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1Frequently Asked Questions
Regional Divisions & Cities
Yamagata encompasses diverse geographical zones and municipal areas. This platform indexes 1 major cities in Yamagata, linking each city to its postal codes, neighborhoods, and regional phone area codes.
State-Level Telecom Infrastructure
Each Japanese prefecture adopts its own unique local area code division (e.g., 3 for Tokyo, 6 for Osaka, and 90, 80, 70 for mobile phones). Please click on a specific prefecture to generate simulated test numbers conforming to the local phone format.
How to look up the exact postal code for a specific district or street under Yamagata?
You can select the corresponding city from the list above. On the city page, we provide a complete mapping table of districts, streets/neighborhoods, and their exact postal codes. You can also use the search bar at the top to instantly locate a street or neighborhood.
What is the purpose of the zip code database and simulated phone generator for Yamagata?
The database compiles all major cities and postal districts within Yamagata. The tools allow developers and QA testers to generate format-compliant phone numbers to verify web forms, check localization rules, and test regional validation logic.
Are the phone numbers generated for Yamagata active and real?
No, all numbers generated are simulated. They use the correct country prefix and the local area codes assigned to Yamagata, but the subscriber numbers are randomly generated for software validation purposes. They cannot make or receive calls, nor can they receive SMS verification codes.
How frequently is the postal code data for Yamagata updated?
Our database is regularly synced with official postal updates and open-source registry databases. While we strive to maintain high accuracy for development and testing purposes, you should always check the official national postal service for critical mailing validation.