🌐 codepen.app 403 🔒 SSL Valid
Checked: just now 🔗 Visit site
↪
This domain forwards to codepen.io (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 →
403
SSL Expires ?When the SSL certificate expires. An expired certificate causes browser security warnings.Read more →
in 64d
Domain Expires ?When the domain registration expires. If not renewed, the domain becomes available to others.Read more →
in 202d
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 →
3/3
IP Address ?The numerical address of the server hosting this website. Reveals location, provider, and network.Read more →
172.66.41.14
Performance ?Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability.
N/A
Uptime
100%
⚡ Performance ?Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability.
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Desktop
90
Score
99
Accessibility
81
Best Practices
100
SEO
LCP 1.43s
CLS 0.073
FCP 0.79s
TTFB 0.05s
TBT 76ms
SI 2.00s
Checked: 2026-09-02 18:56:03.93868 · 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 2026-09-01
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Screenshot of codepen.app
Captured: 2026-09-01 06:56:42 · 4.8 KB
🌐 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)172.66.42.242172.66.41.14
AAAA (IPv6)2606:4700:3108::ac42:290e2606:4700:3108::ac42:2af2
NSalbert.ns.cloudflare.comkristin.ns.cloudflare.com
TXT (1)
Services configured via TXT:
Google
Show all TXT records
google-site-verification=humm-5s3CaqcR7MAa7CV9hh0vsw4eAbSnCbrRLuciaM
📋 WHOIS / RDAP ?Public registration data: who registered the domain, when, and when it expires.Read more →
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RegistrarGoDaddy.com, LLC
Registered2018-05-08
Expires2027-05-08 (in 202 days)
Last Updated2026-06-22
Statusclient delete prohibitedclient renew prohibitedclient transfer prohibitedclient update prohibited
🔒 SSL Certificate ?Encrypts the connection between browsers and this website. Valid SSL = HTTPS works.Read more → Valid
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Subject (CN)codepen.app
IssuerGoogle Trust Services
Valid From2026-09-22
Valid Until2026-12-21 (64 days left)
SANs (2)codepen.app*.codepen.app
📡 HTTP Headers ?Metadata sent by the server: reveals software, caching rules, and security configuration.Read more →
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Status403
Servercloudflare
Content-Typetext/html; charset=UTF-8
Final URLhttps://codepen.io/
strict-transport-securitymax-age=31536000; includeSubDomains; preload
content-security-policydefault-src 'none'; script-src 'nonce-WntQEBaaWbIxHzBu2YatRK' 'unsafe-eval' https://challenges.cloudflare.com; script-src-attr 'none'; style-src 'unsafe-inline'; img-src 'self' https://challenges.cloudflare.com; connect-src 'self' https://challenges.cloudflare.com; frame-src 'self' https://challenges.cloudflare.com blob:; child-src 'self' https://challenges.cloudflare.com blob:; worker-src blob:; form-action http: https:; base-uri 'self'
x-frame-optionsSAMEORIGIN
x-content-type-optionsnosniff
referrer-policysame-origin
permissions-policyaccelerometer=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=(),xr-spatial-tracking=*
cf-raya4c2351aaa7ae3c6-IAD
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 Address172.66.41.14
ProviderUnknown
OrganizationN/A
ASNN/A
LocationN/A
🛡️ Security Score A (7/7)
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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. 7 active 2 for sale 14 available
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.com ●
.net ●
.org taken
.info ●
.io ●
.co Available
.dev ●
.app current
.me Available
.biz Available
.eu ●
.xyz Available
.fi Available
.se Available
.de ●
.uk Available
.fr Available
.nl taken
.es Available
.it Available
.us Available
.ca Available
.com.au Available
.co.uk Available
📡 Uptime Monitor
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Current Status 🟢 Client Error
HTTP Status 403
Response Time 211ms
Last Checked 2026-10-15 22:46:00.563987
Uptime (30d) 100%