From d8d83ffc2b6e91a51a19748bd0828b0318f4a2c6 Mon Sep 17 00:00:00 2001
From: zipcodestack <121109016+zipcodestack@users.noreply.github.com>
Date: Wed, 5 Apr 2023 10:09:43 +0200
Subject: [PATCH] Added zipcodestack.com (#135)

Update README.md
---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index 38bac4a..1a7622a 100644
--- a/README.md
+++ b/README.md
@@ -993,6 +993,7 @@
 | [ZipCodeAPI](https://www.zipcodeapi.com) | US zip code distance, radius and location API | `apiKey` | Yes | Unknown |
 | [Zippopotam.us](http://www.zippopotam.us) | Get information about place such as country, city, state, etc | No | No | Unknown |
 | [Ziptastic](https://ziptasticapi.com/) | Get the country, state, and city of any US zip-code | No | Yes | Unknown |
+| [Zipcodestack](https://zipcodestack.com/) | Zip Code API - Free Postal Code Validation | `apiKey` | Yes | Unknown |
 
 **[⬆ Back to Index](#index)**