Comparing a table of standardized, verified addresses allows you to identify duplicates, delete redundancies or merge records easily. Clean, standard addresses are easy to sort and compare. So, you get much more than a pretty 9-digit ZIP Code you get a clean, standard address. Cleaner Address Data - Addresses must be validated, standardized, and corrected before you get the ZIP+4 Code.By adding ZIP+4 Codes, Delivery Point Barcodes, and sorting/bundling your mail, you can get discounts up to 5% to nearly 60% off the prices you'd pay at the post office. Save Money with Bulk Mailings - If you send at least 50 packages or more than 200-500 pieces of mail, you may be able to qualify for commercial mailing discounts.Mail delivery is more reliable with a valid, standardized address with ZIP4 Code since the address data is clearly understood. It also means the address information is standardized to the USPS address format. Less Returned Mail - Obtaining ZIP+4 Codes requires validation that means the address is a valid delivery point.Reduce Lost Mail & Misdeliveries - More efficient routing also means fewer opportunities for mistakes along the way.Completing ZIP+4s on your mail can speed up processing and delivery, sometimes by as many as two days. That simple 9-digit number makes routing more efficient since the USPS knows which mail person will put the letter in the mailbox. Faster Shipping - Each ZIP+4 Code represents segments of delivery routes that are usually within a single block of the desired delivery point.Here are a few benefits of looking up ZIP+4 Codes/9-digit ZIP Codes as a part of your address data management or shipping processes. 4.1 - Average delivery points per ZIP+4 Code (excluding PO Boxes)įull 9 Digit ZIP Code Benefits (ZIP+4 Lookup).181,086,464 - Total USPS delivery points in the US.925 - Average number of USPS ZIP+4 Codes per 5-Digit ZIP Code.36,972,918 - Total USPS ZIP+4 Codes excluding PO Boxes (conventional ZIP+4 Codes).7,282,402 - Total USPS ZIP+4 Codes dedicated to PO Boxes (one ZIP+4 Code per PO Box).44,255,314 - Total USPS ZIP+4 Codes in the US.These are the most up-to-date stats for USPS ZIP+4 Codes, 5-digit ZIP Codes, and USPS delivery points as of this writing in September 2023: Quantity of postal employees, new construction, remapping delivery areas, etc., are just a few things that cause ZIP+4 Code changes. In fact, 5% of all addresses get their ZIP+4 Code changed each month. The +4 on a ZIP Code can change as frequently as every 30 days. Not so for the last 4 digits of Zip Code numbers. Five-digit ZIP Codes also change, but they do so infrequently it's less likely that you will live in a ZIP Code when it changes. They're not permanent lines, so a 9 digits ZIP Code can change regularly. The extra 4 digits on ZIP Codes identify segments of fluid postal delivery routes. Typically, each PO Box gets its own +4 Code, which often matches the box number.
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The USPS also assigns ZIP+4 Codes to PO Boxes. Usually, this comprises 5 to 20 homes or locations. These codes indicate a specific delivery route, meaning the actual path the mail truck would travel in a single drop-off.
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Before you get the +4 Code, your address is taken through the full address standardization and validation process confirm the address is mailable. ZIP plus 4 lookup tools don't just do a full ZIP Code lookup. Using the full ZIP Code with the extra 4 digits when mailing via the USPS ensures the fastest, most accurate mailing possible. ZIP+4 Codes are 4-digit codes appended to the original 5-digit USPS ZIP Codes.