How Many Different Cell Phone Numbers Are There in the World?

That is a good question? I am not sure anyone really knows the answer to this question. To answer this question correctly you would have to go to every cell phone carrier (ex. Verizon, T-Mobile, Sprint, etc.) in the World and sum up all of the ACTIVE cell phone numbers in there system. You would have to sum up all the number of mobile phone numbers not the number of active customers because some customers have more than one cell phone number (1 cell phone for work and 1 for personal use). This obviously would be a daunting task and may be unachievable since the cell phone carriers more than likely would not give this information out to the public.

This question obviously is not very important but it would be very interesting to know the total number of cell phone numbers that exist in the world. Since we do not have the information from all of the cell phone carriers we can not accurately calculate the number of mobile phone numbers in the world. However, using some simple mathematics and combinations we could calculate the max number of cell phone numbers that could ever be used (using the standard 111-111-1111 format). A phone number in this format consists of three parts: the exchange, the area code, and the last four. We can calculate the total number of cell phone numbers using this format using combinations. If we include the number 000-000-0000 then the total number of phone numbers would be 10*10*10*10*10*10*10*10*10*10 (or 10 to the 10 power) which would equal 10,000,000,000. So, there are 10 million different phone number combinations (this includes duplicates).