Abbreviated dialing

Abbreviated dialing is the use of a very short digit sequence to reach specific telephone numbers, such as those of public services. The purpose of such numbers is to be universal, short, and easy to remember. Typically they are two or three digits.

Carriers refer to the shortened number sequences as abbreviated dialing codes (ADCs). Unlike SMS short codes, they are generally not automatically synchronized across carriers. ADCs are provisioned separately for mobile networks versus landline networks.