hdcourse.com - dns.ninja

`hdcourse.com`

DNSSEC	⚠️ Not signed
A	162.159.135.42^{Cloudflare162.159.128.0/19 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ns-993.awsdns-60.net` ⭐
		A	2600:9000:5303:e100::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-993.awsdns-60.net`
		A	205.251.195.225^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-993.awsdns-60.net`
NS	`ns-1327.awsdns-37.org`
		A	2600:9000:5305:2f00::1^{🇺🇸 Amazon2600:9000:5305::/48 - CloudFront}
			PTR	`ns-1327.awsdns-37.org`
		A	205.251.197.47^{🇺🇸 Amazon205.251.197.0/24 prefix}
NS	`ns-1835.awsdns-37.co.uk`
		A	2600:9000:5307:2b00::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-1835.awsdns-37.co.uk`
		A	205.251.199.43^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-1835.awsdns-37.co.uk`
NS	`ns-68.awsdns-08.com`
		A	2600:9000:5300:4400::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-68.awsdns-08.com`
		A	205.251.192.68^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-68.awsdns-08.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c06::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bg-in-f26.1e100.net`
		A	173.194.45.27^{🇺🇸 Google173.194.0.0/16}
			PTR	`yuiadum-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1a^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.26^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f27.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1b^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f27.1e100.net`
		A	192.178.223.26^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f26.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:400c:c23::1b^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`yubrupd-in-f27.1e100.net`
		A	172.253.157.26^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f26.1e100.net`
TXT	`openai-domain-verification=dv-CU3PO2EPnafeN5eD5UgYq8yo`
TXT	`v=spf1 a mx include:_spf.mlsend.com ?all`
SOA	`ns-993.awsdns-60.net`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=1782552930

Subdomains

www.hdcourse.com

Same first word

hdcourse.com

Similar names

DNS History

15 records (10 active, 5 former)

○NSf1g1ns1.dnspod.net2015-07-20 → 2017-03-22 · 4 obs

● 2015-07-20 10:02:50
● 2017-03-22 10:20:54
○ 2020-03-03 08:50:02
○ 2026-06-27 10:00:18

○NSf1g1ns2.dnspod.net2015-07-20 → 2016-07-16 · 4 obs

● 2015-07-20 10:02:50
● 2016-07-16 23:23:26
○ 2020-03-03 08:50:02
○ 2026-06-27 10:00:18

●NSns-1327.awsdns-37.org2020-03-03 → 2026-06-27 · 3 obs

○ 2017-03-22 10:20:54
● 2020-03-03 08:50:02
● 2026-06-27 10:00:18

●NSns-1835.awsdns-37.co.uk2020-03-03 → 2026-06-27 · 3 obs

○ 2017-03-22 10:20:54
● 2020-03-03 08:50:02
● 2026-06-27 10:00:18

●NSns-68.awsdns-08.com2020-03-03 → 2026-06-27 · 3 obs

○ 2017-03-22 10:20:54
● 2020-03-03 08:50:02
● 2026-06-27 10:00:18

●NSns-993.awsdns-60.net2020-03-03 → 2026-06-27 · 3 obs

○ 2017-03-22 10:20:54
● 2020-03-03 08:50:02
● 2026-06-27 10:00:18

●MXalt1.aspmx.l.google.com2020-03-03 → 2026-06-27 · 3 obs

○ 2017-03-22 10:20:54
● 2020-03-03 08:50:02
● 2026-06-27 10:00:18

●MXalt2.aspmx.l.google.com2020-03-03 → 2026-06-27 · 3 obs

○ 2017-03-22 10:20:54
● 2020-03-03 08:50:02
● 2026-06-27 10:00:18

●MXalt3.aspmx.l.google.com2020-03-03 → 2026-06-27 · 3 obs

○ 2017-03-22 10:20:54
● 2020-03-03 08:50:02
● 2026-06-27 10:00:18

●MXalt4.aspmx.l.google.com2020-03-03 → 2026-06-27 · 3 obs

○ 2017-03-22 10:20:54
● 2020-03-03 08:50:02
● 2026-06-27 10:00:18

●MXaspmx.l.google.com2020-03-03 → 2026-06-27 · 3 obs

○ 2017-03-22 10:20:54
● 2020-03-03 08:50:02
● 2026-06-27 10:00:18

○MXmxbiz1.qq.com2015-07-20 → 2017-03-22 · 4 obs

● 2015-07-20 10:02:50
● 2017-03-22 10:20:54
○ 2020-03-03 08:50:02
○ 2026-06-27 10:00:18

○MXmxbiz2.qq.com2015-07-20 → 2017-03-22 · 4 obs

● 2015-07-20 10:02:50
● 2017-03-22 10:20:54
○ 2020-03-03 08:50:02
○ 2026-06-27 10:00:18

●A162.159.135.422026-03-11 → 2026-06-27 · 3 obs

○ 2020-03-03 08:50:02
● 2026-03-11 21:57:12
● 2026-06-27 10:00:18

○A35.241.115.1572020-03-03 → 2020-03-03 · 3 obs

● 2020-03-03 08:50:02
○ 2026-03-11 21:57:12
○ 2026-06-27 10:00:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	g.gtld-servers.net, h.gtld-servers.net, b.gtld-servers.net, d.gtld-servers.net...	-
hdcourse.com	ns-68.awsdns-08.com, ns-993.awsdns-60.net, ns-1835.awsdns-37.co.uk, ns-1327.awsdns-37.org	2 records

✅ Authoritative Response

Server:205.251.192.68

NS records: ns-68.awsdns-08.com, ns-993.awsdns-60.net, ns-1835.awsdns-37.co.uk, ns-1327.awsdns-37.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for hdcourse.com (unsigned zone)

⏱️ Timing

Total: 741ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`162.159.135.42`
NS	4	`ns-1327.awsdns-37.org, ns-1835.awsdns-37.co.uk...`
MX	5	`aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...`
TXT	2	`openai-domain-verification=dv-CU3PO2EPna, v=spf1 a mx include:_spf.mlsend.com ?all`
SOA	1	`ns-993.awsdns-60.net awsdns-hostmaster.a`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-68.awsdns-08.com, ns-68.awsdns-08.com)

Analysis

Hierarchy

www.hdcourse.com is delegated beneath hdcourse.com.

IP Addresses

hdcourse.com points to a single IP number: 162.159.135.42.

Additional host names — madmex.com.au, sportbeach.fr, georgegaldorisi.com and two others — share IP numbers with hdcourse.com.

Name Servers

hdcourse.com has four authoritative name servers: ns-68.awsdns-08.com, ns-993.awsdns-60.net, ns-1327.awsdns-37.org and ns-1835.awsdns-37.co.uk.

There is at least partial name server overlap between hdcourse.com and other domains — suzuki-motor.net, surfconnect.com.br, prod.collab.apps.one.audi and two more among them.

All four hostnames — ns-68.awsdns-08.com, ns-993.awsdns-60.net, ns-1327.awsdns-37.org and ns-1835.awsdns-37.co.uk — resolve to two IP numbers apiece: ns-68.awsdns-08.com to 205.251.192.68 and 2600:9000:5300:4400::1; ns-993.awsdns-60.net to 205.251.195.225 and 2600:9000:5303:e100::1; ns-1327.awsdns-37.org to 205.251.197.47 and 2600:9000:5305:2f00::1; ns-1835.awsdns-37.co.uk to 205.251.199.43 and 2600:9000:5307:2b00::1.

Mail Servers

Five mail servers handle hdcourse.com: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

hdcourse.com shares mail servers — at least in part — with other domains, including ns500693.ns500693.ns500734.ns500693.ns500699.ns500693.ns500588.ns500693.ns500699.ns500588.ns500699.ns500683.ns500693.ns500683.ns500588.dtrkdll.com, ns500768.ns500759.ns500698.ns500759.ns500758.ns500736.ns500698.ns500736.ns500735.ns500698.ns500708.ns500708.ns500698.ns500619.trackreceptor.com, ns500759.ns500759.ns500698.ns500758.ns500735.ns500698.ns500735.ns500698.ns500698.ns500698.ns500708.ns500708.ns500619.ns500619.ns500652.ns500619.trackreceptor.com and two others.

These mail servers are frequently used alongside mail servers alt4.aspmx.l.google.com, alt3.aspmx.l.google.com, aspmx2.googlemail.com and 3 other.

Host names with two IP numbers:

aspmx.l.google.com directs traffic to 173.194.45.27 and 2607:f8b0:4004:c06::1a.

alt1.aspmx.l.google.com directs traffic to 108.177.123.26 and 2800:3f0:4003:c0f::1a.

alt2.aspmx.l.google.com directs traffic to 172.253.116.27 and 2a00:1450:400b:c02::1b.

alt3.aspmx.l.google.com directs traffic to 192.178.223.26 and 2a00:1450:4009:c0f::1b.

alt4.aspmx.l.google.com directs traffic to 172.253.157.26 and 2a00:1450:400c:c23::1b.