Create a central office code

  • Release version: Australia
  • Updated March 12, 2026
  • 1 minute to read

    • Create a central office code to allocate it to an area code of a country by using the Telecommunications Network Inventory application.

    Before you begin

    Role required: sn_ni_core.inventory_admin

    About this task

    You can create, review, update, or delete a central office code. You can also view the details of an area code or allocate a central office code to an area code of a country by using the Telecommunications Network Inventory application.

    Procedure

    1. Navigate to Workspaces > Network Inventory Workspace.
    2. Select the list icon (List icon.), and then go to Administration > Central office code.
    3. Select New
    4. On the Details tab, on the form, fill in the fields as follows.
      Table 1. Create New Central Office Code
      Area Code Code that identifies a geographic region within a country or territory. It’s usually the first three digits of a telephone number. The purpose of the area code is to route telephone calls to destinations that are based on the location of the recipient.

      For example, in the phone number (123) 456-7890, "123" represents the area code.
      Central Office Code

      Central office code that is also referred to as NXX. The NXX portion of a telephone number provides information about the central office or local exchange that belongs to a particular geographic area. Each central office code is related to a geographic location or service provider within the area code.

      For example, in the phone number (123) 456-7890, "456" represents the central office code.
    5. Add the attachments, such as the graphics or documents, by selecting the attachment icon (Attachment icon.) in the right panel.
    6. Select Save.
      A central office code and an area code are added in the list view of the central office code.
    7. Optional: If you want to delete a central office code, navigate to that code, select the options icon (Options icon.), select Delete, and select OK when you see the confirmation window.

    What to do next

    Create a country code. For information, see Create a country code.