It depends on the category of the port.
Cat A ports usually take 5-10 business days to complete.
This assumes all information submitted complete and correct - if the losing carrier rejects the port due to a mismatch this will cause delays.
Cat C ports generally require a minimum of 30 days but can take up to 60 days to complete.
All details on the porting request must be complete and correct before submitting. Please be aware for 'complex services' you need to include all the associated numbers in your port request. For example: all the numbers in a line hunt must be ported together, all the numbers in a 100 number range or all the numbers in a Telstra DoT or Commander Phone 'site'. Failure to include all numbers will delay the porting process.