Translation guide
A country code is a short alphabetic or numeric code used to represent countries and their subdivisions. In Japanese, it is typically expressed using the borrowed English term or descriptive phrases.
日本の国コードは何ですか？
What is the country code for Japan?
The learner wants to refer to a country code in general, such as in computing, telecommunications, or data.
The most direct translation, combining 'country' (国) and 'code' (コード). Commonly used in technical contexts.
この国コードはISO 3166で定義されています。
This country code is defined in ISO 3166.
The loanword from English, widely understood in IT and telecommunications.
電話をかける前にカントリーコードを入力してください。
Please enter the country code before making the call.
Literally 'country number', sometimes used for telephone country codes, but less common than 国コード or カントリーコード.
日本の国番号は81です。
Japan's country code is 81.
The learner specifically wants to talk about the numeric prefix for international phone calls.
A clear descriptive phrase: 'country code of international phone numbers'. Often shortened to just 国コード in context.
国際電話をかけるときは、最初に国コードをダイヤルします。
When making an international call, first dial the country code.
The English loanword is very common in mobile phone settings and tech support.
スマホの設定でカントリーコードを確認できます。
You can check the country code in your smartphone settings.
The learner wants to refer to two-letter top-level domains like .jp, .uk, .us.
The formal term for country code top-level domain (ccTLD). Often abbreviated as ccTLD in technical writing.
日本の国別コードトップレベルドメインは.jpです。
Japan's country code top-level domain is .jp.
A shorter, common way to say 'country-specific domain'.
このサイトは国別ドメインを使っています。
This site uses a country code domain.
The learner is discussing standardized two-letter (alpha-2) or three-letter (alpha-3) codes from ISO 3166.
Direct combination of 'ISO' and 'country code'. Widely used in data processing and localization.
データベースにはISO国コードを使用してください。
Please use ISO country codes in the database.
Full standard reference, used in formal documentation.
ISO 3166国コードはアルファベット2文字または3文字です。
ISO 3166 country codes are two or three letters.
In Japanese, 'country code' can be translated differently depending on whether you mean telephone codes, internet domains, or ISO standards. Use 国コード as a safe general term, but specify the context if needed.