What Happens When a Cell Number Is Blocked?by Kristen Hamlin
Blocking certain phone numbers is sometimes necessary for privacy, security or other reasons. You might want to block a number from calling you, block your number from appearing on others' caller ID, or block calls from being made to a number.
How to Block a Number
The procedure for blocking a phone number from your cell phone varies by carrier. Some allow you to block numbers by contacting customer service or using online account management. Some carriers require a subscription to a service that allows you to block numbers.
When a Number is Blocked
If someone has blocked your number, calls to them will not go through. Depending on the recipient's cell phone carrier, you'll hear a message indicating that the customer has blocked you, or simply that the call cannot be completed. If outgoing calls to a number have been blocked, you will not be able to complete the call.
Caller ID Blocking
If you opt to [restrict your number](https://itstillworks.com/restrict-number-6951652.html) from being seen on caller ID any time you make a call, your number will show up as "Restricted" or "Unknown" on the call recipient's phone. The procedure and charge for this service varies by carrier.