Can i check apple earphones warranty?

The headphones that came with your phone are covered under the same warranty as the phone.

If you bought them separately, you can check the warranty for AirPods at that site as well.

If you purchased wired headphones separately, look at the receipt. they are covered by a one year warranty.

Enter the serial number here: https://checkcoverage.apple.com

No.

No.

One year, as I already told you above.