05-06 → 2026-06-01 · 12 obs

○A108.158.186.762026-05-06 → 2026-06-01 · 12 obs

○A13.33.109.1032026-05-04 → 2026-05-19 · 29 obs

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

○A13.33.109.162026-05-04 → 2026-05-19 · 29 obs

○A13.33.109.302026-05-04 → 2026-05-19 · 29 obs

○A13.33.109.812026-05-04 → 2026-05-19 · 29 obs

○A13.35.20.1062026-05-29 → 2026-06-01 · 7 obs

○ 2026-05-29 11:08:04
● 2026-05-29 18:29:00
○ 2026-05-29 19:19:54
○ 2026-05-31 17:56:30
● 2026-06-01 19:03:34
○ 2026-06-01 20:38:18
○ 2026-06-02 07:58:50

○A13.35.20.1152026-05-29 → 2026-06-01 · 7 obs

○ 2026-05-29 11:08:04
● 2026-05-29 18:29:00
○ 2026-05-29 19:19:54
○ 2026-05-31 17:56:30
● 2026-06-01 19:03:34
○ 2026-06-01 20:38:18
○ 2026-06-02 07:58:50

○A13.35.20.382026-05-29 → 2026-06-01 · 7 obs

○ 2026-05-29 11:08:04
● 2026-05-29 18:29:00
○ 2026-05-29 19:19:54
○ 2026-05-31 17:56:30
● 2026-06-01 19:03:34
○ 2026-06-01 20:38:18
○ 2026-06-02 07:58:50

○A13.35.20.432026-05-29 → 2026-06-01 · 7 obs

○ 2026-05-29 11:08:04
● 2026-05-29 18:29:00
○ 2026-05-29 19:19:54
○ 2026-05-31 17:56:30
● 2026-06-01 19:03:34
○ 2026-06-01 20:38:18
○ 2026-06-02 07:58:50

●A18.155.21.1052026-05-29 → 2026-06-02 · 11 obs

○ 2026-05-27 16:41:58
● 2026-05-29 11:08:04
○ 2026-05-29 18:29:00
● 2026-05-29 19:19:54
● 2026-05-30 09:11:32
○ 2026-05-30 14:28:14
● 2026-05-31 17:56:30
○ 2026-06-01 19:03:34
○ 2026-06-01 21:53:10
● 2026-06-02 07:58:48
● 2026-06-02 07:58:50

●A18.155.21.1202026-05-29 → 2026-06-02 · 11 obs

●A18.155.21.172026-05-29 → 2026-06-02 · 11 obs

●A18.155.21.52026-05-29 → 2026-06-02 · 11 obs

○A3.162.247.1082026-05-01 → 2026-05-14 · 11 obs

● 2026-05-01 10:07:52
○ 2026-05-01 14:43:04
● 2026-05-03 02:32:36
○ 2026-05-04 08:43:58
○ 2026-05-05 03:00:30
● 2026-05-05 11:08:08
○ 2026-05-05 13:17:12
○ 2026-05-14 07:10:40
● 2026-05-14 17:22:06
○ 2026-05-15 01:40:44
○ 2026-06-02 07:58:50

○A3.162.247.1272026-05-01 → 2026-05-14 · 11 obs

○A3.162.247.282026-05-01 → 2026-05-14 · 11 obs

○A3.162.247.992026-05-01 → 2026-05-14 · 11 obs

○A3.167.163.1132026-05-20 → 2026-06-01 · 18 obs

○ 2026-05-19 03:51:54
● 2026-05-20 15:53:38
● 2026-05-24 23:36:10
○ 2026-05-25 02:09:44
● 2026-05-25 05:17:56
○ 2026-05-25 06:21:08
○ 2026-05-27 07:02:00
● 2026-05-27 10:00:40
○ 2026-05-27 13:03:16
● 2026-05-27 16:41:58
○ 2026-05-29 11:08:04
○ 2026-05-30 09:11:32
● 2026-05-30 14:28:14
○ 2026-05-31 17:56:30
○ 2026-06-01 20:38:18
● 2026-06-01 21:53:10
○ 2026-06-02 07:58:48
○ 2026-06-02 07:58:50

○A3.167.163.182026-05-20 → 2026-06-01 · 18 obs

○A3.167.163.372026-05-20 → 2026-06-01 · 18 obs

○A3.167.163.912026-05-20 → 2026-06-01 · 18 obs

○A99.86.20.102026-05-27 → 2026-05-27 · 6 obs

○ 2026-05-26 15:42:08
● 2026-05-27 07:02:00
○ 2026-05-27 10:00:40
● 2026-05-27 13:03:16
○ 2026-05-27 16:41:58
○ 2026-06-02 07:58:50

○A99.86.20.1092026-05-27 → 2026-05-27 · 6 obs

○ 2026-05-26 15:42:08
● 2026-05-27 07:02:00
○ 2026-05-27 10:00:40
● 2026-05-27 13:03:16
○ 2026-05-27 16:41:58
○ 2026-06-02 07:58:50

○A99.86.20.1212026-05-27 → 2026-05-27 · 6 obs

○ 2026-05-26 15:42:08
● 2026-05-27 07:02:00
○ 2026-05-27 10:00:40
● 2026-05-27 13:03:16
○ 2026-05-27 16:41:58
○ 2026-06-02 07:58:50

○A99.86.20.372026-05-27 → 2026-05-27 · 6 obs

○ 2026-05-26 15:42:08
● 2026-05-27 07:02:00
○ 2026-05-27 10:00:40
● 2026-05-27 13:03:16
○ 2026-05-27 16:41:58
○ 2026-06-02 07:58:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
practical-go-lessons.com	ns-249.awsdns-31.com, ns-693.awsdns-22.net, ns-1136.awsdns-14.org, ns-2033.awsdns-62.co.uk	2 records

✅ Authoritative Response

Server:205.251.194.181

NS records: ns-249.awsdns-31.com, ns-693.awsdns-22.net, ns-1136.awsdns-14.org, ns-2033.awsdns-62.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for practical-go-lessons.com (unsigned zone)

⏱️ Timing

Total: 1303ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`18.155.21.120, 18.155.21.105...`
NS	4	`ns-1136.awsdns-14.org, ns-2033.awsdns-62.co.uk...`
MX	1	`inbound-smtp.eu-west-1.amazonaws.com (pr`
TXT	2	`google-site-verification=-QSPMXKTeQSUswq, v=spf1 include:amazonses.com ~all`
SOA	1	`ns-2033.awsdns-62.co.uk awsdns-hostmaste`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-249.awsdns-31.com, ns-249.awsdns-31.com)

Analysis

IP Addresses

practical-go-lessons.com points to 4 IP addresses — 18.155.21.5, 18.155.21.17, 18.155.21.105 and 18.155.21.120.

Name Servers

practical-go-lessons.com carries NS records pointing to 4 name servers: ns-249.awsdns-31.com, ns-693.awsdns-22.net, ns-1136.awsdns-14.org and ns-2033.awsdns-62.co.uk.

practical-go-lessons.com has at least partial name server overlap with other domains, such as p26-mailws.icloud.com, zeit-hoster.de, duplicatefilesremover.com and two others.

It is common to find these name servers paired with the name servers ns-2043.awsdns-63.co.uk, ns-42.awsdns-05.com, ns-1785.awsdns-31.co.uk and ns-1380.awsdns-44.org.

ns-249.awsdns-31.com, ns-693.awsdns-22.net, ns-1136.awsdns-14.org and ns-2033.awsdns-62.co.uk all point to exactly two IP numbers each: ns-249.awsdns-31.com → 205.251.192.249 and 2600:9000:5300:f900::1; ns-693.awsdns-22.net → 205.251.194.181 and 2600:9000:5302:b500::1; ns-1136.awsdns-14.org → 205.251.196.112 and 2600:9000:5304:7000::1; ns-2033.awsdns-62.co.uk → 205.251.199.241 and 2600:9000:5307:f100::1.

Mail Servers

practical-go-lessons.com uses one mail server — inbound-smtp.eu-west-1.amazonaws.com.

The mail server setup of practical-go-lessons.com matches that of other domains such as dev-nil.com, openplanit.com, slot(0x736578)pert.com and two others.

At least some of the mail servers used by practical-go-lessons.com are shared with other domains: ounass.ae, proticaret.istanbul, lifecycles.io and two others among them.

These mail servers tend to be used in combination with the mail servers aspmx.l.google.com and alt2.aspmx.l.google.com.

inbound-smtp.eu-west-1.amazonaws.com resolves to a set of three IP numbers: 18.200.203.69, 54.76.31.185 and 54.155.140.59.

practical-go-lessons.com - robtex.com