This was fun to learn, that in Star Trek, NCC stands for “Naval Construction Contract.” This designation is used for commissioned starships in Starfleet, such as the USS Enterprise with registry number NCC-1701. Nx is for experimental or prototype ships.
https://blossom.primal.net/4909876e10740d0688848f69d8f40952d3e9a2fd41a85030cc5bac7d98d56911.mp4