: In the context of the USPS, a "long post" or "long ZIP" typically refers to the ZIP+4 Code . This system adds four extra digits to the standard five-digit code to identify specific segments like city blocks or apartment groups.
If you are looking for a specific address's full 9-digit code, you can use the official USPS ZIP Code Lookup tool . ZIP Code™ Lookup | USPS 154785 zip
However, the sequence appears in technical and scientific databases: : In the context of the USPS, a