1. Answer the Call: If you feel comfortable, answer the call and ask the person on the other end to identify themselves. This is the simplest way to find out who is calling. 2. Check Voicemail: If you missed the call or chose not to answer, check your voicemail. The caller may leave a message that provides information about their identity and the reason for their call. 3. Use a Reverse Phone Lookup Service: There are various online reverse phone lookup services that can help you identify the caller based on their phone number. These services often provide information about the owner of the number, their location, and whether the number has been reported as spam.