🌐 ycombinator.uk 526 🔒 SSL Valid
Checked: just now 🔗 Visit site
HTTP Status ?A three-digit code showing if the site loaded successfully (200), redirects (301/302), or has errors (4xx/5xx).Read more →
526
SSL Expires ?When the SSL certificate expires. An expired certificate causes browser security warnings.Read more →
in 80d
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 →
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 →
104.21.64.59
Performance ?Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability.
100 mob
Uptime
100%
⚡ Performance ?Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability. 100
▼
Mobile
100
Score
68
Accessibility
96
Best Practices
45
SEO
LCP 0.77s
CLS 0.000
FCP 0.77s
TTFB 0.00s
TBT 0ms
SI 0.77s
Desktop
100
Score
68
Accessibility
96
Best Practices
45
SEO
LCP 0.21s
CLS 0.000
FCP 0.21s
TTFB 0.00s
TBT 0ms
SI 0.26s
Checked: 2026-09-05 10:33:46.088015 · View on PageSpeed
🛠️ Tech Stack ?Technologies detected on this website: CMS, frameworks, libraries, CDN, and analytics tools. 1
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🌐 CDN
Cloudflare
📸 Screenshot Processing...
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⏳

Screenshot is being captured...

🌐 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)172.67.176.168104.21.64.59
AAAA (IPv6)2606:4700:3034::6815:403b2606:4700:3031::ac43:b0a8
NSzelda.ns.cloudflare.comterry.ns.cloudflare.com
MX4 route1.mx.cloudflare.net81 route2.mx.cloudflare.net2 route3.mx.cloudflare.net
TXT (2)
Services configured via TXT:
Google
Show all TXT records
v=spf1 include:_spf.mx.cloudflare.net include:spf.mtasv.net ~all
google-site-verification=4DOYFN37i7eV0GHHsXiTzzaELk05F4j_ZcHrV8emVUs
📋 WHOIS / RDAP ?Public registration data: who registered the domain, when, and when it expires.Read more →
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RegistrarN/A
RegisteredN/A
ExpiresN/A
Last UpdatedN/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.uk
IssuerGoogle Trust Services
Valid From2026-10-09
Valid Until2027-01-07 (80 days left)
SANs (2)ycombinator.uk*.ycombinator.uk
📡 HTTP Headers ?Metadata sent by the server: reveals software, caching rules, and security configuration.Read more →
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Status526
Servercloudflare
Content-Typetext/plain; charset=UTF-8
Final URLhttps://ycombinator.uk/
x-frame-optionsSAMEORIGIN
referrer-policysame-origin
cache-controlprivate, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
cf-raya4c97fcc8e919c70-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 Address104.21.64.59
ProviderUnknown
OrganizationN/A
ASNN/A
LocationN/A
🛡️ Security Score D (3/7)
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Valid SSL
HSTS
CSP
X-Frame-Options
X-Content-Type
Referrer-Policy
Permissions-Policy
🗺️ Sitemap & Robots
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Open to search engines
This site's robots.txt lets crawlers access its main content. Search engines can index it normally.
🤖
AI crawlers restricted — Amazonbot, Applebot-Extended, Bytespider, CCBot, ClaudeBot, Diffbot, Google-Extended, GPTBot …
Areas hidden from crawlers:
🚫 Entire site 1
Show raw disallow rules (1)
/
Sitemap Not found
🔗 Social & Meta Tags Missing
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Titleycombinator.uk | 526: Invalid SSL certificate
Languageen-US
📧 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.mx.cloudflare.net include:spf.mtasv.net ~all
DMARC✓ Present
v=DMARC1; p=quarantine; sp=quarantine; pct=100; adkim=s; aspf=r; fo=1; rua=mailto:[email protected]
MX Records
4 → route1.mx.cloudflare.net
81 → route2.mx.cloudflare.net
2 → route3.mx.cloudflare.net
🌍 Other TLDs ?Other top-level domain variants of this domain name and their availability. 17 active 6 available
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.com ●
.net ●
.org ●
.info ●
.io ●
.co ●
.dev ●
.app ●
.me ●
.biz ●
.eu Available
.xyz ●
.fi Available
.se Available
.de ●
.uk current
.fr ●
.nl Available
.es Available
.it ●
.us ●
.ca ●
.com.au Available
.co.uk ●
📡 Uptime Monitor
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Current Status 🟢 Server Error
HTTP Status 526
Response Time 124ms
Last Checked 2026-10-18 00:45:46.067975
Uptime (30d) 100%
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▼
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Similarity based on content analysis. More results appear as more domains are indexed.