Per Call Blocking Per Call Blocking prevents, on a per-call basis, your name and phone number from appearing on another person's display unit when you make a call.
When Per Call Blocking is ON, your call is identified as "Private" or "P" on a display unit. When you hang up, Per Call Blocking is automatically turned OFF.
When you make your next call, your name and phone number is once again displayed on a display unit unless you turn Per Call Blocking ON again.
Calls to 911, toll-free (800 or 877) and 900 services cannot be blocked. Calls to some wireless customers may not be blocked.
Calls made with Per Call Blocking activated to numbers equipped with Anonymous Call Block will not be completed.
All calling features are subject to availability and compatibility restrictions.
Instructions for FiOS Digital Voice Calling Features