Service codes
The USSD channel relies on one of three service codes:
Dedicated service code: A code typically owned by one account and used by only one user for their company or service. It only has one segment, for example, *111#. You can add as many sub-codes (extensions) as you want.
Semi-dedicated service code: A code dedicated to one account but shared among other accounts.
Shared service code: A code that is shared and used by multiple companies or services. Each company is allocated a channel on Clickatell's dedicated sub-code but the dedicated parent code is shared. You can add as many sub-codes (extensions) as you want, for example, *111*01*xxx#.
The USSD bearer is accessed by calling a number that starts with the asterisk "*" or hash/pound sign "#", followed by a combination of numerals, asterisks, and finally the hash/pound sign.
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