How to Block Outgoing Long Distance Calls

By James Clark

It can be a shock to receive a phone bill with long-distance charges that you didn't make. Whether the calls were made by chatty teenagers or dishonest roommates, there are ways to block your telephone number from being used to place long-distance calls. Land-line phone services typically charge a monthly fee to block outgoing long-distance calls, but the fee might be far less than the cost of the calls themselves and the hassle of trying to determine who made the calls. Cell phones often come with a blocking feature that requires the owner to enter a four-digit code that locks the phone.

Step 1

Check with your phone company about a dial lock feature. You can subscribe over the phone and pay a monthly fee to receive a special code that allows only authorized users to place long-distance calls.

Step 2

Enter the dial lock security code on the keypad and follow the voice prompts.

Step 3

Dial the long-distance number as you would normally.

Step 4

Lock a cellphone from placing long-distance calls by scrolling from the main menu to Settings>Security>Lock Code.

Step 5

Enter your lock code, which by default is typically the last four digits of either your cell phone number or Social Security number.

Step 6

Change your lock code to a different four-digit number than the last numbers of your cell phone to prevent someone from easily hacking your phone.

Step 7

Try contesting phone-bill charges that you know you did not make and should not be responsible for paying. Telephone companies will often forgive and erase one-time charges for reliable customers who are up-to-date on their bill.