Mass Workflow Rule

Mass Workflow Rule

Hello,

I need to create a workflow rule that ticks a certain box when criteria is met.

When an enquiry comes in that starts with certain letters in the postcode, i.e IP1, then it ticks the box.

Simple, however, I need it to trigger on 475 different postcodes so my question is, is there a quick way of doing this or do I have to add them all individually as "or" criteria?

thanks