Your National REALTOR® Database System ID, or NRDS, is a 9 digit number that is given by the National Association of REALTORS®, through the local Primary board, to each of its members. That number is needed to distinguish you from other agents and also helps in giving proper placement and discounts when used in for registration for classes, events and conventions.
That number will follow the member even if they relocate and join another association. Much like a social security number for REALTORS®.
If you need to locate your number you can find it on the back of the REALTOR® Magazine or by clicking here https://reg.realtor.org/roreg.nsf/retrieveID?OpenForm