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TipsMay 6, 2026

How to Decide Whether to Return a Call from an Unknown US Number

By Will Tucker

How to Decide Whether to Return a Call from an Unknown US Number

Receiving calls from unknown numbers can be unsettling, especially when deciding whether to return the call. In the United States, it's common for legitimate callers to use unfamiliar numbers, while scammers often hide their identities. To make informed decisions, consider the following strategies:

1. Utilize Call Screening Features

Many smartphones offer built-in call screening options that can help identify unknown callers:

  • iPhone Users: iOS 26 introduced the "Ask Reason for Calling" feature. When enabled, unknown callers are prompted to state their name and the purpose of their call before your phone rings. This allows you to assess the legitimacy of the call based on their response. (tomsguide.com)

  • Android Users: Robokiller's Call Screening feature screens unknown callers by informing them that your number is protected and asking for their name and reason for calling. If the call seems legitimate, Robokiller shares the caller’s name and reason with you, so you can decide whether to answer. (support.robokiller.com)

2. Leverage Trusted Call Blocking Apps

Installing reputable call blocking apps can provide real-time protection and caller identification:

  • Robokiller: This app blocks up to 99% of spam calls and texts using a global database of over 1.5 billion phone numbers. It also offers features like Answer Bots, which waste scammers' time by engaging them with pre-recorded messages. (robokiller.com)

  • Truecaller: Another popular app that identifies unknown callers and blocks spam calls. It maintains a large database of phone numbers to help users recognize and avoid unwanted calls.

3. Perform a Reverse Phone Lookup

If you have the caller's number, you can use reverse phone lookup services to gather information:

  • Whitepages: Provides details about the caller, including their name and location, which can help you decide whether to return the call.

  • ZLookup: A free service that searches its database and other sources to find matches for the phone number.

4. Search the Number Online

Entering the unknown number into a search engine can reveal if others have reported it as spam or associated it with a business or individual. Websites like MakeUseOf provide guidance on identifying unknown callers.

5. Contact Your Service Provider

Some carriers offer services to identify or block unknown callers. For example, Verizon's Call Filter and AT&T's Call Protect can help screen calls and provide information about the caller.

6. Trust Your Instincts

If the call is from a number you don't recognize and you have no reason to believe it's important, it's often best to let it go to voicemail. Legitimate callers will usually leave a message.

By implementing these strategies, you can make informed decisions about returning calls from unknown numbers, reducing the risk of falling victim to scams.

Highlights:

  • I haven't answered a scam call in months - this hidden iPhone feature is why, Published on Wednesday, March 18

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