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How to Block a Phone Number

Whether you are avoiding a telemarketer or an ex you can block a phone number with these steps.


  • Step 1: Register your phone number Register your landline and cell phone number online with the National Do Not Call Registry.
  • TIP: Telemarketing calls will stop approximately 31 days after registering.
  • Step 2: Sign up Sign up for a call-blocking service that meets your needs through your landline service provider. Call your provider for more information on their available call blocking services.
  • Step 3: Block cell phone calls Blocking unwanted calls from your cell phone depends on the particular phone and service you use. Check your owner's manual for filtering options.
  • Step 4: Review state laws Research your state's laws. Help may be offered for cell phone users depending on your states phone harassment or cyber stalking laws.
  • Step 5: Get caller ID Get caller ID to know who is calling. You can choose to either answer or ignore the call.
  • Step 6: Block your number Block your own phone number from being seen by the receiver by dialing star-67 before dialing the number.
  • FACT: Telemarketers who call a consumer registered on the National Do Not Call Registry can be fined up to $11,000 per incident.

You Will Need

  • Internet access
  • Phone
  • Call-blocking service
  • Cell phone's owner's manual
  • Knowledge about state laws
  • Caller ID

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