In the case of Phoenix, Arizona, party-line service was commonly used prior to the 1960s. During that time, it was not uncommon for multiple families or households to share a single telephone line, especially in rural or densely populated areas. The specific numbers assigned to party lines in Phoenix were not specific to any particular exchange, but rather were determined by the telephone company's infrastructure and customer demand.
With the advancement of telephone technology and the introduction of direct-dialing services, party-line telephone service gradually became obsolete. By the late 1960s, most telephone customers in Phoenix had access to individual telephone lines and dedicated phone numbers.
