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created: 2025-10-27T09:17:57.483Z
---# Local Number Portability (LNP) | porting ported

**URL:** [https://clnpc.ca/about/](https://clnpc.ca/about/)

Local Number Portability (LNP) | porting ported Call Flow to a Ported Telephone Number When a call is made to the ported telephone number, the initiating service provider switch launches a query to its LNP call routing database to determine whether the telephone number has been ported. If it has, the database response provides the switch with the LRN needed to properly route the call. If the number is not ported, the database response indicates that the call should be routed based on the telephone number. When multiple switches are involved in the call path, the next to last carrier has the responsibility to make the LNP database query if one has not already been made.


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**Keywords:** mine
