OR Function

OR Function

Hi, I'm trying to write a function that maps ZipCodes to region numbers. However, I seem to keep getting Syntax errors. Please let me know what's going wrong with this code.

IF(
    OR(
        ${Prospective Students.Zip Code} == "12345";
        ${Prospective Students.Zip Code} == "23456";
        ${Prospective Students.Zip Code} == "34567"
    ),
    "Region 1",
    IF(
        OR(
            ${Prospective Students.Zip Code} == "45678";
            ${Prospective Students.Zip Code} == "56789";
            ${Prospective Students.Zip Code} == "67890"
        ),
        "Region 2",
        "No Matching Region"
    )
)