There are many »default post types« like post, page or even nav_menu_item. If you talking about post as the default just go to Settings → Permalinks admin page, chose »custom structure« and use /blog/notes/%postname%/ as your structure.
There are many »default post types« like post, page or even nav_menu_item. If you talking about post as the default just go to Settings → Permalinks admin page, chose »custom structure« and use /blog/notes/%postname%/ as your structure.