This will be the numbers section. With that in mind, I will note each page with the role that number will serve. Within the page, you would get the first 3 digits of the telephone, and allow you to see how things will work. The numbers are the most important component. While the devices are needed for most of the numbers, these devices can change, and become different. The same will go for the carrier. The goal will be to have same last 7 digits of the numbers to be the exact same, therefore allowing the first 3 digits to be different.