These are short codes that are easier to remember for example 20888 or 22444 because they are highly in demand they are more costly.
These are short codes that are assigned to one client only. Businesses or organizations that need increased customization choose to use dedicated short codes. A dedicated short code is your personal short code; no other business or service will have the same short code.
These short codes can be allocated to more than one client at a time. Shared short codes are easier and cheaper to set up than Golden or Dedicated short code.