🌐 duolingo.org 200 🔒 SSL Valid
Checked: just now 🔗 Visit site
↪
This domain forwards to duolingo.com (checked 0d ago)
HTTP Status ?A three-digit code showing if the site loaded successfully (200), redirects (301/302), or has errors (4xx/5xx).Read more →
200
SSL Expires ?When the SSL certificate expires. An expired certificate causes browser security warnings.Read more →
in 195d
Domain Expires ?When the domain registration expires. If not renewed, the domain becomes available to others.Read more →
in 90d
Hosting ?The company and location where this website's server is physically located.Read more →
Unknown
Security ?Score based on key HTTP security headers: HSTS, Content-Security-Policy, and X-Frame-Options.Read more →
1/3
IP Address ?The numerical address of the server hosting this website. Reveals location, provider, and network.Read more →
44.216.70.103
Performance ?Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability.
33 mob
Uptime
100%
⚡ Performance ?Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability. 33
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Mobile
33
Score
82
Accessibility
77
Best Practices
100
SEO
LCP 12.26s
CLS 0.000
FCP 4.85s
TTFB 0.00s
TBT 2,024ms
SI 5.92s
Checked: 2026-09-05 10:16:01.648507 · View on PageSpeed
🛠️ Tech Stack ?Technologies detected on this website: CMS, frameworks, libraries, CDN, and analytics tools.
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No technologies detected

📸 Screenshot
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Screenshot not available yet.

🌐 DNS Records ?DNS translates domain names to IP addresses. Records control where the site, email, and services are directed.Read more →
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A (IPv4)184.192.161.22844.195.214.23618.232.212.17244.216.70.10334.205.213.19135.172.6.9
NSns-1465.awsdns-55.orgns-2028.awsdns-61.co.ukns-350.awsdns-43.comns-798.awsdns-35.net
📋 WHOIS / RDAP ?Public registration data: who registered the domain, when, and when it expires.Read more →
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RegistrarAmazon Registrar, Inc.
Registered2010-01-26
Expires2027-01-26 (in 90 days)
Last Updated2026-08-12
Statusclient transfer prohibited
🔒 SSL Certificate ?Encrypts the connection between browsers and this website. Valid SSL = HTTPS works.Read more → Valid
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Subject (CN)*.duolingo.com
IssuerAmazon
Valid From2026-10-26
Valid Until2027-05-11 (195 days left)
SANs (1)*.duolingo.com
📡 HTTP Headers ?Metadata sent by the server: reveals software, caching rules, and security configuration.Read more →
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Status200
Serverduo-api
Content-Typetext/html; charset=UTF-8
Final URLhttps://www.duolingo.com/
x-frame-optionsSAMEORIGIN
cache-controlno-store, no-cache, must-revalidate, proxy-revalidate
x-cacheMiss from cloudfront
via1.1 2e68bae5207d24f606e0c5cddb663912.cloudfront.net (CloudFront)
Security headers ?HTTP headers that protect visitors from attacks. HSTS forces HTTPS, CSP controls resource loading, X-Frame-Options prevents clickjacking.Read more →
HSTS
Content-Security-Policy
X-Frame-Options
🏠 Hosting ?Physical infrastructure: where the server is, who operates it, and what network it belongs to.Read more →
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IP Address44.216.70.103
ProviderUnknown
OrganizationN/A
ASNN/A
LocationN/A
🛡️ Security Score F (2/7)
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Valid SSL
HSTS
CSP
X-Frame-Options
X-Content-Type
Referrer-Policy
Permissions-Policy
🗺️ Sitemap & Robots
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No robots.txt
This site has no robots.txt file, so crawlers may access everything by default.
Sitemap Not found
🔗 Social & Meta Tags
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No meta tags detected.

📧 Mail Security ?Email authentication records (SPF & DMARC) that prevent spoofing and phishing from this domain.Read more →
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SPFNot set
DMARCNot set
🌍 Other TLDs ?Other top-level domain variants of this domain name and their availability. 21 active 1 for sale 1 available
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.com ●
.net ●
.org current
.info ●
.io ●
.co ●
.dev taken
.app ●
.me ●
.biz ●
.eu ●
.xyz ●
.fi Available
.se ●
.de ●
.uk ●
.fr ●
.nl ●
.es ●
.it ●
.us ●
.ca ●
.com.au ●
.co.uk ●
📡 Uptime Monitor
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Current Status 🟢 Redirect
HTTP Status 302
Response Time 10083ms
Last Checked 2026-10-21 17:46:35.974249
Uptime (30d) 100%