How many phone numbers can an area code handle?
well since there are 7 digits in a telephone number (aside from the area code) then the technical limit of phone numbers in a given area code would be 000-0000 thru 999-9999 so that would be 10,000,000 but you need to remove all numbers that begin with 0 and 1 so in reality valid phone numbers must fall between 200-0000 and 999-9999 removing 2,000,000 possible phone numbers, then you need to remove all of the N11 codes (211, 311, 411, 511, 611, 711, 811, 911) 10,000,000 – potential numbers -2,000,000 – invalid numbers starting with 0 or 1 -8 – N11 codes ————— 7,999,992 – potentially possible numbers this is only the mathematical limit of the number of phone numbers that can exist within a given area code other factors such as reserved or test exchanges and numbers will reduce this number even further..
