From mobile phones:
From a Verizon phone to a Page Plus plan, the number port is usually instantaneous.
If you’re porting to Page Plus from another carrier, it will usually be done by 6PM that business day.
Other carriers like H2O, Eco Mobile and Simple Mobile take up to 48 hours.
From a Land Line:
It can take up to 5 business days to port a number from a land line.