This numeric designator serves as a geographical identifier for telephone numbers within a specific region. It allows telecommunication networks to efficiently route calls to the intended destination. For example, a telephone number beginning with 604 would indicate a call originating from or destined for the area served by that code.
Its implementation simplifies the management of telephone resources and facilitates communication across a wide geographical area. The assignment of this particular code reflects the population density and telecommunications infrastructure of the designated zone. Over time, changes in population and technological advancements may necessitate the addition of new area codes or other adjustments to the numbering plan.