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Domain report

sightreader.app

sightreader.app ranks in the top 0.14% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 1 distinct host observed under it.

Explore sightreader.app in the Web Graph

Connectivity

#186,293harmonic-centrality rank
Top percentile
0.14%
Hosts observed
1

From the Common Crawl cc-main-2026-jul-aug-sep hyperlink graph, 133,241,980 domains total. What this rank means

HTTPS reachability

200HTTP status

https://sightreader.app/ answered with HTTP 200.

DNS records

A
  • 172.67.220.123
  • 104.21.51.37
AAAA
  • 2606:4700:3034::ac43:dc7b
  • 2606:4700:3032::6815:3325
MX
  • 31 route3.mx.cloudflare.net.
  • 38 route2.mx.cloudflare.net.
  • 45 route1.mx.cloudflare.net.
NS
  • arnold.ns.cloudflare.com.
  • pola.ns.cloudflare.com.

Live preview

This is a live, sandboxed embed of sightreader.app — not a copy. What it shows can change any time the site itself does.

Domain registration (WHOIS / RDAP)

RDAP lookup failed (HTTP 429).

How to read WHOIS and RDAP data

SSL certificate

Certificate Transparency lookup failed (HTTP 429).

How to check when a certificate expires

HTTP & security headers

Response

Server
cloudflare
Content-Type
text/html
Cache-Control
public, max-age=14400, s-maxage=300, stale-while-revalidate=600
Content-Encoding
Not sent

Security

Content-Security-Policy
Not sent
Strict-Transport-Security
Not sent
X-Frame-Options
Not sent
X-Content-Type-Options
Not sent
Referrer-Policy
Not sent
Permissions-Policy
Not sent

What each security header does

Redirect chain

  1. 1.http://sightreader.app/HTTP 200

Meta tags

Title
SightReader | A better way to learn sight reading
Description
Build the confidence to read piano music on sight. Instant feedback, 3,700+ pieces and ABRSM Grades 1–8. Just five minutes a day, in your browser.
Canonical
https://sightreader.app/
Robots
Not set
Generator
Not set
Open Graph title
SightReader | A better way to learn sight reading
Open Graph description
Build the confidence to read piano music on sight. Instant feedback, 3,700+ pieces and ABRSM Grades 1–8. Just five minutes a day, in your browser.
Open Graph image
https://sightreader.app/homepage/homepage_og.webp
Open Graph type
website
Twitter card
summary_large_image
Twitter title
SightReader | A better way to learn sight reading
Twitter image
https://sightreader.app/homepage/homepage_og.webp

robots.txt

Disallow rules (User-agent: *)
137
Disallow rules (other agents)
2055

Sitemap declared:

  • https://sightreader.app/sitemap.xml

Technology detected

Best-effort, based on a small set of well-known signals — this may be incomplete.

  • Cloudflarecdn

    Server: cloudflare

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