harcourt-elearning.com - dns.ninja

`harcourt-elearning.com`

DNSSEC	⚠️ Not signed
NS	`ns-872.awsdns-45.net` ⭐
		A	2600:9000:5303:6800::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-872.awsdns-45.net`
		A	205.251.195.104^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-872.awsdns-45.net`
NS	`ns-1215.awsdns-23.org`
		A	2600:9000:5304:bf00::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1215.awsdns-23.org`
		A	205.251.196.191^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1215.awsdns-23.org`
NS	`ns-136.awsdns-17.com`
		A	2600:9000:5300:8800::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-136.awsdns-17.com`
		A	205.251.192.136^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-136.awsdns-17.com`
NS	`ns-1636.awsdns-12.co.uk`
		A	2600:9000:5306:6400::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1636.awsdns-12.co.uk`
		A	205.251.198.100^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1636.awsdns-12.co.uk`
SOA	`ns-872.awsdns-45.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=1786264549

Subdomains

chi-hmof-proxy-vip1-public.harcourt-elearning.com

ftp.harcourt-elearning.com

smtp1.harcourt-elearning.com

chi-hmof-proxy-vip2-public.harcourt-elearning.com

Same first word

harcourt-elearning.com

Similar names

harcourte-learning.com

DNS History

10 records (4 active, 6 former)

●NSns-1215.awsdns-23.org2026-02-17 → 2026-08-09 · 3 obs

○ 2017-05-17 16:15:08
● 2026-02-17 08:49:16
● 2026-08-09 08:55:32

●NSns-136.awsdns-17.com2026-02-17 → 2026-08-09 · 3 obs

○ 2017-05-17 16:15:08
● 2026-02-17 08:49:16
● 2026-08-09 08:55:32

●NSns-1636.awsdns-12.co.uk2026-02-17 → 2026-08-09 · 3 obs

○ 2017-05-17 16:15:08
● 2026-02-17 08:49:16
● 2026-08-09 08:55:32

●NSns-872.awsdns-45.net2026-02-17 → 2026-08-09 · 3 obs

○ 2017-05-17 16:15:08
● 2026-02-17 08:49:16
● 2026-08-09 08:55:32

○NSns1.hmco.com2015-08-21 → 2015-12-09 · 4 obs

● 2015-08-21 08:47:16
● 2015-12-09 06:17:24
○ 2016-03-09 07:05:42
○ 2026-08-09 08:55:32

○NSns5.hmco.com2015-08-21 → 2017-05-17 · 4 obs

● 2015-08-21 08:47:16
● 2017-05-17 16:15:08
○ 2026-02-17 08:49:16
○ 2026-08-09 08:55:32

○NSns6.hmco.com2015-08-21 → 2017-05-17 · 4 obs

● 2015-08-21 08:47:16
● 2017-05-17 16:15:08
○ 2026-02-17 08:49:16
○ 2026-08-09 08:55:32

○NSns7.hmco.com2015-08-21 → 2017-05-17 · 4 obs

● 2015-08-21 08:47:16
● 2017-05-17 16:15:08
○ 2026-02-17 08:49:16
○ 2026-08-09 08:55:32

○MXus-smtp-inbound-1.mimecast.com2015-08-21 → 2017-05-17 · 4 obs

● 2015-08-21 08:47:16
● 2017-05-17 16:15:08
○ 2026-02-17 08:49:16
○ 2026-08-09 08:55:32

○MXus-smtp-inbound-2.mimecast.com2015-08-21 → 2017-05-17 · 4 obs

● 2015-08-21 08:47:16
● 2017-05-17 16:15:08
○ 2026-02-17 08:49:16
○ 2026-08-09 08:55:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
harcourt-elearning.com	ns-136.awsdns-17.com, ns-872.awsdns-45.net, ns-1636.awsdns-12.co.uk, ns-1215.awsdns-23.org	2 records

✅ Authoritative Response

Server:205.251.192.136

NS records: ns-136.awsdns-17.com, ns-872.awsdns-45.net, ns-1636.awsdns-12.co.uk, ns-1215.awsdns-23.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for harcourt-elearning.com (unsigned zone)

⏱️ Timing

Total: 225ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	4	`ns-1215.awsdns-23.org, ns-136.awsdns-17.com...`
SOA	1	`ns-872.awsdns-45.net awsdns-hostmaster.a`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-136.awsdns-17.com, ns-136.awsdns-17.com)

Analysis

Hierarchy

harcourt-elearning.com serves as the parent of chi-hmof-proxy-vip1-public.harcourt-elearning.com, ftp.harcourt-elearning.com, smtp1.harcourt-elearning.com and chi-hmof-proxy-vip2-public.harcourt-elearning.com.

Name Servers

The NS records for harcourt-elearning.com point to four name servers: ns-136.awsdns-17.com, ns-872.awsdns-45.net, ns-1215.awsdns-23.org and ns-1636.awsdns-12.co.uk.

harcourt-elearning.com has at least partial name server overlap with other domains, such as selector-casino.network, socdoc.co.kr, executiva.adm.br and two others.

ns-136.awsdns-17.com, ns-872.awsdns-45.net, ns-1215.awsdns-23.org and ns-1636.awsdns-12.co.uk all point to exactly two IP numbers each: ns-136.awsdns-17.com → 205.251.192.136 and 2600:9000:5300:8800::1; ns-872.awsdns-45.net → 205.251.195.104 and 2600:9000:5303:6800::1; ns-1215.awsdns-23.org → 205.251.196.191 and 2600:9000:5304:bf00::1; ns-1636.awsdns-12.co.uk → 205.251.198.100 and 2600:9000:5306:6400::1.