100daysoflearning.com - dns.ninja

`100daysoflearning.com`

DNSSEC	⚠️ Not signed
A	20.85.72.68^{🇺🇸 Microsoft20.64.0.0/10}
NS	`ns-390.awsdns-48.com` ⭐
		A	2600:9000:5301:8600::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-390.awsdns-48.com`
		A	205.251.193.134^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-390.awsdns-48.com`
NS	`ns-1185.awsdns-20.org`
		A	2600:9000:5304:a100::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1185.awsdns-20.org`
		A	205.251.196.161^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1185.awsdns-20.org`
NS	`ns-1842.awsdns-38.co.uk`
		A	2600:9000:5307:3200::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-1842.awsdns-38.co.uk`
		A	205.251.199.50^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-1842.awsdns-38.co.uk`
NS	`ns-820.awsdns-38.net`
		A	2600:9000:5303:3400::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-820.awsdns-38.net`
		A	205.251.195.52^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-820.awsdns-38.net`
TXT	`v=spf1 -all`
SOA	`ns-390.awsdns-48.com`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=1785516147

Same first word

100daysoflearning.com

DNS History

12 records (5 active, 7 former)

○NSdnsmaster01.blackboard.com2015-08-11 → 2019-02-21 · 4 obs

● 2015-08-11 11:58:50
● 2019-02-21 08:07:56
○ 2026-03-07 17:54:32
○ 2026-07-31 16:58:34

●NSns-1185.awsdns-20.org2026-03-07 → 2026-07-31 · 3 obs

○ 2019-02-21 08:07:56
● 2026-03-07 17:54:32
● 2026-07-31 16:58:34

●NSns-1842.awsdns-38.co.uk2026-03-07 → 2026-07-31 · 3 obs

○ 2019-02-21 08:07:56
● 2026-03-07 17:54:32
● 2026-07-31 16:58:34

●NSns-390.awsdns-48.com2026-03-07 → 2026-07-31 · 3 obs

○ 2019-02-21 08:07:56
● 2026-03-07 17:54:32
● 2026-07-31 16:58:34

●NSns-820.awsdns-38.net2026-03-07 → 2026-07-31 · 3 obs

○ 2019-02-21 08:07:56
● 2026-03-07 17:54:32
● 2026-07-31 16:58:34

○NSns1.blackboard.com2015-08-11 → 2019-02-21 · 4 obs

● 2015-08-11 11:58:50
● 2019-02-21 08:07:56
○ 2026-03-07 17:54:32
○ 2026-07-31 16:58:34

○NSns2.blackboard.com2015-08-11 → 2019-02-21 · 4 obs

● 2015-08-11 11:58:50
● 2019-02-21 08:07:56
○ 2026-03-07 17:54:32
○ 2026-07-31 16:58:34

○NSns3.blackboard.com2015-08-11 → 2019-02-21 · 4 obs

● 2015-08-11 11:58:50
● 2019-02-21 08:07:56
○ 2026-03-07 17:54:32
○ 2026-07-31 16:58:34

○NSns4.blackboard.com2015-08-11 → 2019-02-21 · 4 obs

● 2015-08-11 11:58:50
● 2019-02-21 08:07:56
○ 2026-03-07 17:54:32
○ 2026-07-31 16:58:34

●A20.85.72.682026-03-07 → 2026-07-31 · 3 obs

○ 2019-02-21 08:07:56
● 2026-03-07 17:54:32
● 2026-07-31 16:58:34

○A45.33.124.1802015-08-11 → 2016-03-02 · 4 obs

● 2015-08-11 11:58:50
● 2016-03-02 05:33:22
○ 2016-06-19 19:57:56
○ 2026-07-31 16:58:34

○A69.196.244.992016-06-19 → 2019-02-21 · 5 obs

○ 2016-03-02 05:33:22
● 2016-06-19 19:57:56
● 2019-02-21 08:07:56
○ 2026-03-07 17:54:32
○ 2026-07-31 16:58:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	m.gtld-servers.net, j.gtld-servers.net, g.gtld-servers.net, f.gtld-servers.net...	-
100daysoflearning.com	ns-390.awsdns-48.com, ns-820.awsdns-38.net, ns-1185.awsdns-20.org, ns-1842.awsdns-38.co.uk	2 records

✅ Authoritative Response

Server:205.251.199.50

NS records: ns-390.awsdns-48.com, ns-820.awsdns-38.net, ns-1185.awsdns-20.org, ns-1842.awsdns-38.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 100daysoflearning.com (unsigned zone)

⏱️ Timing

Total: 498ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`20.85.72.68`
NS	4	`ns-1185.awsdns-20.org, ns-1842.awsdns-38.co.uk...`
TXT	1	`v=spf1 -all`
SOA	1	`ns-390.awsdns-48.com awsdns-hostmaster.a`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-390.awsdns-48.com, ns-390.awsdns-48.com)

Analysis

IP Addresses

100daysoflearning.com points to a single IP number: 20.85.72.68.

Additional host names — my.blackboard.com, preview-learn.blackboard.com, ondemand.blackboard.com and two others — share IP numbers with 100daysoflearning.com.

Name Servers

100daysoflearning.com has four authoritative name servers: ns-390.awsdns-48.com, ns-820.awsdns-38.net, ns-1185.awsdns-20.org and ns-1842.awsdns-38.co.uk.

The name servers of 100daysoflearning.com overlap at least partially with those of other domains — among them foodstamps-assistance.com, ustitle.solutions, gallantoficial.com.br and two more.

Each of the four hosts ns-390.awsdns-48.com, ns-820.awsdns-38.net, ns-1185.awsdns-20.org and ns-1842.awsdns-38.co.uk has two IP addresses. ns-390.awsdns-48.com points to 205.251.193.134 and 2600:9000:5301:8600::1. ns-820.awsdns-38.net points to 205.251.195.52 and 2600:9000:5303:3400::1. ns-1185.awsdns-20.org points to 205.251.196.161 and 2600:9000:5304:a100::1. ns-1842.awsdns-38.co.uk points to 205.251.199.50 and 2600:9000:5307:3200::1.