ROBTEX.COM - thegreatcourses.com

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thegreatcourses.com checked at 2026-01-03T20:55:41.577Z 222ms 170/170/170 100% R:9 allDone:true timedOut:false cfaller:fa9341c6/0:83b89975:19630:undefined

`thegreatcourses.com`

NS	`ns-359.awsdns-44.com`
		A	2600:9000:5301:6700::1^{🇺🇸 Amazon}
			PTR	`ns-359.awsdns-44.com`
		A	205.251.193.103^{🇺🇸 Amazon}
			PTR	`ns-359.awsdns-44.com`
NS	`ns-546.awsdns-04.net`
		A	2600:9000:5302:2200::1^{🇺🇸 Amazon}
			PTR	`ns-546.awsdns-04.net`
		A	205.251.194.34^{🇺🇸 Amazon}
			PTR	`ns-546.awsdns-04.net`
NS	`ns-1093.awsdns-08.org`
		A	2600:9000:5304:4500::1^{🇺🇸 Amazon}
			PTR	`ns-1093.awsdns-08.org`
		A	205.251.196.69^{🇺🇸 Amazon}
			PTR	`ns-1093.awsdns-08.org`
MX	`cluster2.us.messagelabs.com`
		A	67.219.246.210^{🇺🇸 Google}
			PTR	`mail909.messagelabs.com`
		A	67.219.246.215^{🇺🇸 Google}
			PTR	`mail901.messagelabs.com`
		A	67.219.247.106^{🇺🇸 Google}
			PTR	`mail923.messagelabs.com`
		A	67.219.247.202^{🇺🇸 Google}
			PTR	`mail930.messagelabs.com`
		A	67.219.247.204^{🇺🇸 Google}
			PTR	`mail931.messagelabs.com`
		A	67.219.250.212^{🇺🇸 Google}
			PTR	`mail943.messagelabs.com`
		A	67.219.250.215^{🇺🇸 Google}
			PTR	`mail948.messagelabs.com`
		A	67.219.250.218^{🇺🇸 Google}
			PTR	`mail951.messagelabs.com`
MX	`cluster2a.us.messagelabs.com`
		A	34.75.172.113^{🇺🇸 Google}
			PTR	`113.172.75.34.bc.googleusercontent.com`
NS	`ns-1953.awsdns-52.co.uk`
		A	2600:9000:5307:a100::1^{🇺🇸 Amazon}
			PTR	`ns-1953.awsdns-52.co.uk`
		A	205.251.199.161^{🇺🇸 Amazon}
			PTR	`ns-1953.awsdns-52.co.uk`
MX	`thegreatcourses-com.mail.protection.outlook.com`
		A	2a01:111:f403:c803::^{🇺🇸 Microsoft}
			PTR	`mail-bn1pr21cu00200.inbound.protection.outlook.com`
		A	2a01:111:f403:c902::4^{🇺🇸 Microsoft}
			PTR	`mail-sj0pr03cu01504.inbound.protection.outlook.com`
		A	2a01:111:f403:c92c::3^{🇺🇸 Microsoft}
			PTR	`mail-dm5pr04cu00103.inbound.protection.outlook.com`
		A	2a01:111:f403:c946::7^{🇺🇸 Microsoft}
			PTR	`mail-ch5pr02cu00307.inbound.protection.outlook.com`
		A	52.101.8.44^{🇺🇸 Microsoft}
			PTR	`mail-dm5pr04cu00104.inbound.protection.outlook.com`
		A	52.101.11.17^{🇺🇸 Microsoft}
			PTR	`mail-sn1pr0501cu00301.inbound.protection.outlook.com`
		A	52.101.41.26^{🇺🇸 Microsoft}
			PTR	`mail-sj0pr03cu01702.inbound.protection.outlook.com`
		A	52.101.42.6^{🇺🇸 Microsoft}
			PTR	`mail-mw2pr02cu00306.inbound.protection.outlook.com`
A	3.229.249.154^{🇺🇸 Amazon}
		PTR	`ec2-3-229-249-154.compute-1.amazonaws.com`
A	100.51.235.253^{🇺🇸 Amazon}
		PTR	`ec2-100-51-235-253.compute-1.amazonaws.com`

`com`

	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`

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Up

lib.thegreatcourses.com

www.thegreatcourses.com

Starts with same word

thegreatcourses.com

thegreatcourses.co.uk

Starts similarily

thegreatcourses.com

thegreatcourses.co.uk

AI analysis

thegreatcourses.com is the parent of lib.thegreatcourses.com and www.thegreatcourses.com.

Two IP numbers are pointed to by thegreatcourses.com: 3.229.249.154 and 100.51.235.253.

Other host names, for instance www.thegreatcourses.co.uk and thegreatcourses.co.uk, share IP numbers with thegreatcourses.com.

thegreatcourses.com delegates to four name servers: ns-359.awsdns-44.com, ns-546.awsdns-04.net, ns-1093.awsdns-08.org and ns-1953.awsdns-52.co.uk.

thegreatcourses.com at least partially shares name servers with other domains, for instance e-postcodeloterij.com, ewallet.com.au, suco777.cc, californiaseismic.com and newcastlegateshead.com.

these name servers are commonly used alongside the name servers ns-948.awsdns-54.net, ns-374.awsdns-46.com, ns-1044.awsdns-02.org, ns-1260.awsdns-29.org, ns-875.awsdns-45.net, ns-986.awsdns-59.net and ns-1307.awsdns-35.org.

Host names with two IP numbers: ns-359.awsdns-44.com points to 2600:9000:5301:6700::1 and 205.251.193.103; ns-546.awsdns-04.net points to 2600:9000:5302:2200::1 and 205.251.194.34; ns-1093.awsdns-08.org points to 2600:9000:5304:4500::1 and 205.251.196.69; ns-1953.awsdns-52.co.uk points to 2600:9000:5307:a100::1 and 205.251.199.161.

Three mail servers handle thegreatcourses.com: cluster2.us.messagelabs.com, cluster2a.us.messagelabs.com and thegreatcourses-com.mail.protection.outlook.com.

thegreatcourses.com shares at least partially some mail servers with other domains, for instance catfootwear.ru, sekisuiurethane.co.jp, orchardsoft.com, innovatewithdairy.net and ezinetmail.com.

Mail servers frequently appear alongside cust39341-1.in.mailcontrol.com, cust39341-2.in.mailcontrol.com, mxa-00204f01.gslb.pphosted.com and mxb-00204f01.gslb.pphosted.com.

Eight IP numbers for host names:

cluster2.us.messagelabs.com points to 67.219.246.210, 67.219.246.215, 67.219.247.106, 67.219.247.202, 67.219.247.204, 67.219.250.212, 67.219.250.215 and 67.219.250.218

thegreatcourses-com.mail.protection.outlook.com points to 2a01:111:f403:c803::, 2a01:111:f403:c902::4, 2a01:111:f403:c92c::3, 2a01:111:f403:c946::7, 52.101.8.44, 52.101.11.17, 52.101.41.26 and 52.101.42.6

One IP number:

cluster2a.us.messagelabs.com points to 34.75.172.113