| Administrative Numbers - numbers which
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| | numbers which are not yet in use by
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| cannot be assigned to customers and which
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| | customers, but are pending use.
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| perform a certain administrative
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| | Intermediate Numbers - the numbers which
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| function. They may be Local Routing
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| | are opened for availability by other
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| Numbers, employee/official numbers, test
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| | carriers or non-carriers which provide
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| numbers, wireless E911 emergency service
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| | phone service to a customer.
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| routing digits/key (ESRD/ESRK), Temporary
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| | NXX Code - a block of 10,000 phone
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| Local Directory Numbers (TLDN), and
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| | numbers which is identified by the second
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| soft-dial tone numbers. They are also the
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| | set of 3 digits in the telephone number.
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| numbers used by carriers for internal
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| | This is also known as a prefix.
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| operational functions for maintaining
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| | Personal Communications Service -
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| service standards as well as internal
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| | officially, this is recognized as "a set
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| administrative functions.
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| | of capabilities that allows some
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| Aging Numbers - disconnected numbers
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| | combination of personal mobility,
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| which, for a certain period of time, are
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| | terminal mobility, and service profile
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| not available to be reassigned to another
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| | management. It enables each personal
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| customer.
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| | communications service user to
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| Area Code - also referred to as a
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| | participate in a user-defined set of
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| numbering plan area (NPA), they are a set
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| | subscribed services and to initiate and
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| of three digits.
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| | or receive calls on the basis of some
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| Area Code Split - an area code type where
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| | combination of a personal number,
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| one geographical region is subdivided
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| | terminal number, and service profile
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| into zones which are each assigned a
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| | across multiple networks at any terminal,
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| different area code.
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| | fixed or mobile, irrespective of
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| Area Code Overlay - a type of change in
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| | geographic location. Service is limited
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| area code where one geographical region
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| | only by terminal and network capabilities
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| uses several area codes.
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| | and restrictions imposed by the personal
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| Assigned Numbers - the numbers
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| | communications service provider."
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| functioning within the Public Switched
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| | Prefix - a block of 10,000 phone numbers
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| Telephone Network and which are under
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| | which are identified by the second set of
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| contract or tariff with customers for
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| | 3 digits in the telephone number. This is
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| their use. They may also be telephone
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| | also known as NXX code.
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