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Pinpoint a specific central post office or sectional center facility.

Adding those extra four digits narrows your location down to a specific street block, apartment building, or high-volume business. It makes your delivery much faster and more accurate! SOS zip

Forgotten a full address? You can find any official 9-digit code using the USPS ZIP Code Lookup Tool . Pinpoint a specific central post office or sectional

Narrow it down to the local post office or delivery area. 💡 Pro-Tips for Master Mailers: SOS zip

It is not just a random string of numbers! "ZIP" stands for . The U.S. Postal Service introduced it in 1963 to help manage the massive boom in mail after World War II.