Short Codes are special telephone number, considerably shorter than full telephone numbers, which can also be used to address SMS and MMS messages from mobile or fixed phones. While similar to telephone numbers, they are, at the high-tech level, unique to each operator, although providers mostly have agreements to avoid overlaps. Short codes are widely used for value-added services such as interactive voting, ordering ringtones and other mobile services. Short codes are very ideal for marketing campaigns and promotions when you want people to easily remember your number or if you want to encourage conversations between you and your audience. Even though short codes work across all major mobile operators. Short codes are still country specific and can't be used if you want to receive replies from international destinations.