The GSM phones may regard some phone numbers with one or two digits as special service codes.

Modifies the service code, often used for different billing options.

See Domestic long-distance service code and Area code.

But Jack Straw reminds me that, contrary to what i wrote, the civil service code is already enacted.

These are called supplementary services and are commonly invoked by a Vertical service code.

These keys were initially unused by most customers, but would later be used for vertical service codes, and voice mail menu navigation.

A current civil service code was introduced on 6 June 2006 to outline the core values and standards expected of civil servants.

Once authorized, a user simply needs to prepend calls the vertical service code of "*272" to receive priority consideration on the wireless network.

Some stations may have vertical service codes for use by mobile telephones.

Merchant terminals are required to recognize and act on service codes or send all transactions for online authorization.