what does serial number mean

It is simply the number assigned to your device as it is manufactured in succession with all other similar devices.

It has no meaning other than the order that the device came off the assembly line.

However, it may be used to identify the specific model and features of your device, and also may be used to determine warranty eligibility.

Use this Serial Number Lookup to learn more about the service and support options for your Apple device:

https://checkcoverage.apple.com

I hope this helps.

It is a unique way of identifying your computer in the event it is lost or stolen. If you enter the serial number at a site that can decode it, then you can get certain information about the machine. However, your serial number returned this:

The Serial number you entered (*************) is either of a (so far) unsupported model or incorrect.

Please try again or submit the information by clicking the URL below. 

(If you entered the serial number starting with an 'S', try it without. Make sure you replace O with 0 (zero))

On a different site this is reported:

This serial number is for an iPhone X. Is yours on Verizon or Sprint in the United States or a carrier in Australia, New Zealand, China, Hong Kong, or India (A1865); on AT&T or T-Mobile in the United States or a carrier in Canada, the UK, the EU, or elsewhere (A1901); or on a carrier in Japan (A1902)? Please share. Thank you.

Your serial number is an identifier unique to your device. It can be used by support to identify the model, purchase date, and other information.