" 6 Digit Codes refers to reference codes for the pornographic website nHentai. Typing various 6-digit numbers onto the end of an nHentai URL leads to specific issues of hentai series' on the site. These numbers are used on various social media platforms to share the sauce for specific hentai. Image macros referencing 6 digit codes became popular in anime circles throughout 2020, often missing context regarding what the numbers mean to confuse those out-of-the-loop."