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readme.app 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 87d
Domain Expires When the domain registration expires. If not renewed, the domain becomes available to others.Read more →
in 198d
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 →
0/3
IP Address The numerical address of the server hosting this website. Reveals location, provider, and network.Read more →
104.21.21.200
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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Performance data not available yet.
Tech Stack Technologies detected on this website: CMS, frameworks, libraries, CDN, and analytics tools. 1
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🌐 CDN
Cloudflare
Screenshot
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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) | 104.21.21.200172.67.200.22 |
| AAAA (IPv6) | 2606:4700:3032::ac43:c8162606:4700:3031::6815:15c8 |
| NS | lily.ns.cloudflare.comkeanu.ns.cloudflare.com |
| MX | 100 route1.mx.cloudflare.net53 route2.mx.cloudflare.net59 route3.mx.cloudflare.net |
| TXT (1) |
v=spf1 include:_spf.mx.cloudflare.net -all |
WHOIS / RDAP Public registration data: who registered the domain, when, and when it expires.Read more →
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| Registrar | Porkbun LLC |
| Registered | 2018-05-05 |
| Expires | 2027-05-05 (in 198 days) |
| Last Updated | 2026-07-09 |
| Status | client delete prohibitedclient 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) | readme.app |
| Issuer | Google Trust Services |
| Valid From | 2026-10-16 |
| Valid Until | 2027-01-14 (87 days left) |
| SANs (1) | readme.app |
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://readme.app/ |
| x-content-type-options | nosniff |
| referrer-policy | strict-origin-when-cross-origin |
| cache-control | public, max-age=0, must-revalidate |
| cf-ray | a4c956a789d81eec-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 | 104.21.21.200 |
| Provider | Unknown |
| Organization | N/A |
| ASN | N/A |
| Location | N/A |
Security Score
D (3/7)
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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.
No paths are disallowed — everything is crawlable.
| Sitemap | Not found |
Social & Meta Tags
Missing
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| Title | readme |
| Language | de-CH |
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 -all |
| DMARC | ✓ Present v=DMARC1; p=reject; rua=mailto:[email protected],mailto:[email protected] |
| MX Records | 100 → route1.mx.cloudflare.net 53 → route2.mx.cloudflare.net 59 → route3.mx.cloudflare.net |
Other TLDs Other top-level domain variants of this domain name and their availability. 19 active 4 for sale
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Uptime Monitor
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| Current Status | 🟢 Online |
| HTTP Status | 200 |
| Response Time | 111ms |
| Last Checked | 2026-10-18 08:00:53.278791 |
| Uptime (30d) | 100% |
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