*67: Blocks caller id on one outgoing call
From PhonePower Knowledge Base
*67 - Blocks caller ID on a single call
This feature will block your caller ID for a single outbound call.
To use:
Pick up the Phone Power phone.
Once you hear a dial tone, dial *67 + the number you want to dial.
For example:
*67 818 555 1212 would dial 818-555-1212
The called party at that phone number destination would receive: "Restricted" or "Private"
The caller ID will not display your name and phone number on their caller ID for one call.