interviewprep.app - dns.ninja

`interviewprep.app`

DNSSEC	⚠️ Not signed
A	50.16.197.87^{🇺🇸 Amazon50.16.0.0/16 EC2 IAD prefix}
		PTR	`ec2-50-16-197-87.compute-1.amazonaws.com`
A	54.174.68.80^{🇺🇸 Amazon54.174.0.0/15 EC2 IAD prefix}
A	100.59.135.161^{🇺🇸 Amazon100.48.0.0/12 EC2 IAD prefix}
NS	`ns-351.awsdns-43.com` ⭐
		A	2600:9000:5301:5f00::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-351.awsdns-43.com`
		A	205.251.193.95^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-351.awsdns-43.com`
NS	`ns-1217.awsdns-24.org`
		A	2600:9000:5304:c100::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1217.awsdns-24.org`
		A	205.251.196.193^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1217.awsdns-24.org`
NS	`ns-1712.awsdns-22.co.uk`
		A	2600:9000:5306:b000::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1712.awsdns-22.co.uk`
		A	205.251.198.176^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1712.awsdns-22.co.uk`
NS	`ns-699.awsdns-23.net`
		A	2600:9000:5302:bb00::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-699.awsdns-23.net`
		A	205.251.194.187^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-699.awsdns-23.net`
SOA	`ns-351.awsdns-43.com`awsdns-hostmaster@amazon.com serial=1

`app`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns-tld1.charlestonroadregistry.com` ⭐
	NS	`ns-tld2.charlestonroadregistry.com`
	NS	`ns-tld3.charlestonroadregistry.com`
	NS	`ns-tld4.charlestonroadregistry.com`
	NS	`ns-tld5.charlestonroadregistry.com`
	SOA	`ns-tld1.charlestonroadregistry.com`cloud-dns-hostmaster@google.com serial=101427

🔒 HSTS Preload (+subdomains)

Same first word

interviewprep.info

interviewprep.app

interviewprep.co

Similar names

prepinterview.com

DNS History

16 records (7 active, 9 former)

●NSns-1217.awsdns-24.org2026-03-19 → 2026-07-01 · 2 obs

● 2026-03-19 06:02:34
● 2026-07-01 14:12:08

●NSns-1712.awsdns-22.co.uk2026-03-19 → 2026-07-01 · 2 obs

● 2026-03-19 06:02:34
● 2026-07-01 14:12:08

●NSns-351.awsdns-43.com2026-03-19 → 2026-07-01 · 2 obs

● 2026-03-19 06:02:34
● 2026-07-01 14:12:08

●NSns-699.awsdns-23.net2026-03-19 → 2026-07-01 · 2 obs

● 2026-03-19 06:02:34
● 2026-07-01 14:12:08

○A100.50.56.1322026-03-23 → 2026-03-30 · 5 obs

○ 2026-03-19 06:02:34
● 2026-03-23 13:13:50
● 2026-03-30 08:20:40
○ 2026-07-01 12:18:54
○ 2026-07-01 14:12:08

●A100.59.135.1612026-07-01 → 2026-07-01 · 3 obs

○ 2026-03-30 08:20:40
● 2026-07-01 12:18:54
● 2026-07-01 14:12:08

○A13.219.190.532026-03-19 → 2026-03-19 · 3 obs

● 2026-03-19 06:02:34
○ 2026-03-23 13:13:50
○ 2026-07-01 14:12:08

○A3.218.104.1742026-03-23 → 2026-03-30 · 5 obs

○ 2026-03-19 06:02:34
● 2026-03-23 13:13:50
● 2026-03-30 08:20:40
○ 2026-07-01 12:18:54
○ 2026-07-01 14:12:08

○A3.92.220.1542026-03-19 → 2026-07-01 · 2 obs

○ 2026-03-19 06:02:34
○ 2026-07-01 14:12:08

○A32.192.98.252026-03-19 → 2026-03-19 · 3 obs

● 2026-03-19 06:02:34
○ 2026-03-23 13:13:50
○ 2026-07-01 14:12:08

○A34.199.76.1452026-03-19 → 2026-03-19 · 3 obs

● 2026-03-19 06:02:34
○ 2026-03-23 13:13:50
○ 2026-07-01 14:12:08

○A34.232.156.92026-03-23 → 2026-03-30 · 5 obs

○ 2026-03-19 06:02:34
● 2026-03-23 13:13:50
● 2026-03-30 08:20:40
○ 2026-07-01 12:18:54
○ 2026-07-01 14:12:08

○A35.174.89.1102026-03-19 → 2026-07-01 · 2 obs

○ 2026-03-19 06:02:34
○ 2026-07-01 14:12:08

●A50.16.197.872026-07-01 → 2026-07-01 · 3 obs

○ 2026-03-30 08:20:40
● 2026-07-01 12:18:54
● 2026-07-01 14:12:08

●A54.174.68.802026-07-01 → 2026-07-01 · 3 obs

○ 2026-03-30 08:20:40
● 2026-07-01 12:18:54
● 2026-07-01 14:12:08

○A54.88.123.1632026-03-19 → 2026-07-01 · 2 obs

○ 2026-03-19 06:02:34
○ 2026-07-01 14:12:08

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
app	ns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com...	-
interviewprep.app	ns-1217.awsdns-24.org, ns-699.awsdns-23.net, ns-351.awsdns-43.com, ns-1712.awsdns-22.co.uk	-

✅ Authoritative Response

Server:205.251.198.176

NS records: ns-1217.awsdns-24.org, ns-699.awsdns-23.net, ns-351.awsdns-43.com, ns-1712.awsdns-22.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for interviewprep.app (unsigned zone)

⏱️ Timing

Total: 643ms | Queries: -

📄 Records

Type	Count	Sample Data
A	3	`50.16.197.87, 100.59.135.161...`
NS	4	`ns-1217.awsdns-24.org, ns-1712.awsdns-22.co.uk...`
SOA	1	`ns-351.awsdns-43.com awsdns-hostmaster.a`

Analysis

IP Addresses

interviewprep.app points to three IP numbers, namely 50.16.197.87, 54.174.68.80 and 100.59.135.161.

Other host names, among them ww.smartcatalogiq.net and ec2-54-174-68-80.compute-1.amazonaws.com, have IP numbers in common with interviewprep.app.

Name Servers

Four name servers handle the delegation for interviewprep.app: ns-351.awsdns-43.com, ns-699.awsdns-23.net, ns-1217.awsdns-24.org and ns-1712.awsdns-22.co.uk.

At least some of interviewprep.app's name servers are shared with other domains, for example direkt-ficken.com, bryanrojas.net, uomboletas.com.ar and two more.

Four hostnames, each resolving to a pair of IP addresses: ns-351.awsdns-43.com directs to 205.251.193.95 and 2600:9000:5301:5f00::1; ns-699.awsdns-23.net directs to 205.251.194.187 and 2600:9000:5302:bb00::1; ns-1217.awsdns-24.org directs to 205.251.196.193 and 2600:9000:5304:c100::1; ns-1712.awsdns-22.co.uk directs to 205.251.198.176 and 2600:9000:5306:b000::1.