# MacOS Serial Number
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Apple devices manufactured after 2010 generally have **12-character alphanumeric** serial numbers, with the **first three digits representing the manufacturing location**, the following **two** indicating the **year** and **week** of manufacture, the next **three** digits providing a **unique** **identifier**, and the **last** **four** digits representing the **model number**.
Serial number example: **C02L13ECF8J2**
### **3 - Manufacturing locations**
| Code | Factory |
| -------------- | -------------------------------------------- |
| FC | Fountain Colorado, USA |
| F | Fremont, California, USA |
| XA, XB, QP, G8 | USA |
| RN | Mexico |
| CK | Cork, Ireland |
| VM | Foxconn, Pardubice, Czech Republic |
| SG, E | Singapore |
| MB | Malaysia |
| PT, CY | Korea |
| EE, QT, UV | Taiwan |
| FK, F1, F2 | Foxconn β Zhengzhou, China |
| W8 | Shanghai China |
| DL, DM | Foxconn β China |
| DN | Foxconn, Chengdu, China |
| YM, 7J | Hon Hai/Foxconn, China |
| 1C, 4H, WQ, F7 | China |
| C0 | Tech Com β Quanta Computer Subsidiary, China |
| C3 | Foxxcon, Shenzhen, China |
| C7 | Pentragon, Changhai, China |
| RM | Refurbished/remanufactured |
### 1 - Year of manufacturing
| Code | Release |
| ---- | -------------------- |
| C | 2010/2020 (1st half) |
| D | 2010/2020 (2nd half) |
| F | 2011/2021 (1st half) |
| G | 2011/2021 (2nd half) |
| H | 2012/... (1st half) |
| J | 2012 (2nd half) |
| K | 2013 (1st half) |
| L | 2013 (2nd half) |
| M | 2014 (1st half) |
| N | 2014 (2nd half) |
| P | 2015 (1st half) |
| Q | 2015 (2nd half) |
| R | 2016 (1st half) |
| S | 2016 (2nd half) |
| T | 2017 (1st half) |
| V | 2017 (2nd half) |
| W | 2018 (1st half) |
| X | 2018 (2nd half) |
| Y | 2019 (1st half) |
| Z | 2019 (2nd half) |
### 1 - Week of manufacturing
The fifth character represent the week in which the device was manufactured. There are 28 possible characters in this spot: **the digits 1-9 are used to represent the first through ninth weeks**, and the **characters C through Y**, **excluding** the vowels A, E, I, O, and U, and the letter S, represent the **tenth through twenty-seventh weeks**. For devices manufactured in the **second half of the year, add 26** to the number represented by the fifth character of the serial number. For example, a product with a serial number whose fourth and fifth digits are βJHβ was manufactured in the 40th week of 2012.
### 3 - Uniq Code
The next three digits are an identifier code which **serves to differentiate each Apple device of the same model** which is manufactured in the same location and during the same week of the same year, ensuring that each device has a different serial number.
### 4 - Serial number
The last four digits of the serial number represent the **productβs model**.
### Reference
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