Local number portability (LNP)

enables customers to keep the same phone number when changing service providers or carriers. The transferring of landline numbers to other landline numbers has
existed for several years. Now, thanks to wireless number portability (WNP),
which is often also referred to as Local Number Portability, customers will also
be able to keep the same phone number when transferring their landline phone
service to wireless service and vice versa

See Rogers