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Domain report

flat.io

flat.io ranks in the top 0.015% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 17 distinct hosts observed under it.

Explore flat.io in the Web Graph

Connectivity

#20,159harmonic-centrality rank
Top percentile
0.015%
Hosts observed
17

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://flat.io/ answered with HTTP 200.

DNS records

A
  • 144.126.249.236
AAAA
  • 2604:a880:800:14:0:3:34bc:3000
MX
  • 1 aspmx.l.google.com.
  • 10 aspmx2.googlemail.com.
  • 10 aspmx3.googlemail.com.
  • 5 alt1.aspmx.l.google.com.
  • 5 alt2.aspmx.l.google.com.
NS
  • ns-1302.awsdns-34.org.
  • ns-1638.awsdns-12.co.uk.
  • ns-423.awsdns-52.com.
  • ns-746.awsdns-29.net.
AS
Server in network DIGITALOCEAN-ASN, AS14061 · United States144.126.249.0/24, which holds 144.126.249.236

Live preview

Screenshot of flat.io

This site sends "X-Frame-Options: SAMEORIGIN", which blocks embedding it here.

Since flat.io can't be embedded live, this is a captured screenshot instead — a snapshot from whenever it was last rendered, not necessarily this exact moment.

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;charset=utf-8
Cache-Control
no-store, no-cache, must-revalidate, max-age=0
Content-Encoding
Not sent

Security

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

What each security header does

Redirect chain

  1. 1.http://flat.io/HTTP 301

    → https://flat.io/

  2. 2.https://flat.io/HTTP 200

Meta tags

Title
Music Notation Software for Web, Desktop & Mobile – Flat
Description
Flat is intuitive music notation software for Mac, Windows, web, iOS & Android. Compose, collaborate, play & print sheet music from any device.
Canonical
https://flat.io
Robots
Not set
Generator
Not set
Open Graph title
Not set
Open Graph description
Not set
Open Graph image
Not set
Open Graph type
Not set
Twitter card
summary_large_image
Twitter title
Music Notation Software for Web, Desktop & Mobile – Flat
Twitter image
https://resources.flat-cdn.com/site/flat/meta-image/en/meta-image.png

robots.txt

Disallow rules (User-agent: *)
4
Disallow rules (other agents)
0

Sitemaps declared:

  • https://flat.io/sitemap_index.xml
  • https://flat.io/developers/docs/sitemap.xml
  • https://flat.io/sitemaps/scores.xml
  • https://flat.io/sitemaps/profiles.xml

Technology detected

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

  • Cloudflarecdn

    Server: cloudflare

  • Nuxtframework

    Found "/_nuxt/" in the page's HTML

Related domains

Similar connectivity

Domains ranked just above and below it in the same snapshot.