If you want to use one-time-blocking option, you are just required to dial *67 ahead of the area code and phone number. Eventually, the person on the receiving end will find your identity either as ‘Restricted’ or ‘Private Number’.
Including Verizon, many networks use this universal command for one-call caller ID blocking. However, your network may have an entirely different code for this service. *67 certainly works in North America.
Among the codes for other countries are:
- Albania, Australia, Greece, Israel, Italy, Sweden: #31#
- Argentina, Denmark, Iceland, Switzerland, South Africa: *31*
- Germany: *31# or #31#
- Hong Kong: 133
- Japan: 184
- UK and Ireland: 141
- New Zealand: 0197 (Telecom) or *67 (Vodafone)
There is a possibility that your network does not support such code. This feature works for only one call, which means that you are required to dial the code before every call.
In order to hide your caller ID permanently, you need to contact your service provider. They will allot you a permanent Private Number and charge some money in return. As a result, nobody will be able to see your caller ID, even if your number is saved in their contact list.
If you are using permanent caller ID blocking feature, you can deactivate it for one specific call. For this, you just need to add *82 before the phone number. You phone carrier, however, may not support this code.