The phone system has three sets of extension ranges: one for users and locations, one for Auto Attendants, and one for call groups.
To view extension ranges, follow these steps:

  1. Expand Company Settings and select Business Details in the left menu.
  2. Scroll down to the Extension Management section.
  3. The following fields are displayed:
    • User/Location Min. - displays the first number available for phone extensions.
    • User/Location Max. - displays the last number available for phone extensions.
    • Call Group Min. - displays the start of the range used for Call Groups
    • Call Group Max. - displays the last number in the range used for Call Groups.
    • Auto Attendant Min. - displays the first number available to use for an Auto Attendant.
    • Auto Attendant Max. - displays the Last number available to use for an Auto Attendant.