🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`algorithm-class.com`

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-1181.awsdns-19.org` ⭐
		A	2600:9000:5304:9d00::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1181.awsdns-19.org`
		A	205.251.196.157^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1181.awsdns-19.org`
NS	`ns-1608.awsdns-09.co.uk`
		A	2600:9000:5306:4800::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1608.awsdns-09.co.uk`
		A	205.251.198.72^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1608.awsdns-09.co.uk`
NS	`ns-430.awsdns-53.com`
		A	2600:9000:5301:ae00::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-430.awsdns-53.com`
		A	205.251.193.174^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-430.awsdns-53.com`
NS	`ns-552.awsdns-05.net`
		A	2600:9000:5302:2800::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-552.awsdns-05.net`
		A	205.251.194.40^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-552.awsdns-05.net`
TXT	`v=spf1 -all`
SOA	`ns-1181.awsdns-19.org`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=1788322100

Subdomains

www.algorithm-class.com

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-1181.awsdns-19.org2026-08-18 → 2026-09-02 · 3 obs

○ 2017-04-05 03:02:42
● 2026-08-18 00:43:28
● 2026-09-02 04:31:38

●NSns-1608.awsdns-09.co.uk2026-08-18 → 2026-09-02 · 3 obs

○ 2017-04-05 03:02:42
● 2026-08-18 00:43:28
● 2026-09-02 04:31:38

●NSns-430.awsdns-53.com2026-08-18 → 2026-09-02 · 3 obs

○ 2017-04-05 03:02:42
● 2026-08-18 00:43:28
● 2026-09-02 04:31:38

●NSns-552.awsdns-05.net2026-08-18 → 2026-09-02 · 3 obs

○ 2017-04-05 03:02:42
● 2026-08-18 00:43:28
● 2026-09-02 04:31:38

○NSns73.domaincontrol.com2015-08-08 → 2017-04-05 · 4 obs

● 2015-08-08 14:07:08
● 2017-04-05 03:02:42
○ 2026-08-18 00:43:28
○ 2026-09-02 04:31:38

○NSns74.domaincontrol.com2015-08-08 → 2017-04-05 · 4 obs

● 2015-08-08 14:07:08
● 2017-04-05 03:02:42
○ 2026-08-18 00:43:28
○ 2026-09-02 04:31:38

●A23.23.181.852015-08-08 → 2026-09-02 · 2 obs

● 2015-08-08 14:07:08
● 2026-09-02 04:31:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
algorithm-class.com	ns-552.awsdns-05.net, ns-430.awsdns-53.com, ns-1608.awsdns-09.co.uk, ns-1181.awsdns-19.org	2 records

✅ Authoritative Response

Server:205.251.198.72

NS records: ns-552.awsdns-05.net, ns-430.awsdns-53.com, ns-1608.awsdns-09.co.uk, ns-1181.awsdns-19.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 352ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`23.23.181.85`
NS	4	`ns-1181.awsdns-19.org, ns-1608.awsdns-09.co.uk...`
TXT	1	`v=spf1 -all`
SOA	1	`ns-1181.awsdns-19.org awsdns-hostmaster.`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-430.awsdns-53.com, ns-430.awsdns-53.com)

Analysis

Hierarchy

algorithm-class.com is a parent domain of www.algorithm-class.com.

IP Addresses

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

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

Name Servers

The NS records for algorithm-class.com point to four name servers: ns-430.awsdns-53.com, ns-552.awsdns-05.net, ns-1181.awsdns-19.org and ns-1608.awsdns-09.co.uk.

algorithm-class.com shares at least some of its name servers with other domains, including miner-ipt.com, 577pg.com, madgoal.de and two others.

The host names ns-430.awsdns-53.com, ns-552.awsdns-05.net, ns-1181.awsdns-19.org and ns-1608.awsdns-09.co.uk each resolve to two IP addresses: ns-430.awsdns-53.com resolves to 205.251.193.174 and 2600:9000:5301:ae00::1; ns-552.awsdns-05.net resolves to 205.251.194.40 and 2600:9000:5302:2800::1; ns-1181.awsdns-19.org resolves to 205.251.196.157 and 2600:9000:5304:9d00::1; ns-1608.awsdns-09.co.uk resolves to 205.251.198.72 and 2600:9000:5306:4800::1.

algorithm-class.com - robtex.com