An non geographic number is a phone that is not linked to a specific geographic location. They allow companies to advertise a national presence regardless of their size and give off a big business image. The use of a non-geographic number is also a highly professional way to advertise your contact details as you can utilise a highly memorable and recognisable number, instead of a personal mobile or landline number.
Additionally to these straight forward benefits a major characteristic of using a non-geographic number for inbound call traffic is that all calls can be intelligently mapped locally or nationally. For example, a business could operate over several locations or have multiple operators taking calls in a call centre. Plus as the number is virtual a business can change their destination number in the event they move premises.