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Apple does not appear to publish a comprehensive official list of iPhone part numbers ending in codes such as LL/A, ZP/A, CH/A, or J/A, which are commonly used to identify the market or region for which an iPhone was intended. You may refer to this Apple's Article for all iPhone identifications --> Identify your iPhone model

However, several community-maintained websites compile these part numbers and their associated regional information. Although these resources can be useful, they are not official Apple documentation, and their information should be cross-checked where possible.

You may refer to the following resources:

1. Wikipedia – List of iPhone Models: List of iPhone models :This page provides information about different iPhone generations, model numbers, and regional hardware variants.
2. The Wiki – Models: Models This community-maintained resource provides information about Apple product identifiers and model variations. Please note that Applewiki.com is a third-party website and is not affiliated with Apple.com.

Important distinction: The part number ending in a regional code, such as LL/A or ZP/A, is different from the hardware model number beginning with A, such as A3084. Apple officially documents how to find these identifiers under Settings → General → About. Tapping the entry beside Model Number switches between the part number and the hardware model number. Get information about your iPhone - Apple Support (BY)

Therefore, if you want to identify the intended sales region of an iPhone, the community-maintained lists above may be helpful. For the device's hardware model and regional hardware specifications, Apple's official documentation remains the more reliable reference.