Here is a small documentation what error code prefix is for which service ^ Code ^ Service ^ | 006-XXXX | Game Server (3DS) | | 022-XXXX | Account Server (3DS) | | 101-XXXX | Friends Server | | 102-XXXX | Account Server (Wii U) | | 103-XXXX | Internet Connection | | 104-XXXX | BOSS Server | | 106-XXXX | Game Server (Wii U) | | 107-XXXX | eShop (Api) | | 111-XXXX | eShop (Website) | | 118-XXXX | P2P Connection | | 598-XXXX | Juxt | This list is likely incomplete. Also, only pretendo related codes will be added here, no system errors To look for an specific error, check the official site instead: https://pretendo.network/docs/errors