alt Hacker NewsSource? 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.
Source? 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.
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.