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.
This type of code is sometimes referred to as a ZIP+4 code. These codes are written with the first five digits, followed by a hyphen, followed by the additional four digits. These last four numbers narrow a location down even more, and many times they represent a specific block or street.