Mar 18, 2008 · what do the 15#s on the drivers license mean? ... If NJ licenses are still the same as they used to be, the first digit is the first letter of your last name. The ... The driver's license number is the same as the person's Tax ID number. El Salvador licenses (as well as vehicle circulation cards) contain a chip which can be read by putting the card in a chip reader. There are several categories of drivers' licenses in El Salvador: How to calculate the North America (US) Drivers License Number Algorithm from Posterization, Inc. Contact: [email protected] Here is an algorithm based on the Soundex code that you can use to calculate the US drivers license number of individuals for the states of Florida, Illinois, and Wisconsin . You can get you license at 16 but it wont be a full license. For the mean time you will have a junior drivers license that will let you drive from 5am to 9pm.