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Who blocks AI · #198 in the Majestic Million

robots.txt · checked 9 Nov 2026

Does iso.org block AI crawlers?

We couldn’t check iso.org: our request for iso.org/robots.txt was refused (403), most likely by bot protection, so we can’t say what it tells crawlers.

GPTBotUnknownOAI-SearchBotUnknownClaudeBotUnknownPerplexityBotUnknownGoogle-ExtendedUnknownCCBotUnknown
robots.txt
iso.org/robots.txt · our request for iso.org/robots.txt was refused (403), most likely by bot protection, so we can’t say what it tells crawlers
llms.txt
not checked
Checked
9 November 2026, as canaicrawl. We check again every week.

What do the bots actually get?

This page reads robots.txt, which states what iso.org asks of crawlers. A firewall or CDN can still refuse a bot that robots.txt allows. The live check requests the page as each bot and shows the status it gets.

Run a live check on iso.org Test a path in the robots.txt tester

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