LATAs were originally area codes, but some LATA now contain two or more area codes to maintain local calling rates when new area codes are implemented. Calls made within a LATA are handled by a local telephone company. Monthly Minimum Certain calling programs require that you spend a certain amount each month on long distance service. Companies that fail to meet the monthly minimum may be penalized, or charged for the difference. The cost of making a call before or after business hours.
Some programs have two off-peak rates, with a low evening rate and a very low night rate.
However, each program can define off peak rates for whatever times they want. See peak rates . The cost of making a call during business hours. Not all carriers define peak rates as the exact same hours of the day, which can effect your total cost. See off peak rates .