peer39_crawler
Peer39 contextual advertising and brand safety crawler bot
About this crawler
peer39_crawler is a web crawler identified by the regular-expression pattern peer39_crawler in the User-Agent request header. It is categorised as advertising. Use the regex above to detect, log, allow, or block peer39_crawler traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.65%
Technical details
- Name
- peer39_crawler
- Pattern
peer39_crawler- Tags
- advertising
- Reference
- https://www.peer39.com/
- Added
- 2026/04/26
- Instances
- 1 known sample(s)
Sample User-Agent strings
peer39_crawler/1.0
Block this crawler
robots.txt — disallow peer39_crawler:
User-agent: peer39_crawler
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} peer39_crawler [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "peer39_crawler") {
return 403;
}
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