Shorter than the standard mobile number, short codes consist of three to eight digits and usually used for A2P messaging. These virtual numbers can be used to receive inbound SMS. Messages to these numbers are only possible from within the same country they are registered (that is, they will only work for domestic SMS traffic). Short code has varying restrictions in different countries. For example, in the USA, short codes are limited to five to six digits; in the UAE, they are four digits long; in Australia, they are six to eight digits long; and, in New Zealand, they are three to four digits long.
Dedicated Short Code means a private Short Code allocated exclusively to one account, whether it be used by a business, organization or entity.