While similar in function, 1800, 1300, and 13 numbers differ in terms of call charges.
1800 number call costs are completely shouldered by the business. These are recommended for established businesses that want a nationwide number that anyone can call at no charge. Since calls to these numbers are completely free for customers, they work best as after-sales and customer support lines.
1300 number call costs are shared between the caller and the business. This makes it a popular option among SMEs who want to extend their presence on a limited budget. With callers charged a local rate, this type of inbound number is effective for deterring nuisance and unwanted callers.
13 numbers work exactly like 1300 numbers, but are shorter and more memorable with only 6 digits. As it comes with an additional annual government surcharge, this type of inbound number is recommended for large enterprises in highly competitive industries.