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Your zip plus 4 changes. It isn't worth trying to know as it isn't supposed to be constlnt. If you send a lot of mail there is a discount for using it but you h
by bluGill 8mo ago
Your zip plus 4 changes. It isn't worth trying to know as it isn't supposed to be constlnt. If you send a lot of mail there is a discount for using it but you have to update everyone's address often (iirt at least 4x per year)
- fingerlocks 8mo agoSource? The numbers correspond to the USPS distribution centers and carrier routes. If the numbers are changing that would imply an increase in zip code subdivisions, making each zip code a better address predictor for a given individual.
- bluGill 8mo agohttps://faq.usps.com/s/article/ZIP-Code-The-Basics https://faq.usps.com/s/article/ZIP-Code-The-Basics I don't know how to link to the correct question but there is why did my code change.