course-source.com - dns.ninja

`course-source.com`

DNSSEC	⚠️ Not signed
A	162.159.136.54^{Cloudflare162.159.128.0/19 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
A	162.159.137.54^{Cloudflare162.159.128.0/19 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ns1.bdm.microsoftonline.com` ⭐
		A	2603:1061:0:700::d0^{🇺🇸 Microsoft2603:1000::/25 MICROSOFT}
			PTR	`ns1-208.azure-dns.com`
		A	13.107.236.208^{🇺🇸 Microsoft13.104.0.0/14 MICROSOFT}
			PTR	`ns1-208.azure-dns.com`
NS	`ns2.bdm.microsoftonline.com`
		A	2620:1ec:8ec:700::d0^{🇺🇸 Microsoft2620:1ec::/36 MICROSOFT}
			PTR	`ns2-208.azure-dns.net`
		A	150.171.21.208^{🇺🇸 Microsoft150.171.0.0/16 MICROSOFT}
NS	`ns3.bdm.microsoftonline.com`
		A	2a01:111:4000:700::d0^{🇬🇧 Microsoft2a01:111:4000::/36}
			PTR	`ns3-208.azure-dns.org`
		A	204.14.183.208^{🇺🇸 Microsoft204.14.180.0/22}
NS	`ns4.bdm.microsoftonline.com`
		A	2620:1ec:bda:700::d0^{🇺🇸 Microsoft2620:1ec::/36 MICROSOFT}
			PTR	`ns4-208.azure-dns.info`
		A	208.84.5.208^{🇺🇸 Microsoft208.84.0.0/21 MICROSOFT}
MX	`coursesource-com01e.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca0b::^{🇬🇧 Microsoft2a01:111:f000::/36}
			PTR	`mail-lo2p265cu02300.inbound.protection.outlook.com`
		A	2a01:111:f403:ca0b::2^{🇬🇧 Microsoft2a01:111:f000::/36}
			PTR	`mail-lo0p265cu00202.inbound.protection.outlook.com`
		A	2a01:111:f403:ca1a::^{🇬🇧 Microsoft2a01:111:f000::/36}
			PTR	`mail-cwxp265cu00500.inbound.protection.outlook.com`
		A	2a01:111:f403:ca1a::1^{🇬🇧 Microsoft2a01:111:f000::/36}
			PTR	`mail-cwxp265cu00601.inbound.protection.outlook.com`
		A	52.101.89.0^{🇬🇧 Microsoft52.96.0.0/12 MICROSOFT}
		A	52.101.89.1^{🇬🇧 Microsoft52.96.0.0/12 MICROSOFT}
		A	52.101.99.0^{🇬🇧 Microsoft52.96.0.0/12 MICROSOFT}
		A	52.101.99.2^{🇬🇧 Microsoft52.96.0.0/12 MICROSOFT}
TXT	`mscid=urVjbGuIQvj4jzfswENi17NRFpGj/AS/S5aLZkgvxbo7ll+GPSN+8d1rpWlnz8vYQVEvp2G...`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
TXT	`google-site-verification=VebIL8JXx0rK1sRTuSm8bW8CqV3KJlVq8-iJGNfLDHQ`
SOA	`ns1.bdm.microsoftonline.com`azuredns-hostmaster@microsoft.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=1782846061

Subdomains

www.course-source.com

Same first word

course-source.co.uk

course-source.com

course-source.net

DNS History

25 records (7 active, 18 former)

○NSns-uk.1and1-dns.biz2016-06-28 → 2017-02-13 · 5 obs

○ 2016-02-11 19:49:04
● 2016-06-28 18:37:32
● 2017-02-13 04:17:14
○ 2019-01-21 19:54:04
○ 2026-06-30 19:30:50

○NSns-uk.1and1-dns.co.uk2016-06-28 → 2017-02-13 · 5 obs

○ 2016-02-11 19:49:04
● 2016-06-28 18:37:32
● 2017-02-13 04:17:14
○ 2019-01-21 19:54:04
○ 2026-06-30 19:30:50

○NSns-uk.1and1-dns.com2016-06-28 → 2017-02-13 · 5 obs

○ 2016-02-11 19:49:04
● 2016-06-28 18:37:32
● 2017-02-13 04:17:14
○ 2019-01-21 19:54:04
○ 2026-06-30 19:30:50

○NSns-uk.1and1-dns.org2016-06-28 → 2017-02-13 · 5 obs

○ 2016-02-11 19:49:04
● 2016-06-28 18:37:32
● 2017-02-13 04:17:14
○ 2019-01-21 19:54:04
○ 2026-06-30 19:30:50

●NSns1.bdm.microsoftonline.com2026-03-03 → 2026-06-30 · 3 obs

○ 2019-01-21 19:54:04
● 2026-03-03 13:38:50
● 2026-06-30 19:30:50

○NSns1.domainmonster.com2015-07-17 → 2019-01-21 · 7 obs

● 2015-07-17 10:32:14
● 2016-02-11 19:49:04
○ 2016-06-28 18:37:32
○ 2017-02-13 04:17:14
● 2019-01-21 19:54:04
○ 2026-03-03 13:38:50
○ 2026-06-30 19:30:50

●NSns2.bdm.microsoftonline.com2026-03-03 → 2026-06-30 · 3 obs

○ 2019-01-21 19:54:04
● 2026-03-03 13:38:50
● 2026-06-30 19:30:50

○NSns2.domainmonster.com2015-07-17 → 2019-01-21 · 7 obs

● 2015-07-17 10:32:14
● 2016-02-11 19:49:04
○ 2016-06-28 18:37:32
○ 2017-02-13 04:17:14
● 2019-01-21 19:54:04
○ 2026-03-03 13:38:50
○ 2026-06-30 19:30:50

●NSns3.bdm.microsoftonline.com2026-03-03 → 2026-06-30 · 3 obs

○ 2019-01-21 19:54:04
● 2026-03-03 13:38:50
● 2026-06-30 19:30:50

○NSns3.domainmonster.com2015-07-17 → 2019-01-21 · 7 obs

● 2015-07-17 10:32:14
● 2016-02-11 19:49:04
○ 2016-06-28 18:37:32
○ 2017-02-13 04:17:14
● 2019-01-21 19:54:04
○ 2026-03-03 13:38:50
○ 2026-06-30 19:30:50

●NSns4.bdm.microsoftonline.com2026-03-03 → 2026-06-30 · 3 obs

○ 2019-01-21 19:54:04
● 2026-03-03 13:38:50
● 2026-06-30 19:30:50

●MXcoursesource-com01e.mail.protection.outlook.com2026-03-03 → 2026-06-30 · 3 obs

○ 2019-01-21 19:54:04
● 2026-03-03 13:38:50
● 2026-06-30 19:30:50

○MXmx.course-source.com.a.emailconfig.com2015-07-17 → 2016-02-11 · 4 obs

● 2015-07-17 10:32:14
● 2016-02-11 19:49:04
○ 2016-06-28 18:37:32
○ 2026-06-30 19:30:50

○MXmx.emailconfig.com2019-01-21 → 2019-01-21 · 4 obs

○ 2017-02-13 04:17:14
● 2019-01-21 19:54:04
○ 2026-03-03 13:38:50
○ 2026-06-30 19:30:50

○MXmx00.1and1.co.uk2016-06-28 → 2016-06-28 · 4 obs

○ 2016-02-11 19:49:04
● 2016-06-28 18:37:32
○ 2017-02-13 04:17:14
○ 2026-06-30 19:30:50

○MXmx01.1and1.co.uk2016-06-28 → 2016-06-28 · 4 obs

○ 2016-02-11 19:49:04
● 2016-06-28 18:37:32
○ 2017-02-13 04:17:14
○ 2026-06-30 19:30:50

○MXmx10.myspamonline.com2017-02-13 → 2017-02-13 · 4 obs

○ 2016-06-28 18:37:32
● 2017-02-13 04:17:14
○ 2019-01-21 19:54:04
○ 2026-06-30 19:30:50

○A104.238.185.842019-01-21 → 2019-01-21 · 4 obs

○ 2017-02-13 04:17:14
● 2019-01-21 19:54:04
○ 2026-03-03 13:38:50
○ 2026-06-30 19:30:50

○A109.68.33.182015-07-17 → 2016-02-11 · 4 obs

● 2015-07-17 10:32:14
● 2016-02-11 19:49:04
○ 2016-06-28 18:37:32
○ 2026-06-30 19:30:50

●A162.159.136.542026-03-03 → 2026-06-30 · 3 obs

○ 2019-01-21 19:54:04
● 2026-03-03 13:38:50
● 2026-06-30 19:30:50

●A162.159.137.542026-03-03 → 2026-06-30 · 3 obs

○ 2019-01-21 19:54:04
● 2026-03-03 13:38:50
● 2026-06-30 19:30:50

○A2001:8d8:1000:5084:c433:2d4e:8d80:183c2016-06-28 → 2016-06-28 · 4 obs

○ 2016-02-11 19:49:04
● 2016-06-28 18:37:32
○ 2017-02-13 04:17:14
○ 2026-06-30 19:30:50

○A2001:8d8:100f:f000::2ea2017-02-13 → 2017-02-13 · 4 obs

○ 2016-06-28 18:37:32
● 2017-02-13 04:17:14
○ 2019-01-21 19:54:04
○ 2026-06-30 19:30:50

○A217.160.0.792017-02-13 → 2017-02-13 · 4 obs

○ 2016-06-28 18:37:32
● 2017-02-13 04:17:14
○ 2019-01-21 19:54:04
○ 2026-06-30 19:30:50

○A217.160.146.1962016-06-28 → 2016-06-28 · 4 obs

○ 2016-02-11 19:49:04
● 2016-06-28 18:37:32
○ 2017-02-13 04:17:14
○ 2026-06-30 19:30:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	b.gtld-servers.net, a.gtld-servers.net, e.gtld-servers.net, l.gtld-servers.net...	-
course-source.com	ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com, ns4.bdm.microsoftonline.com	8 records

✅ Authoritative Response

Server:208.84.5.208

NS records: ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com, ns4.bdm.microsoftonline.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for course-source.com (unsigned zone)

⏱️ Timing

Total: 572ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`162.159.136.54, 162.159.137.54`
NS	4	`ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com...`
MX	1	`coursesource-com01e.mail.protection.outl`
TXT	3	`mscid=urVjbGuIQvj4jzfswENi17NRFpGj/AS/S5, v=spf1 include:spf.protection.outlook.co...`
SOA	1	`ns1.bdm.microsoftonline.com azuredns-hos`

📌 Glue Records Collected

Total: 8

Out-of-bailiwick: 8 (ns1.bdm.microsoftonline.com, ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com...)

Analysis

Hierarchy

course-source.com serves as the parent of www.course-source.com.

IP Addresses

course-source.com resolves to the IP addresses 162.159.136.54 and 162.159.137.54

Among the host names that share IP numbers with course-source.com are techkashif.com, track42.eu, clearbank.co.uk and two others.

Name Servers

The domain course-source.com is delegated to these four name servers: ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com and ns4.bdm.microsoftonline.com.

course-source.com has at least partial name server overlap with other domains, such as collegeblondin.qc.ca, brasport.com.br, mhgarelick.com and two others.

ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com and ns4.bdm.microsoftonline.com all point to exactly two IP numbers each: ns1.bdm.microsoftonline.com → 13.107.236.208 and 2603:1061:0:700::d0; ns2.bdm.microsoftonline.com → 150.171.21.208 and 2620:1ec:8ec:700::d0; ns3.bdm.microsoftonline.com → 204.14.183.208 and 2a01:111:4000:700::d0; ns4.bdm.microsoftonline.com → 208.84.5.208 and 2620:1ec:bda:700::d0.

Mail Servers

course-source.com routes its mail through a single mail server, coursesource-com01e.mail.protection.outlook.com.

coursesource-com01e.mail.protection.outlook.com directs to 8 IP numbers, including 52.101.89.0, 52.101.89.1 and 52.101.99.0, along with 5 other.