PhoneHub

Second Numbers & Privacy

How scammers get your phone number, and how to make it harder

Your number leaks from more places than you think. Here is where it actually comes from and what you can realistically do about it.

Nobody hands their number to a scammer. It arrives there anyway, usually through a route the owner never thought about.

Where it actually comes from

Data breaches are the biggest single source. When a company you dealt with years ago is breached, your number is in the file, and those files circulate indefinitely.

Public listings are the second. A number on a marketplace advert, a business directory or an old website is scraped within hours of appearing.

Then there is the boring one: you typed it into a form. Competitions, free downloads, loyalty schemes and anything with a privacy policy nobody reads.

What actually helps

Stop giving out the number attached to your bank. That single habit does more than every blocking app combined.

Use a second number for anything public. Listings, forms, deliveries, anything a stranger needs.

Do not confirm you exist. Pressing a key to be removed from a list tells the caller the number reaches a real person.

What does not help much

Blocking individual numbers. Spam callers rotate numbers faster than you can block them.

Asking to be removed. A scammer is not running a mailing list.

The short version

You cannot un-leak a number. You can decide which number does the leaking.

PhoneHub

Written and fact-checked by the PhoneHub editorial team. PhoneHub is published by AffinityClick, the company behind Hushed and aloSIM — so the people writing this build phone numbers and eSIM for a living.

More in Second Numbers & Privacy

All →