
Validate ZIP Codes with Regular Expressions
Publié le 7 février 2023

Leonhard Maier
1 réutilisations
Informations
- Type
- API
- Thématique
- Données géospatiales
- ID
- 63e1fafb7e50e35ed4c626d3
Publication
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URL stable
Description
Validate ZIP Codes with Regular Expressions
A Library of JavaScript Regular Expressions for validating if a specific Zip-code exists in a specific Country.
Not every 5 digit number is automatically a zip code... As of now Regular Expression seem to be the fastest way of validating if a zip code actually exists. No slow backend validation needed, just some fancy RegExp.
So Why val-zip? Because it is free for commercial use and it is super fast and light weight with only 448kB size.As of now the Regular Expressions for Germany, Austria, Switzerland, USA (5-Digit version), Belgium, Denmark, Czechia, Finland, Norway, Italy, Spain, Estonia, Iceland, France, Luxembourg are available with more coming asap.
Usage
Download via Node Package Manager (NPM):
npm install val-zip
Import via Content Delivery Network (CDN):
<script type="module" src="https://cdn.skypack.dev/val-zip@latest" corossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script type="module" src="https://cdn.jsdelivr.net/npm/val-zip@latest/dist/val-zip.umd.js" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script type="module" src="https://unpkg.com/val-zip@1.0.12/dist/va-zip.udm.js" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
Note: CDN is still wip, so error may occur. In doubt use skypack cdn
Example
import valZip from "val-zip"; // make sure to use type="module" or the ".mjs" file extension
// alternative: const valZip = require("val-zip");
// note: the require function is nodejs specific and is not available in a ESM or Browser environment.
// make sure to use type="commonjs" or the ".cjs" file extension
// let's say a random user puts in a zipcode somehow and you want to validate if the zip code exists.
var userCountry = "US"; // ISO 3166 Country Code; string
var inputZip_1 = "12345"; // fake, this zipcode does NOT exist in the United States
var inputZip_2 = "00601"; // reak, exists
valZip(inputZip_1, userCountry) // returns false
valZip(inputZip_2, userCountry) // returns true
Zip Code Sources
Note: All data is heavily modified and does not resemble the original data base at all
country | last update | license | source |
---|---|---|---|
Austria | 04.01.2023 | none | Österreichische Post Aktiengesellschaft |
Belgium | 21.11.2021 | none | Bpost |
Switzerland | 01.01.2023 | CC-BY | Die Schweizerische Post |
Czechia | 01.01.2023 | none | Česká pošta |
Germany | 01.06.2019 | none | Launix |
Denmark | 22.06.2022 | none | PostNord Danmark |
United States | 31.12.2020 | none | Internal Revenue Service, US Census |
Norway | 01.10.2022 | none | Osten Norge AS |
Finland | 30.01.2023 | none | Posti Group Oy |
Italy | 26.11.2020 | Eurostat free re-use of data | Eurostat |
Spain | 26.11.2020 | Eurostat free re-use of data | Eurostat |
Estonia | 05.02.2023 | none | Republic of Estonia |
Iceland | 06.02.2023 | none | Íslandspóstur |
France | 06.02.2023 | Open License v2.0 | La Poste Groupe |
Luxembourg | 06.02.2023 | CC-0 | Portail Open Data |
Some Countries are missing, just because the official zipcode database is either paywalled or entirely copyrighted.
This is the List of countries I am unable to source data from:
country | limitation | source |
---|---|---|
Poland | only with permit | Poczta Polska Spółka Akcyjna |
Sweden | paid only | Postnummerservice Norden AB |
Australia | paid only | Australia Post |
MIT License
Copyright (c) 2022-today Leonhard Maier
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