One of the advantages for employees in a group health plan is the contribution most employers make toward the cost of the health coverage premium â in many cases, employers pay one-half or more of the monthly premium for an employee.
The basic format consists of five decimal numerical digits. An extended ZIP+4 code, introduced in 1983, includes the five digits of the ZIP code, a hyphen, and four additional digits that determine a more specific location within a given ZIP code. The USPS provides a free online lookup tool for ZIP codes.
What are those last four numbers in a nine-digit ZIP Code? People call and ask for the Full ZIP Code, the Last 4 Digits of their ZIP Code, the 9 Digit ZIP Code, the numbers after a ZIP Code, the 4 digit extension and so on. Even though they all mean the same thing,The U.S. Postal Service refers to these numbers as the ZIP +4 Code.