I want to add extra amount to the total cart value depending on the customers pincode in magento 1.9.x. Kindly help.
I don't know your exact requirements, but this may work for you :
check the extension configuration in link.
how it works is by importing a CSV file with zip codes, countries, weight and price. You can use a wildcard ("*") if you don't worry about some columns & it works based on website scope.