015107 Zip -

as it contains six digits, whereas US ZIP codes strictly use five digits (or nine digits for ZIP+4). However, 015107 serves as a valid postal code for Bayannur, Inner Mongolia, China .

Apply these conditional regular expression constraints depending on the detected or selected country: Code Example Regex Pattern 015107 ^[0-9]{6}$ United States 90210 ^[0-9]{5}$ United States (ZIP+4) 90210-4321 10 Characters ^[0-9]{5}-[0-9]{4}$ 3. Database Schema (PostgreSQL Example) 015107 zip

When a user queries the system for code 015107 , the backend should return a mapped geographic payload: as it contains six digits, whereas US ZIP

CREATE TABLE user_addresses ( id SERIAL PRIMARY KEY, street_address VARCHAR(255), city VARCHAR(100), state_province VARCHAR(100), -- Always use VARCHAR for postal codes to keep leading zeros postal_code VARCHAR(12) NOT NULL, country_code CHAR(2) NOT NULL ); Use code with caution. Copied to clipboard 4. API Response Model (JSON) Database Schema (PostgreSQL Example) When a user queries

This technical feature enables your application to accept, parse, and validate both 5-digit US ZIP codes and 6-digit international postal codes (like China's 015107 ) without failing. 1. User Interface (UI) Behavior : Create a single "Postal / ZIP Code" text field.