You can visit Apple's official warranty check page to check the Apple warranty status for a device. Here are the steps:

1. Go to the Apple warranty check page.
2. Enter the serial number.
3. Follow the on-screen instructions to view your device's warranty status and coverage details.

You can also find information about your AppleCare plan or Apple's Limited Warranty by logging into My Support with your Apple ID and selecting your device.

For more details, refer to Apple's support page on warranty and AppleCare.