What information is provided with a cat microchip?

It's just the number. Once the number is searched within the microchip database, the only information retrieved will be what you provided. This typically includes your name, address, phone number, and possibly your pet's name. For instance, you might have entered 'Fluffy' as your pet's name along with the chip information. No sensitive information beyond this is stored in the database. For example, it won't include your credit card number or social security number. The microchip is solely a means to help your cat find its way back to you.