Is Valid US ZIP

A "small" library for checking if a US 5 Digit ZIP code is real.

Install

npm install is-valid-us-zip

Usage

const isValidUSZip = require('is-valid-us-zip');

isValidUSZip("75000") // false

The function will return false for a value that is not a stirng. As you can't reference some zip codes as a number, due to the starting with a 0.

Building

Download a copy of the AREADIST_ZIP5.TXT file from USPS and pipe it into the tree builder script.

$ cat AREADIST_ZIP5.TXT | node build/make-tree.js

Data Source

• https://postalpro.usps.com/address-quality/ais-viewer - AREADIST_ZIP5.TXT