🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`javascriptcourse.org`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::ac43:aa43^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3034::6815:3f49^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.63.73^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.170.67^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`gemma.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:261b^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`gemma.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c21b^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`gemma.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:221b^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`gemma.ns.cloudflare.com`
		A	108.162.194.27^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	162.159.38.27^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	172.64.34.27^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`justin.ns.cloudflare.com`
		A	2606:4700:58::adf5:3bbb^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`justin.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1bb^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`justin.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21bb^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`justin.ns.cloudflare.com`
		A	108.162.193.187^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`justin.ns.cloudflare.com`
		A	172.64.33.187^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`justin.ns.cloudflare.com`
		A	173.245.59.187^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`justin.ns.cloudflare.com`
MX	`mx1-hosting.jellyfish.systems` ⭐
		A	162.255.118.28^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`oxse3a.privateemail.com`
MX	`mx2-hosting.jellyfish.systems`⁽¹⁰⁾
		A	162.255.118.29^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`oxse2b.privateemail.com`
MX	`mx3-hosting.jellyfish.systems`⁽²⁰⁾
		A	162.255.118.13^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`mx3-hosting.jellyfish.systems`
TXT	`v=spf1 +a +mx +ip4:198.177.120.13 +ip4:198.177.120.14 include:spf.web-hosting...`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.63.73, 172.67.170.67
		IPv6 hints	2606:4700:3033::ac43:aa43, 2606:4700:3034::6815:3f49
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=9, name=cloudflare-ech.com
SOA	`gemma.ns.cloudflare.com`dns@cloudflare.com serial=2414568954

`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=1791194121

Same first word

javascriptcourse.org

javascriptcourse.pages.dev

javascriptcourse.com

Similar names

javascriptsource.com

Previous names

Next names

DNS History

9 records (9 active, 0 former)

●NSgemma.ns.cloudflare.com2026-09-15 → 2026-10-05 · 2 obs

● 2026-09-15 08:31:10
● 2026-10-05 10:31:16

●NSjustin.ns.cloudflare.com2026-09-15 → 2026-10-05 · 2 obs

● 2026-09-15 08:31:10
● 2026-10-05 10:31:16

●MXmx1-hosting.jellyfish.systems2026-09-15 → 2026-10-05 · 2 obs

● 2026-09-15 08:31:10
● 2026-10-05 10:31:16

●MXmx2-hosting.jellyfish.systems2026-09-15 → 2026-10-05 · 2 obs

● 2026-09-15 08:31:10
● 2026-10-05 10:31:16

●MXmx3-hosting.jellyfish.systems2026-09-15 → 2026-10-05 · 2 obs

● 2026-09-15 08:31:10
● 2026-10-05 10:31:16

●A104.21.63.732026-09-15 → 2026-10-05 · 2 obs

● 2026-09-15 08:31:10
● 2026-10-05 10:31:16

●A172.67.170.672026-09-15 → 2026-10-05 · 2 obs

● 2026-09-15 08:31:10
● 2026-10-05 10:31:16

●A2606:4700:3033::ac43:aa432026-09-15 → 2026-10-05 · 2 obs

● 2026-09-15 08:31:10
● 2026-10-05 10:31:16

●A2606:4700:3034::6815:3f492026-09-15 → 2026-10-05 · 2 obs

● 2026-09-15 08:31:10
● 2026-10-05 10:31:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
javascriptcourse.org	justin.ns.cloudflare.com, gemma.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.193.187

NS records: justin.ns.cloudflare.com, gemma.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for javascriptcourse.org (unsigned zone)

⏱️ Timing

Total: 1569ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.170.67, 104.21.63.73`
AAAA	2	`2606:4700:3034::6815:3f49, 2606:4700:3033::ac43:aa43`
NS	2	`gemma.ns.cloudflare.com, justin.ns.cloudflare.com`
MX	3	`mx2-hosting.jellyfish.systems (pri: 10), mx3-hosting.jellyfish.systems (pri: 20)...`
TXT	1	`v=spf1 +a +mx +ip4:198.177.120.13 +ip4:1`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`gemma.ns.cloudflare.com dns.cloudflare.c`

Analysis

IP Addresses

javascriptcourse.org resolves to four IP addresses: 104.21.63.73, 172.67.170.67, 2606:4700:3033::ac43:aa43 and 2606:4700:3034::6815:3f49.

kirstendietz.com, pousadabahiamorena.com, www.siemreap.net plus two other host names have IP numbers in common with javascriptcourse.org.

Name Servers

javascriptcourse.org is delegated to two name servers: gemma.ns.cloudflare.com and justin.ns.cloudflare.com.

The name server configuration of javascriptcourse.org is shared with other domains, for instance notedsuite-web.pages.dev, just-punctuations-w6hc.pages.dev, cnc-router-svg-feed-yt3e.pages.dev and two others.

javascriptcourse.org partially shares its NS delegation with several other domains, including icefrogau1.com, chnorilemutasa.space, jetemiasassuncao953.workers.dev and two others.

These name servers often co-occur with the name servers seamus.ns.cloudflare.com.

Hosts with 6 IP addresses each:

gemma.ns.cloudflare.com resolves to 108.162.194.27, 162.159.38.27, 172.64.34.27 and 3 other IP addresses.

justin.ns.cloudflare.com resolves to 108.162.193.187, 172.64.33.187, 173.245.59.187 and 3 other IP addresses.

Mail Servers

javascriptcourse.org uses three mail servers — mx1-hosting.jellyfish.systems, mx2-hosting.jellyfish.systems and mx3-hosting.jellyfish.systems.

At least some of the mail servers used by javascriptcourse.org are shared with other domains: pragmatic138joa.site, kristenphilipkoski.com, betlulu.com and two others among them.

mx1-hosting.jellyfish.systems, mx2-hosting.jellyfish.systems and mx3-hosting.jellyfish.systems each resolve to a single IP address: mx1-hosting.jellyfish.systems resolves to 162.255.118.28, mx2-hosting.jellyfish.systems resolves to 162.255.118.29 and mx3-hosting.jellyfish.systems resolves to 162.255.118.13.

javascriptcourse.org - robtex.com