Local Number Portability (LNP)
Techopedia Explains Local Number Portability (LNP)
LNP primarily helps telecom end users access the existing number regardless of their physical location or the service provider being used. For example, through LNP, a local resident can carry/port an existing number even if they have moved to a new provider, a new home or even a new city.
Typically, LNP works through a local routing number (LRN) service that provides call routing service for telecommunication operators. In the U.S., LNP and LRN are managed by number portability administration centers (NPAC), which generate a new LRN each time a customer switches providers and send that LRN to the new provider to help them route calls for that number.
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