🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`hackerrank.app`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::6815:2af0^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3033::ac43:d56b^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.42.240^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.213.107^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`elsa.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a6f^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elsa.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c06f^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`elsa.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:206f^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`elsa.ns.cloudflare.com`
		A	108.162.192.111^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elsa.ns.cloudflare.com`
		A	172.64.32.111^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elsa.ns.cloudflare.com`
		A	173.245.58.111^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elsa.ns.cloudflare.com`
NS	`neil.ns.cloudflare.com`
		A	2606:4700:58::adf5:3bd3^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`neil.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1d3^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`neil.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21d3^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`neil.ns.cloudflare.com`
		A	108.162.193.211^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`neil.ns.cloudflare.com`
		A	172.64.33.211^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`neil.ns.cloudflare.com`
		A	173.245.59.211^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`neil.ns.cloudflare.com`
MX	`eforward1.registrar-servers.com` ⭐
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
MX	`eforward2.registrar-servers.com` ⭐
		A	162.255.118.52^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward2.registrar-servers.com`
MX	`eforward3.registrar-servers.com` ⭐
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
MX	`eforward4.registrar-servers.com`⁽¹⁵⁾
		A	162.255.118.52^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward2.registrar-servers.com`
MX	`eforward5.registrar-servers.com`⁽²⁰⁾
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
TXT	`v=spf1 include:spf.efwd.registrar-servers.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.42.240, 172.67.213.107
		IPv6 hints	2606:4700:3033::6815:2af0, 2606:4700:3033::ac43:d56b
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=232, name=cloudflare-ech.com
SOA	`elsa.ns.cloudflare.com`dns@cloudflare.com serial=2413639418

`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

hackerrank.de

hackerrank.co.uk

hackerrank.app

hackerrank.jobs

hackerrank.bio

hackerrank.net

hackerrank.in

hackerrank.link

hackerrank.es

hackerrank.gq

hackerrank.me

hackerrank.org

hackerrank.com

hackerrank.ru

hackerrank.it

hackerrank.uk

hackerrank.io

hackerrank.co

hackerrank.fr

Similar names

rackerhank.workers.dev

rankhacker.com

karenkarch.com

rankerhack.com

rankhacker.ai

hackranker.com

Previous names

Next names

DNS History

15 records (11 active, 4 former)

●NSelsa.ns.cloudflare.com2026-08-26 → 2026-09-07 · 2 obs

● 2026-08-26 05:11:18
● 2026-09-07 13:38:14

●NSneil.ns.cloudflare.com2026-08-26 → 2026-09-07 · 2 obs

● 2026-08-26 05:11:18
● 2026-09-07 13:38:14

●MXeforward1.registrar-servers.com2026-08-26 → 2026-09-07 · 2 obs

● 2026-08-26 05:11:18
● 2026-09-07 13:38:14

●MXeforward2.registrar-servers.com2026-08-26 → 2026-09-07 · 2 obs

● 2026-08-26 05:11:18
● 2026-09-07 13:38:14

●MXeforward3.registrar-servers.com2026-08-26 → 2026-09-07 · 2 obs

● 2026-08-26 05:11:18
● 2026-09-07 13:38:14

●MXeforward4.registrar-servers.com2026-08-26 → 2026-09-07 · 2 obs

● 2026-08-26 05:11:18
● 2026-09-07 13:38:14

●MXeforward5.registrar-servers.com2026-08-26 → 2026-09-07 · 2 obs

● 2026-08-26 05:11:18
● 2026-09-07 13:38:14

●A104.21.42.2402026-08-30 → 2026-09-07 · 5 obs

○ 2026-08-26 05:11:18
● 2026-08-30 09:05:10
○ 2026-09-05 01:23:24
● 2026-09-07 13:38:10
● 2026-09-07 13:38:14

●A172.67.213.1072026-08-30 → 2026-09-07 · 5 obs

○ 2026-08-26 05:11:18
● 2026-08-30 09:05:10
○ 2026-09-05 01:23:24
● 2026-09-07 13:38:10
● 2026-09-07 13:38:14

○A188.114.96.02026-08-26 → 2026-09-05 · 5 obs

● 2026-08-26 05:11:18
○ 2026-08-30 09:05:10
● 2026-09-05 01:23:24
○ 2026-09-07 13:38:10
○ 2026-09-07 13:38:14

○A188.114.97.02026-08-26 → 2026-09-05 · 5 obs

● 2026-08-26 05:11:18
○ 2026-08-30 09:05:10
● 2026-09-05 01:23:24
○ 2026-09-07 13:38:10
○ 2026-09-07 13:38:14

●A2606:4700:3033::6815:2af02026-08-30 → 2026-09-07 · 5 obs

○ 2026-08-26 05:11:18
● 2026-08-30 09:05:10
○ 2026-09-05 01:23:24
● 2026-09-07 13:38:10
● 2026-09-07 13:38:14

●A2606:4700:3033::ac43:d56b2026-08-30 → 2026-09-07 · 5 obs

○ 2026-08-26 05:11:18
● 2026-08-30 09:05:10
○ 2026-09-05 01:23:24
● 2026-09-07 13:38:10
● 2026-09-07 13:38:14

○A2a06:98c1:3120::2026-08-26 → 2026-09-05 · 5 obs

● 2026-08-26 05:11:18
○ 2026-08-30 09:05:10
● 2026-09-05 01:23:24
○ 2026-09-07 13:38:10
○ 2026-09-07 13:38:14

○A2a06:98c1:3121::2026-08-26 → 2026-09-05 · 5 obs

● 2026-08-26 05:11:18
○ 2026-08-30 09:05:10
● 2026-09-05 01:23:24
○ 2026-09-07 13:38:10
○ 2026-09-07 13:38:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
app	ns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com...	-
hackerrank.app	elsa.ns.cloudflare.com, neil.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.58.111

NS records: elsa.ns.cloudflare.com, neil.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for hackerrank.app (unsigned zone)

⏱️ Timing

Total: 942ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.42.240, 172.67.213.107`
AAAA	2	`2606:4700:3033::6815:2af0, 2606:4700:3033::ac43:d56b`
NS	2	`elsa.ns.cloudflare.com, neil.ns.cloudflare.com`
MX	5	`eforward1.registrar-servers.com (pri: 10, eforward2.registrar-servers.com (pri: 10...`
TXT	1	`v=spf1 include:spf.efwd.registrar-server`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`elsa.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

hackerrank.app points to the four IP addresses 104.21.42.240, 172.67.213.107, 2606:4700:3033::6815:2af0 and 2606:4700:3033::ac43:d56b.

Among the host names that share IP numbers with hackerrank.app are gt108som.site, proctorabbit.com, butuhcuti.my.id and two others.

Name Servers

Two name servers handle the delegation for hackerrank.app: elsa.ns.cloudflare.com and neil.ns.cloudflare.com.

hackerrank.app has the same name server delegation as a number of other domains, such as cheapnikebasketballshoesonline.in.net, lemon.za.com, zantheravoi.com and two more.

At least some of hackerrank.app's name servers are shared with other domains, for example elkolys.workers.dev, sagbnmmbvhhb.workers.dev, natec.pl and two more.

Host names resolving to 6 IP numbers:

elsa.ns.cloudflare.com resolves to 108.162.192.111, 172.64.32.111 and 173.245.58.111 among others, with 3 other IP addresses in total.

neil.ns.cloudflare.com resolves to 108.162.193.211, 172.64.33.211 and 173.245.59.211 among others, with 3 other IP addresses in total.

Mail Servers

hackerrank.app has five mail servers, which are eforward1.registrar-servers.com, eforward2.registrar-servers.com, eforward3.registrar-servers.com and two others.

hackerrank.app shares at least some of its mail servers with other domains — for example lydiadecor.shop, modernlivinglane.com, iptvboutique.com and two more.

It is common to find these mail servers used together with the mail servers eforward4.registrar-servers.com and eforward5.registrar-servers.com.

Hosts that resolve to one IP address:

The hostname eforward1.registrar-servers.com resolves to 162.255.118.51.

The hostname eforward2.registrar-servers.com resolves to 162.255.118.52.

The hostname eforward3.registrar-servers.com resolves to 162.255.118.51.

The hostname eforward4.registrar-servers.com resolves to 162.255.118.52.

The hostname eforward5.registrar-servers.com resolves to 162.255.118.51.

eforward1.registrar-servers.com, eforward3.registrar-servers.com and eforward5.registrar-servers.com all direct to 162.255.118.51.

eforward2.registrar-servers.com along with eforward4.registrar-servers.com each resolve to 162.255.118.52 IP addresses.