You need to be more explicit. The only 850k beadchip I know of is the Cyto-SNP 850, which isn't a methylation array. Perhaps you mean the EPIC? Also, what do you mean by 'I annotated my methylation data'? How? Using what package? Is this even a Bioconductor question?

Do note that Non-coding is not likely to refer to DNA, but instead to a type of RNA that doesn't get translated to protein, which would more accurately be described as Untranslated. But it is relatively common to call things like miRNA, snoRNA, lncRNA, etc 'Non-coding'.