How does Claude Code attempt to block users from unsupported regions?

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Claude Code employs specific checks to identify and block users from unsupported regions.

Claude Code incorporates mechanisms designed to detect and prevent access from regions it does not support. These measures involve scrutinizing a user's device settings and the network pathways through which requests are made. Anthropic states these functionalities are standard procedures for identifying fraudulent activity and preventing misuse of their services.
Timezone Verification

The AI agent verifies the timezone settings of the device making a request. This check is part of a broader strategy to ascertain the user's geographical location and determine if it aligns with supported regions.
Domain and Proxy Scrutiny

Claude Code also examines whether a request is being routed through a domain associated with an unsupported region or an entity flagged as problematic. This includes checking for connections via known proxy services that might be used to circumvent geographical restrictions.
Anti-Abuse Framework

Anthropic describes these detection methods as integral to their anti-abuse measures. The company states the primary objectives are to detect and prevent fraud, stop account abuse by unauthorized resellers, and protect against the unauthorized replication of their AI models through a process known as distillation.
Remediation and Rollback

Following reports and concerns raised by entities like China's National Vulnerability Database, Anthropic indicated plans to roll back these specific experimental features. An engineer noted that stronger mitigations were implemented and the feature was intended to be removed.

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How does Claude Code attempt to block users from unsupported regions?

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