1300 and 1800 numbers are both considered to be 'non-geographic' numbers, meaning they are not linked to any particular location. They are both designed for business use. 1800 numbers are 'Toll Free' - free to call for the caller but the receiver pays for the inbound call. 1300 numbers are 'shared cost' meaning that the caller will pay the cost of a local call and the receiver will also pay a lower rate for inbound calls.