How to recover my old Apple id?

If you don't know the ID, see if you can recover the ID/password.

Apple ID - How to find your Apple    An iCloud e-mail address is an Apple ID.

Apple ID - Find              

Enter the Apple (iCloud) ID and click Forgot Password.

Apple ID - Manage            

Apple ID – Forgot Password            

You didn't forget your Apple ID, right? Maybe you mean you need to recover the related password. If so, then

use If you forgot your Apple ID password https://support.apple.com/en-us/HT201487.

Post back if that is not what you mean.

See the article https://support.apple.com/en-in/HT204921

Only apple support advisors can recover you Apple ID before 30 days contact them only see a link https://support.apple.com/en-in/HT201232

This is user to user forum never post your Apple ID here .