AI SearchGoogle

Google-Extended: IP ranges, verification & how to handle it

Last verified: 2026-06-13 · maintained by Unsourced

Google-Extended is the control Google uses for whether your content informs Gemini and its AI features. It uses Googlebot's infrastructure; opting out here doesn't affect normal Search indexing.

Verified IP ranges & identity

Google-Extended publishes the IP ranges it crawls from, from the operator's published feed. A request claiming to be Google-Extended from an IP outside these ranges is suspect:

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How to verify a request is really Google-Extended

A User-Agent string is just a claim — anyone can send Google-Extended in a header. Confirm identity two ways: forward-confirmed reverse DNS (the IP resolves to Google, and that host resolves back to the IP), and, where published, an IP inside the operator's official ranges. If neither holds, it's an impostor wearing the badge — not Google-Extended.

Should you allow or block Google-Extended?

Recommended: bait. Cites and links to sources and can send you referral traffic — you want this crawler.

If you do choose to act in robots.txt (which crawlers honour but don't enforce):

# Google-Extended: recommended to ALLOW — blocking can cost you AI visibility
User-agent: Google-Extended
Disallow:

Official sources

Published IP feed: https://developers.google.com/static/crawling/ipranges/common-crawlers.json
Google crawler info: https://developers.google.com/search/docs/crawling-indexing/overview-google-crawlers ↗

Common questions about Google-Extended

Is Google-Extended really from Google?

Google-Extended is Google's crawler, but a User-Agent header can be spoofed, so the claim alone isn't proof. Confirm it with forward-confirmed reverse DNS and, where published, a match against Google's official IP ranges.

What are Google-Extended's IP ranges?

Google publishes the IP ranges Google-Extended crawls from, via the operator's live published feed. This page lists the current 585. A request claiming to be Google-Extended from an IP outside those ranges is suspect.

Should I block Google-Extended?

Our recommendation: bait. Cites and links to sources and can send you referral traffic — you want this crawler.

Related crawlers

Is Google-Extended — or an impostor — actually hitting your site?

Unsourced verifies every AI crawler against published ranges and reverse DNS, and shows which AI assistants cite you.

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