What is an Apple Identifier?
An Apple Identifier is an overarching term for the various numbers, codes, and strings Apple uses to uniquely describe, track, and categorize its devices. Whether you are trying to find the exact model you own to buy a compatible case, or need to check if a device is authentic, understanding these identifiers is essential.
The 4 Main Types of Apple Identifiers
1. Serial Number
The Serial Number is a unique string of letters and numbers assigned to every single Apple hardware product (like an iPhone, pair of AirPods, or Mac). No two devices have the same serial number.
- Used for: Checking warranty coverage status, authenticity verification, repair requests, and tracking stolen devices.
- Example:
C02JW2A1DC79
2. IMEI & MEID Numbers
The IMEI (International Mobile Equipment Identity) is a unique 15-digit number associated with the cellular modem inside an iPhone or cellular iPad.
- Used for: Carrier activation, checking if a phone is "blacklisted" (reported lost/stolen to cellular networks), and verifying network compatibility.
- Example:
358123456789012
3. Model Numbers (A-Numbers and Part Numbers)
Apple uses two public "Model Numbers" to identify a device's generation and configuration.
- A-Number (Regulatory Model Number): Identifies the physical chassis and cellular band layout (e.g.,
A2890). - Part Number / SKU: Identifies the exact configuration including color, storage size, and country of origin (e.g.,
MQ9X3LL/A). The first letter also indicates whether it's New (M), Refurbished (F), or a Replacement (N).
4. Internal Identifiers (e.g., "iPhone15,2")
These are machine-readable identifier strings used by developers and Apple's own software to identify the hardware family or logic board. iOS uses this to know which firmware file to download.
- Used for: Downloading IPSW firmware files, app development, and crash logs.
- Example:
iPhone15,2(which actually refers to the iPhone 14 Pro).
Why are there so many?
Apple separates these to maintain privacy and operational efficiency. The Serial Number tells Apple exactly when and where your device was made for warranty purposes. The IMEI is strictly for cellular carriers. The A-Number helps regulatory bodies (like the FCC) rapidly identify hardware specifications. Together, they form a complete profile of a device.