IABTechLabAds.txt

advertising IABTechLab[^/]*Ads\.txt

IAB Tech Lab ads.txt aggregator crawler

About this crawler

IABTechLabAds.txt is a web crawler identified by the regular-expression pattern IABTechLab[^/]*Ads\.txt in the User-Agent request header. It is categorised as advertising. Use the regex above to detect, log, allow, or block IABTechLabAds.txt traffic in your web server, CDN edge rules, or robots.txt.

Block-rate · top 25k sites

No block-rate data for this crawler.

Technical details

Name: IABTechLabAds.txt
Pattern: IABTechLab[^/]*Ads\.txt
Tags: advertising
Reference: https://iabtechlab.com/ads-txt/ads-txt-aggregator/
Added: 2026/05/03
Instances: 1 known sample(s)

Sample User-Agent strings

IABTechLab Ads.txt Crawler

Block this crawler

robots.txt — disallow IABTechLabAds.txt:

User-agent: IABTechLabAds.txt Disallow: /

Apache .htaccess — return 403:

RewriteEngine On RewriteCond %{HTTP_USER_AGENT} IABTechLab[^/]*Ads\.txt [NC] RewriteRule .* - [F,L]

Nginx — return 403 inside a server block:

if ($http_user_agent ~* "IABTechLab[^/]*Ads\\.txt") { return 403; }

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