MMT7454 wrote:
Are you working in apple company?
No. However, there are plenty of website where one can look up that kind of information. There are occasionally Apple representatives who post here, but they will have something like "Community Manager" noted.
sergekills gave you what the first letter means. "R" is for a retail refurbished device. I found the meaning of ZP here:
https://www.theiphonewiki.com/wiki/Models
https://www.theiphonewiki.com/wiki/Model_Regions
The rest takes a bit of detective work. Since there are more of them sold in the US, I changed the model number to MN4W2LL/A entered that into a search engine, and received listings of used iPhones for sale with the specific model information.