Feedback on Naming Convention in libphonenumber (RegionCode)

[djamal nail]

Hello all,

First of all, thank you to the team behind this library — it's been incredibly helpful for our Android project.

My team has been using libphonenumber for a while now. As our use cases have expanded, the complexity of our code has naturally increased. Recently, while debugging a reported issue, I noticed that we’ve been using the term RegionCode to refer to what I initially thought was a geographic area code (like 212, 315, 347 for New York). However, I realized it actually refers to the ISO Alpha-2 country code — for example, "US" in this case.

This naming led to quite a bit of confusion and made debugging harder than it needed to be. After some digging and a fair amount of renaming in our codebase, I realized this naming likely originated from the library itself.

So, just a small suggestion — it might help other developers if the library clarified or renamed RegionCode to something more descriptive, like CountryAlpha2Code or similar. It could prevent misunderstandings, especially for those less familiar with the terminology.

Thanks again for your work on this project!

Best regards,

NAIL Djamal Eddine

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