Your PINpoint contacts are sorted by the first field that is displayed on the list, as per your Administrator's chosen configuration. By default this first field is the person's full name.

By changing the display order of the contact fields, an Administrator can make your contacts appear sorted alphabetically by city, department, or position/title.

Alternatively, starting with v2.1 of PINpoint, your Administrator can define groupings of contacts based on static or dynamic parameters.