Tools to find the carrier of a cell phone number are available on FreeCarrierLookup.com and CarrierLookup.com, as of 2015. Both websites allow visitors to find carrier information for free.
To find the carrier of a cell phone number on FreeCarrierLookup.com, enter the cell phone number with its area code in the search bar, and then click Search. The name of the carrier appears on the next page. The website finds carrier information for numbers in the United States and Canada.
To find a cell phone number's carrier on CarrierLookup.com, enter the 10-digit phone number and then click Lookup Carrier Now. Carrier information appears in a new window.