Sonic

seo Sonic

Sonic web crawler for ranking analysis

About this crawler

Sonic is a web crawler identified by the regular-expression pattern Sonic in the User-Agent request header. It is categorised as seo. Use the regex above to detect, log, allow, or block Sonic traffic in your web server, CDN edge rules, or robots.txt.

Block-rate · top 25k sites

0.065%
latest snapshot
2026-06-04
matched key: Sonic
2026-05-012026-06-040.17%

Technical details

Name
Sonic
Pattern
Sonic
Tags
seo
Reference
https://www.yama.info.waseda.ac.jp/~crawler/info.html
Added
2016/02/08
Instances
3 known sample(s)

Sample User-Agent strings

Mozilla/5.0 (compatible; RankSonicSiteAuditor/1.0; +https://ranksonic.com/ranksonic_sab.html)
Mozilla/5.0 (compatible; Sonic/1.0; http://www.yama.info.waseda.ac.jp/~crawler/info.html)
Mozzila/5.0 (compatible; Sonic/1.0; http://www.yama.info.waseda.ac.jp/~crawler/info.html)

Block this crawler

robots.txt — disallow Sonic:

User-agent: Sonic Disallow: /

Apache .htaccess — return 403:

RewriteEngine On RewriteCond %{HTTP_USER_AGENT} Sonic [NC] RewriteRule .* - [F,L]

Nginx — return 403 inside a server block:

if ($http_user_agent ~* "Sonic") { return 403; }
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