🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`algorithm-class.org`

DNSSEC	⚠️ Not signed
A	23.23.181.85^{🇺🇸 Amazon23.22.0.0/15 EC2 IAD prefix}
		PTR	`ec2-23-23-181-85.compute-1.amazonaws.com`
NS	`ns-90.awsdns-11.com` ⭐
		A	2600:9000:5300:5a00::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-90.awsdns-11.com`
		A	205.251.192.90^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-90.awsdns-11.com`
NS	`ns-1423.awsdns-49.org`
		A	2600:9000:5305:8f00::1^{🇺🇸 Amazon2600:9000:5305::/48 - CloudFront}
			PTR	`ns-1423.awsdns-49.org`
		A	205.251.197.143^{🇺🇸 Amazon205.251.197.0/24 prefix}
			PTR	`ns-1423.awsdns-49.org`
NS	`ns-2023.awsdns-60.co.uk`
		A	2600:9000:5307:e700::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-2023.awsdns-60.co.uk`
		A	205.251.199.231^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-2023.awsdns-60.co.uk`
NS	`ns-555.awsdns-05.net`
		A	2600:9000:5302:2b00::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-555.awsdns-05.net`
		A	205.251.194.43^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-555.awsdns-05.net`
TXT	`v=spf1 -all`
SOA	`ns-90.awsdns-11.com`awsdns-hostmaster@amazon.com serial=1

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1788332836

Same first word

algorithm-class.com

algorithm-class.org

Similar names

acls-algorithms.com

Previous names

Next names

DNS History

7 records (5 active, 2 former)

●NSns-1423.awsdns-49.org2026-08-27 → 2026-09-02 · 3 obs

○ 2017-04-07 00:40:06
● 2026-08-27 17:58:12
● 2026-09-02 07:24:52

●NSns-2023.awsdns-60.co.uk2026-08-27 → 2026-09-02 · 3 obs

○ 2017-04-07 00:40:06
● 2026-08-27 17:58:12
● 2026-09-02 07:24:52

●NSns-555.awsdns-05.net2026-08-27 → 2026-09-02 · 3 obs

○ 2017-04-07 00:40:06
● 2026-08-27 17:58:12
● 2026-09-02 07:24:52

●NSns-90.awsdns-11.com2026-08-27 → 2026-09-02 · 3 obs

○ 2017-04-07 00:40:06
● 2026-08-27 17:58:12
● 2026-09-02 07:24:52

○NSns73.domaincontrol.com2015-07-04 → 2017-04-07 · 4 obs

● 2015-07-04 02:52:28
● 2017-04-07 00:40:06
○ 2026-08-27 17:58:12
○ 2026-09-02 07:24:52

○NSns74.domaincontrol.com2015-07-04 → 2017-04-07 · 4 obs

● 2015-07-04 02:52:28
● 2017-04-07 00:40:06
○ 2026-08-27 17:58:12
○ 2026-09-02 07:24:52

●A23.23.181.852015-07-04 → 2026-09-02 · 2 obs

● 2015-07-04 02:52:28
● 2026-09-02 07:24:52

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org	-
algorithm-class.org	ns-555.awsdns-05.net, ns-1423.awsdns-49.org, ns-2023.awsdns-60.co.uk, ns-90.awsdns-11.com	2 records

✅ Authoritative Response

Server:205.251.192.90

NS records: ns-555.awsdns-05.net, ns-1423.awsdns-49.org, ns-2023.awsdns-60.co.uk, ns-90.awsdns-11.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for algorithm-class.org (unsigned zone)

⏱️ Timing

Total: 502ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`23.23.181.85`
NS	4	`ns-1423.awsdns-49.org, ns-2023.awsdns-60.co.uk...`
TXT	1	`v=spf1 -all`
SOA	1	`ns-90.awsdns-11.com awsdns-hostmaster.am`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-1423.awsdns-49.org, ns-1423.awsdns-49.org)

Analysis

IP Addresses

algorithm-class.org resolves to just one IP address, 23.23.181.85.

Two other host names, along with anatomy-class.org, artificialintelligence-class.com and coursera.email, also share IP numbers with algorithm-class.org.

Name Servers

The NS records for algorithm-class.org point to four name servers: ns-90.awsdns-11.com, ns-555.awsdns-05.net, ns-1423.awsdns-49.org and ns-2023.awsdns-60.co.uk.

algorithm-class.org has at least partial name server overlap with other domains, such as matsusakawel.com, d3vmxkbcuiv0u1.cloudfront.net, d51kvxznt2q0d.cloudfront.net and two others.

ns-90.awsdns-11.com, ns-555.awsdns-05.net, ns-1423.awsdns-49.org and ns-2023.awsdns-60.co.uk all point to exactly two IP numbers each: ns-90.awsdns-11.com → 205.251.192.90 and 2600:9000:5300:5a00::1; ns-555.awsdns-05.net → 205.251.194.43 and 2600:9000:5302:2b00::1; ns-1423.awsdns-49.org → 205.251.197.143 and 2600:9000:5305:8f00::1; ns-2023.awsdns-60.co.uk → 205.251.199.231 and 2600:9000:5307:e700::1.

algorithm-class.org - robtex.com