How Do Scammers Get Your Cellphone Number and How to Protect Yourself

Alexa Lemzy March 15, 2022
An elder lady got a suspecious phone call and looks a credit card in her hand

Scammers get your phone number and use highly sophisticated methods to con you of money and sensitive information.

The number of scam calls has been steadily rising across the world.

For instance, the number of scam calls targeting Americans rose by 118% in 2021 compared to 2020.

Similarly, a recent survey revealed that 4 out of 10 adults in the UK received a suspicious call during the year 2021.

The same survey shows that 2% of these targets fell into the scammers’ traps and followed their instructions.

Along with scam calls, scammers get your phone number for other purposes, such as taking over your bank account and committing identity fraud.

This article will tell you how these fraudsters get your phone number and how you can protect yourself.

How do scammers get your cellphone number?

From filling out online forms to logging in to your bank account, you use your phone number to confirm your identity.

Just like your email address, your phone number is among the most common form of personal information you use in everyday life.

Scammers get your phone number exactly for this reason, and they illegally get your number via the following methods.

Dark web

Fraudsters buy phone numbers in bulk on the dark web. For example, phone numbers of four million Clubhouse users were up for sale as a dataset on the dark web.

Buying millions of phone numbers on the dark web does not cost scammers much.

For instance, the price for basic personal details of an American, including his phone number, is just $8.

Number generator

Another common method scammers use is the auto-dialer. This equipment generates and calls random phone numbers.

Social media, web search, and directories on the web

Phone numbers are spread across many social media platforms, websites, and phone directories around the Internet. To glean phone numbers from the web, fraudsters use various techniques, such as web-scraping.

What can scammers do with your phone number

Scammers illegally get and use phone numbers for a variety of malicious purposes:

Scam calls

This is the most prevalent reason scammers are after your phone number. Scammers get your phone number and then make scam calls to con you of money, financial and other sensitive information.

Scammers commonly impersonate well-known banks, insurance providers, government institutions, or mega-retailers to trick you.

For example, HMRC revealed that people in the UK received approximately 600,000 calls from scammers impersonating HMRC in 2021. In some of these calls, scammers asked for sensitive financial information and also convinced individuals to make payments by offering them tax rebates and by threatening them with imminent penalties because of unpaid taxes.

Scammers can use your phone number to steal your accounts

You often use your phone number to log into apps such as banking apps on your mobile phone, and a text to your number can be a multifactor authentication method.

However, some of these SMS systems are not end-to-end encrypted and can be easily hacked. If the scammers get your phone number, they can redirect this text message to their number and gain access to your apps and/or bank accounts.

Take over social media account

Fraudsters can also use your phone number to take over your social media accounts.

This theft begins with scammers getting your phone number. Then, they assign your number to a new SIM card. This enables them to disconnect your number from your mobile while keeping control over your phone number. This method is called SIM swapping.

Using this method, scammers can change your passwords and take over your social media accounts by impersonating you.

One prominent victim is former Twitter CEO Jack Dorsey. Hackers took over his Twitter account and posted tweets.

What do scammers get out of scam calls?

In most cases, scammers aim to get one of the following:

To get the individual to make payment


The primary goal of scammers is to con you out of money. Scammers impersonate banks, insurance companies, telecom companies, or government entities and trick you into making payments.

For example, they can pretend to be a pension provider and tell you that they will release your pension funds early if you pay them a certain amount.

Access to sensitive information

Scammers may pretend to be your bank, insurance provider, or a government agency to ask for sensitive information, like your health data and financial details. Then they sell this data to third parties for a profit.

Access to user’s digital device and/or online accounts

Scammers can also pretend to be the IT help-desk for a well-known brand and ask to gain access to your device remotely to protect you from imminent danger.

For instance, they may ask you to download an antivirus software program against an imminent threat. This program can allow them to access all data on your device.

How to know if it is a scam call

Scam calls are common and increasingly sophisticated. Use the following tips if you feel you are being scammed:

First, you should be cautious when you receive an unsolicited call. Government agencies, such as HMRC, big retail, tech, or airline companies, are highly unlikely to make unsolicited calls to you. Scammers impersonate people working for these institutions to incite fear and/or urgency in you and con money or personal information from you.

The first method frequently used is to call you and then hang up the phone. After this, they wait for you to call them back and when you do, you face an expensive bill.

Another factor to think about is robocalls. Robocalls are pre-recorded messages delivered to millions of people like you every day, to sell you something. If you receive a cold call, you should be suspicious.

Remember that honest businesses, banks, or governments won’t ask for your financial information or your passwords over the phone.

You should also beware of calls where the caller poses as your bank and asks you to log into your bank account. They do this to learn your account pins and then steal your account.

Last, if the caller has poor English, you are more likely at risk of being scammed because a significant number of these calls are made from abroad.

How to protect yourself against scammers

Do not give away your phone number to non-trustworthy websites and platforms

Each scam begins with your phone number falling into the wrong hands, and if you can avoid sharing your number on insecure websites, you can significantly minimize risks.

For example, if a website does not provide a secure connection, or it does not have a detailed privacy policy, you are better off not disclosing your number.

Another sign of an untrustworthy website is any unusual characteristic of the URL. For example, if you visit your insurance provider’s website, but the name is not correct, or you do not see the HTTPS header, it means your connection is not secure.

Another practical tip to staying safe while browsing the web is to confirm that the website has a valid SSL/TLS certificate. You can check this by clicking on the padlock icon next to the address bar.

Hang up the mobilephone if it feels like a scam

Many cyber security specialists recommend it is best just to hang up the phone and not say anything if there is a suspicion of a scam.

Use a call blocker

Whether it is a landline or mobile phone, you can use a call blocker to prevent scammers from reaching out to you.

On your phone’s app store, you can find call blockers. Call blockers can help you directly stop calls identified as scams or make them ring silently.

Take action and report fraud

You can report scam calls you receive on this platform so that other people will be warned about potential dangers.


While scam calls are on the rise overall, you can protect yourself from falling prey to fraudsters by being more attentive when you receive unsolicited calls.

When you get calls from unknown numbers, you should not reveal any personal information, such as passwords, health information, or login details.

If you suspect you are dealing with a scam call, it is best to hang up the phone and double-check if the organization making the call has that number as its contact number on its website.

Alexa Lemzy


Customer support person. Interested in customer success, growth, marketing and technology. Passionate about content, reading and travel.

You'll Probably Also Like:

Construction workers at building
Text Messaging Software for Construction Companies Can Streamline Your Project
Alexa LemzyFebruary 17, 2020

Communication and organization can be major obstacles to the smooth running of construction projects. Text messaging software allows project teams communicate with and organize their workers easier, which…

Read more
small business mobile marketing - woman on mobile phone
7 Mobile Marketing Best Practices for Small Businesses
Juan Pablo CastroJune 26, 2022

Mobile marketing is by far the best strategy you could use to grow your business because it instantly reaches the audience you’re targeting, on any device. The following…

Read more

Try our fully featured business texting platform today