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Domain report

book.io

book.io ranks in the top 0.45% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 8 distinct hosts observed under it.

Explore book.io in the Web Graph

Connectivity

#594,755harmonic-centrality rank
Top percentile
0.45%
Hosts observed
8

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

DNS records

A
  • 104.26.12.116
  • 172.67.68.77
  • 104.26.13.116
AAAA
  • 2606:4700:20::ac43:444d
  • 2606:4700:20::681a:d74
  • 2606:4700:20::681a:c74
MX
  • 1 aspmx.l.google.com.
  • 10 alt3.aspmx.l.google.com.
  • 10 alt4.aspmx.l.google.com.
  • 5 alt1.aspmx.l.google.com.
  • 5 alt2.aspmx.l.google.com.
NS
  • meiling.ns.cloudflare.com.
  • west.ns.cloudflare.com.

Live preview

This is a live, sandboxed embed of book.io — 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; charset=UTF-8
Cache-Control
max-age=239, must-revalidate
Content-Encoding
Not sent

Security

Content-Security-Policy
Not sent
Strict-Transport-Security
max-age=0; includeSubDomains; preload
X-Frame-Options
Not sent
X-Content-Type-Options
nosniff
Referrer-Policy
Not sent
Permissions-Policy
Not sent

What each security header does

Redirect chain

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

    → https://book.io/

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

Meta tags

Title
Home - Book.io
Description
Book.io is a multi-chain Web3 marketplace for ebooks and Audiobooks where anyone can collect, read, and then resell what they buy – just like print books.
Canonical
https://book.io/
Robots
index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1
Generator
WordPress 6.8.2
Open Graph title
Book.io
Open Graph description
Book.io is a multi-chain Web3 marketplace for ebooks and Audiobooks where anyone can collect, read, and then resell what they buy – just like print books.
Open Graph image
http://book.io/wp-content/uploads/2023/09/FacebookOGImages-Future-of-Books.jpg
Open Graph type
website
Twitter card
summary_large_image
Twitter title
Book.io
Twitter image
https://book.io/wp-content/uploads/2023/09/FacebookOGImages-Future-of-Books.jpg

robots.txt

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

Sitemap declared:

  • https://book.io/sitemap_index.xml

Technology detected

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

  • Cloudflarecdn

    Server: cloudflare

  • WordPresscms

    <meta name="generator"> = "WordPress 6.8.2"

  • Google Analyticsanalytics

    Found "googletagmanager.com/gtag/js" in the page's HTML

Related domains

Similar connectivity

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