Websites blocking CCBot
The crawler of the Common Crawl nonprofit, which publishes a free archive of web data. That archive is one of the most widely used sources of LLM training data, so blocking CCBot is a common proxy for opting out of AI training generally.
Operated by Common Crawl · Training crawler · operator documentation
5.92%
block CCBot
1.46 million of 24.68 million domains with a known robots.txt policy
2.54%
block it by name
627K domains, the rest inherit a blanket
* block
2.62%
restrict it by name
646K domains name it and close some of its paths
5.62%
name it in robots.txt
1.39 million domains give it rules of their own
Data for Oct 2026. All four percentages
divide by the same 24.68 million domains. Blocked counts both
explicit User-agent: CCBot blocks and blanket
* blocks the crawler inherits.
Blocking trend
5%
10%
15%
Aug 2026
Sep 2026
Oct 2026
Share of domains with a known robots.txt policy
blocking CCBot in each monthly crawl. The denominator moves with each crawl and is
defined in the methodology.
Historical mentions, HTTP Archive
2.5%
5%
7.5%
10%
Jul 2021
Oct 2022
Feb 2024
Jun 2025
Sep 2026
Share of sites in each month's
HTTP Archive crawl whose robots.txt named
CCBot. This series counts
mentions only (the archive keeps no rule text), comes from a different population than our own
crawl above, and the two are never merged.
High-authority sites blocking CCBot by name
| Domain | OPROpen Page Rank | Blocking since |
|---|---|---|
| linkedin.com | 9.82/10 | Aug 2026 |
| vimeo.com | 9.54/10 | Sep 2026 |
| cloudfront.net | 9.47/10 | Oct 2026 |
| nytimes.com | 9.28/10 | Aug 2026 |
| tumblr.com | 9.27/10 | Aug 2026 |
| yahoo.com | 9.27/10 | Oct 2026 |
| cnn.com | 9.16/10 | Oct 2026 |
| amazon.co.jp | 9.16/10 | Sep 2026 |
| substack.com | 9.13/10 | Oct 2026 |
| amazon.de | 9.13/10 | Oct 2026 |
| cookielaw.org | 9.10/10 | Aug 2026 |
| usatoday.com | 9.08/10 | Sep 2026 |
| giphy.com | 9.07/10 | Oct 2026 |
| sagepub.com | 9.07/10 | Oct 2026 |
| wired.com | 9.07/10 | Oct 2026 |
| bandcamp.com | 9.06/10 | Aug 2026 |
| lnkd.in | 9.05/10 | Aug 2026 |
| pexels.com | 9.03/10 | Aug 2026 |
| cbc.ca | 9.03/10 | Oct 2026 |
| pixabay.com | 9.02/10 | Oct 2026 |
| apnews.com | 9.02/10 | Sep 2026 |
| fastcompany.com | 9.00/10 | Oct 2026 |
| upenn.edu | 9.00/10 | Oct 2026 |
| naver.com | 8.99/10 | Oct 2026 |
| goodreads.com | 8.99/10 | Oct 2026 |
| healthline.com | 8.98/10 | Aug 2026 |
| nhk.or.jp | 8.98/10 | Aug 2026 |
| media-amazon.com | 8.95/10 | Aug 2026 |
| ebay.com | 8.95/10 | Oct 2026 |
| science.org | 8.95/10 | Oct 2026 |
Sites whose robots.txt names CCBot (or a legacy
alias) with a full block, ranked by Open Page Rank. Sites blocking every crawler with a blanket
* rule are counted above but not listed here. Since dates start at our first
observation of the rule.