javascriptcourse.org - dns.ninja
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 | 104.21.63.73Cloudflare104.21.48.0/20 , 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 | ||||||
| PTR | gemma.ns.cloudflare.com | ||||||
| A | 162.159.38.27Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | gemma.ns.cloudflare.com | ||||||
| A | 172.64.34.27🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | gemma.ns.cloudflare.com | ||||||
| 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=198, name=cloudflare-ech.com | ||||||
| SOA | gemma.ns.cloudflare.comdns@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.infohostmaster@donuts.email serial=1791061075 | ||||||
Same first word
javascriptcourse.org |
javascriptcourse.pages.dev |
javascriptcourse.com |
Similar names
Previous names
Next names
DNS History
9 records (9 active, 0 former)
●NSgemma.ns.cloudflare.com2026-09-15 → 2026-10-03 · 2 obs
● 2026-10-03 21:18:18
●NSjustin.ns.cloudflare.com2026-09-15 → 2026-10-03 · 2 obs
● 2026-10-03 21:18:18
●MXmx1-hosting.jellyfish.systems2026-09-15 → 2026-10-03 · 2 obs
● 2026-10-03 21:18:18
●MXmx2-hosting.jellyfish.systems2026-09-15 → 2026-10-03 · 2 obs
● 2026-10-03 21:18:18
●MXmx3-hosting.jellyfish.systems2026-09-15 → 2026-10-03 · 2 obs
● 2026-10-03 21:18:18
●A104.21.63.732026-09-15 → 2026-10-03 · 2 obs
● 2026-10-03 21:18:18
●A172.67.170.672026-09-15 → 2026-10-03 · 2 obs
● 2026-10-03 21:18:18
●A2606:4700:3033::ac43:aa432026-09-15 → 2026-10-03 · 2 obs
● 2026-10-03 21:18:18
●A2606:4700:3034::6815:3f492026-09-15 → 2026-10-03 · 2 obs
● 2026-10-03 21:18:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | b2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org | - |
| javascriptcourse.org | gemma.ns.cloudflare.com, justin.ns.cloudflare.com | - |
✅ Authoritative Response
Server:172.64.33.187
NS records: gemma.ns.cloudflare.com, justin.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for javascriptcourse.org (unsigned zone)
⏱️ Timing
Total: 616ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.63.73, 172.67.170.67 |
| 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 directs to four IP numbers, which are 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 and two other host names share IP numbers with javascriptcourse.org.
Name Servers
javascriptcourse.org is served by two delegated name servers, gemma.ns.cloudflare.com and justin.ns.cloudflare.com.
javascriptcourse.org uses the same name servers as several other domains — among them notedsuite-web.pages.dev, just-punctuations-w6hc.pages.dev, cnc-router-svg-feed-yt3e.pages.dev and two more.
There is at least partial name server overlap between javascriptcourse.org and other domains — icefrogau1.com, chnorilemutasa.space, jetemiasassuncao953.workers.dev and two more among them.
These name servers are routinely deployed together with the name servers seamus.ns.cloudflare.com.
Hostnames that resolve to 6 IP addresses:
gemma.ns.cloudflare.com carries IP addresses 108.162.194.27, 162.159.38.27 and 172.64.34.27, with 3 other addresses beyond those.
justin.ns.cloudflare.com carries IP addresses 108.162.193.187, 172.64.33.187 and 173.245.59.187, with 3 other addresses beyond those.
Mail Servers
Incoming mail for javascriptcourse.org is delivered via three mail servers: mx1-hosting.jellyfish.systems, mx2-hosting.jellyfish.systems and mx3-hosting.jellyfish.systems.
javascriptcourse.org has at least partial mail server overlap with other domains such as pragmatic138joa.site, kristenphilipkoski.com, betlulu.com and two more.
Three hostnames, one IP address apiece: 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.