🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`algorithm-challenge.com`

DNSSEC	⚠️ Not signed
A	199.36.158.100^{🇺🇸 Fastly199.36.158.0/24 Google}
NS	`ns-766.awsdns-31.net` ⭐
		A	2600:9000:5302:fe00::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-766.awsdns-31.net`
		A	205.251.194.254^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-766.awsdns-31.net`
NS	`ns-1243.awsdns-27.org`
		A	2600:9000:5304:db00::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1243.awsdns-27.org`
		A	205.251.196.219^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1243.awsdns-27.org`
NS	`ns-1949.awsdns-51.co.uk`
		A	2600:9000:5307:9d00::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-1949.awsdns-51.co.uk`
		A	205.251.199.157^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-1949.awsdns-51.co.uk`
NS	`ns-493.awsdns-61.com`
		A	2600:9000:5301:ed00::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-493.awsdns-61.com`
		A	205.251.193.237^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-493.awsdns-61.com`
TXT	`hosting-site=algo-challenge-4`
SOA	`ns-766.awsdns-31.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=1788339245

Same first word

algorithm-challenge.com

Previous names

Next names

DNS History

5 records (5 active, 0 former)

●NSns-1243.awsdns-27.org2026-08-26 → 2026-09-02 · 2 obs

● 2026-08-26 17:38:14
● 2026-09-02 08:57:00

●NSns-1949.awsdns-51.co.uk2026-08-26 → 2026-09-02 · 2 obs

● 2026-08-26 17:38:14
● 2026-09-02 08:57:00

●NSns-493.awsdns-61.com2026-08-26 → 2026-09-02 · 2 obs

● 2026-08-26 17:38:14
● 2026-09-02 08:57:00

●NSns-766.awsdns-31.net2026-08-26 → 2026-09-02 · 2 obs

● 2026-08-26 17:38:14
● 2026-09-02 08:57:00

●A199.36.158.1002026-08-26 → 2026-09-02 · 2 obs

● 2026-08-26 17:38:14
● 2026-09-02 08:57:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	b.gtld-servers.net, g.gtld-servers.net, h.gtld-servers.net, a.gtld-servers.net...	-
algorithm-challenge.com	ns-766.awsdns-31.net, ns-493.awsdns-61.com, ns-1243.awsdns-27.org, ns-1949.awsdns-51.co.uk	2 records

✅ Authoritative Response

Server:205.251.194.254

NS records: ns-766.awsdns-31.net, ns-493.awsdns-61.com, ns-1243.awsdns-27.org, ns-1949.awsdns-51.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 642ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`199.36.158.100`
NS	4	`ns-1243.awsdns-27.org, ns-1949.awsdns-51.co.uk...`
TXT	1	`hosting-site=algo-challenge-4`
SOA	1	`ns-766.awsdns-31.net awsdns-hostmaster.a`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-493.awsdns-61.com, ns-493.awsdns-61.com)

Analysis

IP Addresses

algorithm-challenge.com resolves to one IP address: 199.36.158.100.

tapntrak.net, athbase.com, clayboymagazine.com and two other host names share IP numbers with algorithm-challenge.com.

Name Servers

The authoritative name servers for algorithm-challenge.com are ns-493.awsdns-61.com, ns-766.awsdns-31.net, ns-1243.awsdns-27.org and ns-1949.awsdns-51.co.uk.

algorithm-challenge.com has at least partial name server overlap with other domains, such as 199.211.34.in-addr.arpa, aknir.jp, 183.226.44.in-addr.arpa and two others.

It is common to find these name servers paired with the name servers ns1-24-us-west-2.ec2-rdns.amazonaws.com, ns2-24-us-west-2.ec2-rdns.amazonaws.com, ns3-24-us-west-2.ec2-rdns.amazonaws.com and ns4-24-us-west-2.ec2-rdns.amazonaws.com.

ns-493.awsdns-61.com, ns-766.awsdns-31.net, ns-1243.awsdns-27.org and ns-1949.awsdns-51.co.uk all point to exactly two IP numbers each: ns-493.awsdns-61.com → 205.251.193.237 and 2600:9000:5301:ed00::1; ns-766.awsdns-31.net → 205.251.194.254 and 2600:9000:5302:fe00::1; ns-1243.awsdns-27.org → 205.251.196.219 and 2600:9000:5304:db00::1; ns-1949.awsdns-51.co.uk → 205.251.199.157 and 2600:9000:5307:9d00::1.

algorithm-challenge.com - robtex.com