01 · Operator
Who operates ListSignalBot
- Company
- Keybloc Pte Ltd (ListSignal)
- Type
- Other bot
- Official docs
- listsignal.com
02 · Behavior
What ListSignalBot does
ListSignalBot visits public websites and records basic facts. These include the technology a site runs, its language, and whether it is a real business. ListSignal publishes the fixed IP addresses the crawler uses.
03 · Impact
Why ListSignalBot matters for your site
If you allow it
- Respects robots.txt
- Requests come from a published set of IP addresses
- Light data collection about site technology
If you block it
- No direct traffic benefit for your site
- Your site data feeds a commercial dataset
04 · Allow
How to allow ListSignalBot
robots.txt
User-agent: ListSignalBot
Allow: /Cloudflare
# Security › WAF › Custom rules › Create rule
Expression: (http.user_agent contains "ListSignalBot")
Action: Skip › All Super Bot Fight Mode rules
# Also check Security › Bots: "Block AI bots" can block it regardless of robots.txt.WordPress
# WordPress serves a virtual robots.txt. Edit it with your SEO plugin:
# Yoast: SEO › Tools › File editor · Rank Math: General Settings › Edit robots.txt
User-agent: ListSignalBot
Allow: /nginx
# nginx serves every user agent by default.
# Make sure no rule like this blocks it:
# if ($http_user_agent ~* "ListSignalBot") { return 403; }Apache
# Apache serves every user agent by default.
# Make sure .htaccess has no rule like this:
# RewriteCond %{HTTP_USER_AGENT} ListSignalBot [NC]
# RewriteRule .* - [F,L]05 · Block
How to block ListSignalBot
ListSignalBot follows robots.txt, so one rule is enough. Use a server or CDN rule only to stop spoofed copies.
robots.txt
User-agent: ListSignalBot
Disallow: /Cloudflare
# Security › WAF › Custom rules › Create rule
Expression: (http.user_agent contains "ListSignalBot")
Action: BlockWordPress
# WordPress serves a virtual robots.txt. Edit it with your SEO plugin:
# Yoast: SEO › Tools › File editor · Rank Math: General Settings › Edit robots.txt
User-agent: ListSignalBot
Disallow: /nginx
# In your server { } block:
if ($http_user_agent ~* "ListSignalBot") {
return 403;
}Apache
# .htaccess
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} ListSignalBot [NC]
RewriteRule .* - [F,L]
</IfModule>06 · User agents
User agents we see for ListSignalBot
| User agent | Share | Last seen | Status |
|---|---|---|---|
Mozilla/5.0 (compatible; ListSignalBot/1.0; +https://listsignal.com/bot) |
100% | Unverified |
07 · Verification
Is it really ListSignalBot?
Anyone can copy a user agent. Real ListSignalBot requests come from the IP ranges published at listsignal.com/bot.
FAQ
Questions about ListSignalBot
What is ListSignalBot?
It is the web crawler of ListSignal, operated by Keybloc Pte Ltd in Singapore. It records a site's technology, language and whether it is a real business.
How do I block ListSignalBot?
Add "User-agent: ListSignalBot" and "Disallow: /" to your robots.txt. ListSignal states the bot will then stop visiting.
How can I verify ListSignalBot?
ListSignal lists the IP addresses it crawls from on its bot page. Requests with this user agent from other addresses are not from ListSignal.
Last reviewed Oct 8, 2026