A phone number can only ever be used for phone verification up to 3 times.

This means if you have 3 OpenAI accounts you can use the same number for all three when completing phone verification on each initial API key generation across those three accounts.

For anti-fraud and abuse reasons, we do not allow you to unlink phone numbers from OpenAI accounts to free up that number for reuse. This means deleting an OpenAI account does not free up the number to get around the limit. There is no workaround.

Unfortunately, we do not provide any exceptions to this rule. We recommend trying to use another phone number or accessing a previous account associated with your phone number.