ycombinator.com 200
🔒 SSL Valid
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 141d
Domain Expires When the domain registration expires. If not renewed, the domain becomes available to others.Read more →
N/A
Hosting The company and location where this website's server is physically located.Read more →
AWS
Security Score based on key HTTP security headers: HSTS, Content-Security-Policy, and X-Frame-Options.Read more →
2/3
IP Address The numerical address of the server hosting this website. Reveals location, provider, and network.Read more →
108.138.64.8
Tech Stack Technologies detected on this website: CMS, frameworks, libraries, CDN, and analytics tools. 6
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📊 Analytics
Google Analytics
🌐 CDN
Cloudflare
🔤 Font/Icon
Google Fonts
⚙️ Framework
Laravel
☁️ Hosting
AWS
⚡ JS Framework
React
Screenshot 2026-08-20
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Captured: 2026-08-20 03:03:14 · 8.3 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) | 108.138.64.45108.138.64.8108.138.64.111108.138.64.90 |
| NS | ns-1411.awsdns-48.orgns-1914.awsdns-47.co.ukns-225.awsdns-28.comns-556.awsdns-05.net |
| MX | 10 aspmx.l.google.com20 alt1.aspmx.l.google.com20 alt2.aspmx.l.google.com30 aspmx4.googlemail.com |
| TXT | v=spf1 include:_spf.google.com include:mailgun.org a:rsweb1-36.investorflow.com include:_spf.createsend.com include:servers.mcsv.net -all MS=ms37374900 Wayback verify for support request 741082 ZOOM_verify_2ndw8KZxSRa8PT8NmdyXvw anthropic-domain-verification-0qe2ww=yK576oHdDgyTcXgkPfj1KXgGt apple-domain-verification=WG0sP5Alm7N6h1Te ca3-4861b957e83847c188e45d04ec314ee3 dropbox-domain-verification=asc63coma4mv google-site-verification=GJKdQskycEclAGPua3yXB9m_nVhxbrsVps_y-t9SXV0 google-site-verification=KsI69Y_jEVkp4eXqSQ9R9gwxjIpZznvuvrus6UolB9Y google-site-verification=rivq8jKu6AADGtbbEzJhmOpcqq08B7QxIzXxYV8DtyU openai-domain-verification=dv-QbhxxK0G0JK0dnyZ4YTsNAfw rippling-domain-verification=a660f7a4ab77a3de |
WHOIS / RDAP Public registration data: who registered the domain, when, and when it expires.Read more →
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| Registrar | N/A |
| Registered | N/A |
| Expires | N/A |
| Last Updated | N/A |
SSL Certificate Encrypts the connection between browsers and this website. Valid SSL = HTTPS works.Read more → Valid
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| Subject (CN) | ycombinator.com |
| Issuer | Amazon |
| Valid From | 2025-12-11 |
| Valid Until | 2027-01-08 (141 days left) |
| SANs (2) | ycombinator.com*.ycombinator.com |
HTTP Headers Metadata sent by the server: reveals software, caching rules, and security configuration.Read more →
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| Status | 200 |
| Server | cloudflare |
| Content-Type | text/html; charset=utf-8 |
| Final URL | https://www.ycombinator.com/ |
| strict-transport-security | max-age=63072000; includeSubDomains |
| x-frame-options | SAMEORIGIN |
| x-content-type-options | nosniff |
| referrer-policy | strict-origin-when-cross-origin |
| cache-control | max-age=0, private, must-revalidate |
| cf-ray | a2de1e624e57d65b-IAD |
Security headers HTTP headers that protect visitors from attacks. HSTS forces HTTPS, CSP controls resource loading, X-Frame-Options prevents clickjacking.Read more →
Hosting Physical infrastructure: where the server is, who operates it, and what network it belongs to.Read more →
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| IP Address | 108.138.64.8 |
| Provider | AWS |
| Organization | Amazon.com, Inc. |
| ASN | AS16509 |
| Country | US |
| City | Dulles Town Center |
Security Score
B (5/7)
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Sitemap & Robots
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| robots.txt | Found Open |
| Sitemap | Found 103 pages |
| Last modified | 2026-08-20 |
| Disallowed paths |
/verify/*
/library?categories=*&*
/library?*
/companies?*
|
Social & Meta Tags
Complete
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| Title | Y Combinator |
| Description | Y Combinator created a new model for funding early stage startups. Four times a year we invest in a large number of startups. |
| OG Title | Y Combinator |
| OG Description | Y Combinator created a new model for funding early stage startups. Four times a year we invest in a large number of startups. |
| OG Image | https://www.ycombinator.com/assets/ycdc/yc-og-image-c440a0ad1dacfb86eeeb343717479cc54d256614449b4ef719977a0a451f8bc8.png |
| OG Type | website |
| OG Site Name | Y Combinator |
| Twitter Card | summary_large_image |
| Language | en |
Mail Security Email authentication records (SPF & DMARC) that prevent spoofing and phishing from this domain.Read more →
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| SPF | ✓ Present v=spf1 include:_spf.google.com include:mailgun.org a:rsweb1-36.investorflow.com include:_spf.createsend.com include:servers.mcsv.net -all |
| DMARC | ✓ Present v=DMARC1; p=none; pct=100; sp=none; ruf=mailto:[email protected]; rua=mailto:[email protected]; aspf=r; |
| MX Records | 10 → aspmx.l.google.com 20 → alt1.aspmx.l.google.com 20 → alt2.aspmx.l.google.com 30 → aspmx4.googlemail.com |