2160p is an alternative name for 4K UHD, a resolution supported by UHDTV products and which offers four times the definition of 1080p. The number 2160 stands for 2,160 vertical lines of display resolution, while the letter p stands for progressive scan or non-interlaced. In a progressive image, the lines of resolution of the image go from the top of the screen to the bottom. The only planned higher definition format for television is 8K UHD.
On June 29, 2016, NBC affilate station, WRAL-TV becomes the first US Television Station to broadcast at both 1080p and at 2160p using ATSC 3.0 Digital Television Standards and operates under an FCC Experimental License on UHF Channel 39 as WRAL-EX. It's 4K sub channel (39.2) broadcasts a 4K UHD Demo loop.