AI bots

Google-Agent: what it is, its IP ranges, and how to block it

Google-Agent is Google's crawler for AI search and answers.

Vendor	Google
What it is for	AI search and answers
In its User-Agent	`Google-Agent`
Its vendor's address list	`https://developers.google.com/static/crawling/ipranges/user-triggered-agents.json`
IP ranges	20

It reads a page for an AI's search or for a person who asked an assistant, and can bring visitors. Bot Protection lets it through by default; you can block it.

How to verify it

Any bot can write Google-Agent in its User-Agent. A request is Google-Agent only when its address is in Google's published list below: check the address, not the name.

Check an address

How to block it

With robots.txt, you ask it to stay out:

User-agent: Google-Agent
Disallow: /

robots.txt is a request, not a block, and it cannot tell the real crawler from a bot wearing its name. Bot Protection verifies Google-Agent by its address on every request and answers it as you choose on the Set-up page, per kind or for Google-Agent alone; a bot that only wears the name is judged like any other bot.

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Its IP ranges

From Google's own list, downloaded again every day.

IPv4

136.121.16.0/24
136.121.24.0/21
136.121.40.0/21
136.122.0.0/16
74.125.232.0/28
74.125.232.112/28
74.125.232.16/28
74.125.232.32/28
74.125.232.48/28
74.125.232.64/28
74.125.232.80/28
74.125.232.96/28

IPv6

2001:4860:c::/124
2001:4860:c::10/124
2001:4860:c::20/124
2001:4860:c::30/124
2001:4860:c::40/124
2001:4860:c::50/124
2001:4860:c::60/124
2001:4860:c::70/124