Use all capital letters and avoid punctuation like periods or commas.
Pinpoint specific post offices or delivery zones within that region. USPS.zip
Indicate regional areas or a Sectional Center Facility (SCF) , which acts as a central sorting hub. Use all capital letters and avoid punctuation like
Represents a broad geographic area of the country (e.g., "0" for the Northeast, "9" for the West Coast). "0" for the Northeast
Use the USPS ZIP Code Lookup tool to verify the correct 5-digit or ZIP+4 code for any address.