01 · Operator
Who operates DomainAppender
- Company
- Profound Networks, LLC
- Type
- Other bot
- Official docs
- profound.net
02 · Behavior
What DomainAppender does
Clients supply company names and addresses. DomainAppender checks candidate websites to find the matching business domain. It revisits candidate sites to see if anything has changed.
03 · Impact
Why DomainAppender matters for your site
If you allow it
- Helps business databases list your correct website
- Respects robots.txt
If you block it
- Commercial data enrichment, not search traffic
- No published verification method
04 · Allow
How to allow DomainAppender
robots.txt
User-agent: DomainAppender
Allow: /Cloudflare
# Security › WAF › Custom rules › Create rule
Expression: (http.user_agent contains "DomainAppender")
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: DomainAppender
Allow: /nginx
# nginx serves every user agent by default.
# Make sure no rule like this blocks it:
# if ($http_user_agent ~* "DomainAppender") { return 403; }Apache
# Apache serves every user agent by default.
# Make sure .htaccess has no rule like this:
# RewriteCond %{HTTP_USER_AGENT} DomainAppender [NC]
# RewriteRule .* - [F,L]05 · Block
How to block DomainAppender
DomainAppender follows robots.txt, so one rule is enough. Use a server or CDN rule only to stop spoofed copies.
robots.txt
User-agent: DomainAppender
Disallow: /Cloudflare
# Security › WAF › Custom rules › Create rule
Expression: (http.user_agent contains "DomainAppender")
Action: BlockWordPress
# WordPress serves a virtual robots.txt. Edit it with your SEO plugin:
# Yoast: SEO › Tools › File editor · Rank Math: General Settings › Edit robots.txt
User-agent: DomainAppender
Disallow: /nginx
# In your server { } block:
if ($http_user_agent ~* "DomainAppender") {
return 403;
}Apache
# .htaccess
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} DomainAppender [NC]
RewriteRule .* - [F,L]
</IfModule>06 · User agents
User agents we see for DomainAppender
The user agent published by the operator:
Mozilla/5.0 (compatible; DomainAppender /1.0; +http://www.profound.net/domainappender)07 · Verification
Is it really DomainAppender?
DomainAppender’s operator publishes no IP ranges or hostnames, so requests cannot be verified. Treat the user agent as a claim, and watch your logs for unusual request rates.
FAQ
Questions about DomainAppender
What is DomainAppender?
It is a Profound Networks service that links company names and addresses to the correct business website.
Does DomainAppender respect robots.txt?
Yes. Its documentation states that DomainAppender respects robots.txt.
How do I block DomainAppender?
Add a robots.txt group for User-agent: DomainAppender with Disallow: /.
Last reviewed Oct 7, 2026