Efficient number management is crucial for ensuring the orderly and systematic use of telephone numbers, which are a limited and valuable resource. 

• Allocation of Numbers: Number management involves the allocation of numbers to telecommunication service providers. This includes assigning specific number ranges for different services like mobile, landline, and VoIP services.

• Numbering Plan: Each country has a national numbering plan that sets out the rules for telephone number structures, including country codes, area codes, and the format of local numbers. Number management ensures adherence to this plan.

• Portability Management: Number portability, which allows customers to keep their phone numbers when changing service providers, is a key aspect of number management. It requires coordination among various service providers.

• Emergency and Special Numbers: Managing numbers also includes the allocation and governance of special number ranges like emergency numbers (e.g., 911, 112) and service numbers (like toll-free numbers).

• Database Management: Maintaining up-to-date databases of number allocations is essential for various operational aspects, including billing, routing, and customer service.

Number management plays a crucial role in the telecommunications industry, ensuring efficient use of numbering resources, compliance with regulatory requirements, and providing a framework for the orderly expansion of telecommunication services.