A phone service that displays a caller's phone number and often their name before the call is answered.

Things you need to know

This requires a device where that information can be displayed. Often the phone itself has that capability. Otherwise a separate box can be purchased.

Also known as

Calling Line Identification (CLID), Calling Number Delivery (CND), Calling Number Identification (CNID) or Calling Line Identification Presentation (CLIP)

Cost Considerations

Caller ID on a landline has an initial startup fee and a monthly payment of $3 to $10. Caller ID is provided automatically to cell phones at no additional cost.

Costs vary greatly by region (and even by zip code). To get free estimates from local contractors, please indicate yours.