An unknown number called you? No problem: discover his identity with a simple trick

How to Identify Hidden and Unknown Numbers on Your Phone

The phone rings, and your screen lights up with a number you don’t recognize. Do you answer, ignore, or block it? This situation is increasingly common, and while many people choose not to pick up, curiosity often kicks in: Who is calling me?

The good news is that you don’t have to stay in the dark. There are simple methods to identify unknown or hidden numbers, reduce unwanted calls, and regain control of your phone and your privacy.

Hidden vs. Unknown Numbers: What’s the Difference?

Before you can protect yourself, it helps to understand the terminology:

• Unknown number:
  The caller’s number is visible, but you don’t recognize it because it’s not saved in your contacts.

• Hidden number (private / blocked number):
  The caller deliberately conceals their number so it doesn’t appear on your screen. You might see “Private number,” “Blocked,” or “Unknown caller,” depending on your device and carrier.

Unknown calls can be annoying; hidden calls can feel more intrusive, especially if they are frequent or harassing. Knowing which type you’re dealing with will help you choose the right solution.

How to Identify an Unknown Number

When a number is visible but unfamiliar, you have several ways to find out who it belongs to.

1. Use Google to Search the Phone Number

Google’s massive index makes it one of the simplest tools for identifying unknown callers.

Try these variations when you search the number:

• With spaces (e.g., +1 555 123 4567)
• With country code and no spaces (e.g., +15551234567)
• Without country code, if it’s a local number
• With or without punctuation (dashes, parentheses)

These searches may lead you to:

• Online business directories
• Reverse phone lookup pages
• Social media profiles where users have shared their number
• Forums where others report spam or scam calls

If the number belongs to a company, service, or widely reported spammer, there’s a good chance you’ll find something.

2. Use Community-Based Lookup Services (e.g., Tellows)

If Google doesn’t give you clear results, specialized platforms can help. One popular option is Tellows.

• What is Tellows?
  A website and app where users from more than 50 countries report suspicious, spam, or harassing calls. Over 8 million people use it every month, which helps keep its database current.

• How it works:

  1. Go to the Tellows website or open the app.
  2. Enter the unknown number into the search bar.
  3. Review the information provided, which may include:
     • Caller name or company
     • Type of caller (telemarketer, scammer, survey, business, etc.)
     • Country or region
     • User comments and risk ratings

• Availability:
  Tellows is available as an app on both Android and iOS, making it a quick way to check numbers directly from your smartphone.

Using services like Tellows helps you decide whether to return the call, block the number, or ignore it.

How to Unmask Hidden or Private Numbers

Identifying an unknown number is one thing; revealing a hidden (private) number is another challenge. Some apps specialize in this.

Use an App Like Whooming

Whooming is an app designed specifically to deal with anonymous and hidden number calls.

• What it does:

  • Blocks or manages anonymous calls
  • Reveals the real phone number behind private or hidden calls
  • Works regardless of your phone model or mobile operator (subject to regional compatibility)

• How to use Whooming:

  1. Download the Whooming app from Google Play or the App Store.
  2. Register and follow the setup instructions.
  3. When you receive a call from a hidden or anonymous number, reject the call.
  4. After a few seconds, open the Whooming app: the real number of the caller should appear in your Whooming call log.

This method is particularly useful if you are dealing with persistent anonymous calls or possible harassment and need to identify who is behind them.

How to Hide Your Own Number When Calling

Sometimes, you may want to stay anonymous when making a call—for example, when contacting a stranger from an online ad or calling a business you don’t fully trust.

One commonly used method is to dial a prefix before the number:

• Dial #31# followed by the phone number you want to call.

For example:
#31# + country code + phone number

This usually hides your number for that specific call, so the person you are calling will see something like “Private number” or “Unknown caller.”

Important notes:

• This feature may not work in all countries or with all carriers.
• Some regions use a different code to block caller ID.
• Emergency numbers and certain services may still see your number, even if you hide it.

If you plan to use this regularly, check with your mobile carrier for the correct code and conditions in your country.

Take Back Control of Your Phone and Your Privacy

Unknown and hidden calls don’t have to dominate your day or your peace of mind. By:

• Understanding the difference between unknown and hidden numbers
• Using Google and community-based tools like Tellows to identify visible numbers
• Using apps like Whooming to reveal private callers
• Knowing how to hide your own number when necessary

you can significantly reduce stress, avoid unpleasant surprises, and protect your privacy more effectively.

Your phone is a tool for your convenience—not a source of anxiety. With these methods, you can decide who is allowed to reach you and when, instead of letting anonymous callers dictate the rules.