"Purpose Scope The purpose of this document is to evaluate potential uniform dialing plans for the North American Numbering Plan (NANP) serving area and make appropriate recommendations. The document includes a brief history of dialing in the NANP area@ provides comparisons of identified dialing plan alternatives considering specific impact areas (e.g.@ end user impacts)@ and recommends a transition to a uniform dialing plan described in Section 6. The North American Numbering Plan Administration (NANPA) proposed in its document ""Proposal on the Future of Numbering in World Zone 1"" (IL 93/01-008) that the telecommunications industry study the feasibility of a uniform dialing plan. On December 10@ 1993@ NANPA introduced Issue #020 to the Industry Numbering Committee (INC). This issue suggested that the industry study the dialing considerations and feasibility of implementing a uniform dialing plan in the NANP serving area and make appropriate recommendations@ including the possible evolution to 10-digit dialing. The primary benefit is that a uniform dialing plan would be more customer focused particularly in today's mobile society. In addition@ it would effectively support a consistent@ fair and equitable competitive environment. A set of alternative dialing plans were proposed in INC Workshops as candidates for a uniform dialing plan. These alternate plans included six variations of using either 7 digits@ 10 digits@ or 1 + 10 digits in various combinations to make local and toll calls to Home NPAs (HNPA) or Foreign NPAs (FNPA). A set of impact areas was developed by the workshop for use in comparing each alternative. These areas included sociological factors/human factors@ and impacts on networks@ the NANP@ CPE (Customer Provided Equipment)@ coin services@ operator services@ etc. Attachment A illustrates the current use of dialing combinations on a mandatory and permissive basis for local and toll calling in NANP locations (i.e.@ total of NPAs and countries within NPAs)."