The state of Idaho will be implementing a new 10-digit calling requirement on August 5. This requirement states that any dialed phone number, local or otherwise, must be at least 10-digits long. If you attempt to dial a 7-digit number after August 5, you will receive an error message asking you to "hang up and try again."
This change is due to a new area code that will be added to new Idaho phone numbers. This new area code will not change your phone number, nor will it cost anything. It just means that every phone number you dial in Idaho must be dialed with its area code in order to differentiate similar numbers with different area codes.
Even though this change is state-wide, campus phones will go unaffected. You will still be able to dial an extension and reach a coworker without a problem.
If you are in Idaho, be sure to change all of the contacts in your personal phone so they include the number's area code. This way, you will be able to reach your contacts after August 5 without issue.