Google · AI answers

Google-Agent

Identify Google-Agent by its user agent. Check request identity, review robots.txt controls and track visits in Aiola Analytics.

Download AiolaAI crawler directory

Key facts

User-agent token: Google-Agent
AI answers: Fetched to answer a user's question now.
Google publishes official IP ranges; verify requests against them.

What Google-Agent is

Google-Agent navigates and acts on the web at a user's request. Google publishes its IP ranges in user-triggered-agents.json.

In Aiola's taxonomy, AI answers means fetched to answer a user's question now.

Google-Agent user agent

Look for the match token inside the complete HTTP User-Agent header. Tokens can be spoofed, so use the network checks below for authentication.

Example User-Agent (unverified)
Google-Agent
Case-insensitive match token
Google-Agent

Official IP ranges

Google publishes an official IP range list. This cached snapshot contains 20 CIDR prefixes, last fetched 2026-10-23. Open the live source

Official IP range snapshot
136.121.16.0/24
136.121.24.0/21
136.121.40.0/21
136.122.0.0/16
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
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

Verify a Google-Agent request

For Google-Agent, compare the source IP from your trusted edge or server against Google’s current published prefixes.

Test one CIDR in Python (replace REQUEST_IP)
python3 -c 'import ipaddress; print(ipaddress.ip_address("REQUEST_IP") in ipaddress.ip_network("136.121.16.0/24"))'

Test every current prefix in the vendor feed and re-fetch it regularly. This cached snapshot is evidence of publication, not a permanent firewall list.

Control Google-Agent with robots.txt

Google-Agent is user-triggered. Google's controls may differ from automated crawling, so do not assume a robots.txt block is an authentication boundary.

Allow Google-Agent
User-agent: Google-Agent
Allow: /
Block Google-Agent
User-agent: Google-Agent
Disallow: /

Read official crawler documentation

Aiola Analytics

See every Google-Agent visit on your site

Aiola tracks 70 AI, search and link-preview crawlers next to your human traffic. See when Google-Agent arrives, which pages it requests and how that changes over time. Hosted Analytics needs Pro or a trial.

Download AiolaSet up bot tracking
Aiola Analytics showing AI crawler visits by bot and page

Common questions

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