How do you find out what your keys belong to?

To find out what your keys belong to, you can start by examining any tags or labels attached to the keychain. If there are no identifiers, try inserting the keys into locks or devices they might correspond to, such as doors or storage units. You can also check with family members or roommates to see if they recognize the keys. Lastly, consider taking clear photos of the keys and sharing them online or with local community groups for assistance.