Seeing "Private Number" or "Number Withheld" flash up on your phone can be confusing, whether you're the one hiding your number or the one receiving the call. This guide covers both sides: how to make a private call yourself, and what it means when someone calls you from a private number.
A private number call is one where the caller's phone number is deliberately hidden from the person they're calling. Instead of seeing a phone number on their screen, the recipient sees "Private Number", "Number Withheld", or "Unknown" on their caller ID.
This can happen in two ways: the caller has actively chosen to hide their number for that call, or their line is permanently set to withhold caller ID.
To hide your number for a single call, dial 141 before the full number, including the area code. This applies whether you're calling from a mobile or a landline number.
Example: to call 020 1234 5678 without showing your number, dial: 141 then 02012345678
The person you're calling will see "Number Withheld" or "Private Number" instead of your phone number.
If you want your number withheld permanently, rather than dialling 141 each time, you can set this up through your network or phone provider. Once permanent withholding is active, dial 1470 before a number if you want your number to show for one specific call.
There are several common reasons people choose private number calling:
If you run a business or work from your personal mobile, dialling out with your private number showing can mean clients calling you back on a line you'd rather keep separate from work. A business phone system lets you make and receive calls under one business number, so you never need to hide your personal number manually or worry about clients saving your private mobile number in their contacts.
An alternative is a virtual phone number, which works entirely through an app on your existing mobile. You keep your own device, but every call goes out and comes in under your business number instead of your personal one, so there's nothing to hide or withhold manually.
Not every private number call is someone deliberately hiding their identity. Common sources of calls from a withheld number include:
If a private number call disconnects the moment you answer, it's very likely an automated system checking whether your line is active, rather than a genuine caller.
If you keep getting private calls you don't want:
If your own number isn't hiding when you expect it to:
Yes. Some organisations don't accept calls from withheld numbers, for security reasons. This commonly includes:
If you regularly need to reach these types of numbers, you'll need to show your number for that call, even if you normally keep it hidden.
Yes, 141 works on UK landlines and mobiles to withhold your number for a single call.
No. If your number is withheld, they won't be able to see or return the call using their caller ID.
No. Your number will still appear on your own phone bill and call records, even when it's hidden from the person you called.
This depends on your provider's settings. With a dedicated business landline number for your mobile, you typically won't need to hide your personal number at all, since calls already go out under your business line.
Yes. Most providers, including Rinkel, let you port your existing number across, so you don't lose the number your contacts already have saved.
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