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This question already has an answer here:

Is there a 9 digit Zip Code (Example- 75001-6664, Zip + 4) data set that I can download? Please advise.

merged by PolyGeo Mar 24 '16 at 2:01

This question was merged with Sources for US Zip Code Boundaries? because it is an exact duplicate of that question.

  • @PolyGeo the linked question is not a duplicate. ZIP+4s and ZIP Code boundaries are not at all the same thing. – dbaston Mar 24 '16 at 1:01
  • @dbaston If you have any association with Maponics then you are required to disclose that in every answer that you post here that is seen to be recommending it. When determining duplicates the contents of both the questions and their answers are taken into account. – PolyGeo Mar 24 '16 at 1:58