Your social security number (SSN) is actually made up of three different numbers: the 3-digit area number, 2-digit group number, and 4-digit serial number. This is the way its been done since social security numbers first started being assigned back in 1936. But later this month the Social Security Administration (SSA) is going to begin assigning numbers randomly. This will make additional numbers available that are currently restricted due to the area number. Basically, it will take longer for the SSA to run out of numbers. Also, the randomization method of SSN assignment is supposed to better protect the integrity of the numbers. Bad guys won’t be able to figure out the first 3 digits based on state. Even after this change, the SSA will still not be using 000, 666, or 900-999.