It is a more efficient use of resources.Ģ See In the Matter of Implementation of the National Suicide Hotline Improvement Act of 2018, WC Docket No.As the boundary elimination will require 10-digit dialing for 602 and 623 NPAs, and the Federal Communications Commission’s (FCC) requirement for 10-digit dialing for the National Suicide Hotline implementation of the 988 3-digit code requires the 480, 520 and 928 NPAs to transition to 10-digit dialing, it creates a consistent 10-digit dialing plan across the entire State of Arizona.It removes the 3-way split of the Phoenix rate center, making it one rate center again. It does not require existing customers to change their area code/phone number.As the 602 NPA is projected to exhaust in the second quarter of 2026, thus kicking off another round of relief planning in the second quarter of 2023, this option would eliminate that need along with the need to open an additional NPA for the 602 NPA area.It eliminates the need to open a new NPA for the 480 NPA area.The boundary elimination in this case would result in the boundaries between the 480, 602 and 623 NPAs being removed, and would require 10-digit dialing within and between the affected area codes.Īdvantages for the Boundary Elimination Overlay include: 1 A rate center is a geographical area used to determine the boundaries for local calling, billing, and assigning specific phone numbers, which can encompass multiple area codes.Ī Boundary Elimination Overlay is a form of NPA relief in which the boundary between existing non-exhausting NPAs and the exhausting NPA is eliminated such that all the area codes serve the same geographic area, forming an overlay over each other. The 623 NPA borders the west and north sides of the 602 NPA, the west side of the 480 NPA and serves the areas of, but not limited to, the City of Glendale and the communities of Avondale, Tolleson, Buckeye, Sun City and New River. Portion of the City of Glendale, and the communities of Cave Creek and Ahwatukee. The 602 NPA borders the west side of the 480 NPA, serves the majority of the City of Phoenix as well as, but not limited to, a The 480 NPA serves the southcentral area of Arizona including, but not limited to, a portion of the City of Phoenix, Chandler, Gilbert, Mesa, Tempe, Scottsdale, and Sun Lakes in the counties of Maricopa and Pinal. In 1999, the Phoenix rate center 1 was split from the 602 NPA into three NPAs, creating the 480 and 623 NPAs. On June 8, 2021, NANPA filed an application with the Commission on behalf of the Industry requesting the Commission approve the Industry consensus of a NPA Boundary Elimination Overlay as the plan for relief for the pending exhaust of numbering resources for the 480 NPA or Area Code. The meeting attendees discussed the relief alternatives and reached a consensus to recommend to the Arizona Corporation Commission (Commission) a Boundary Elimination Overlay as the proposed form of relief. Because the 480 NPA is within 36 months of this projected exhaust, according to NPA Code Relief Planning and Notification Guidelines, NANPA convened an Arizona telecommunications Industry (Industry) relief meeting on April 28, 2021. The North American Numbering Plan Administrator (NANPA) tracks the consumption of telephone numbers and assigns new area codes as necessary.īOUNDARY ELIMINATION RELIEF PLAN FOR THE ARIZONA 480, 602, AND 623 AREA CODESĭue to numbering resource demands, the 480 Numbering Plan Area (NPA), or Area Code, is projected to exhaust its supply of Central Office Codes by the first quarter of 2024. Who oversees the assignment of area codes? A nationwide map of area codes is located at the following web address. There are 10,000 possible combinations for the final four numbers (all the possible combinations from 0000 to 9999). A prefix can begin with any number other than 0 or 1 and cannot end with 11 (as in 911 or 411 – as these are reserved for special uses). A prefix is the three digits of your telephone number that follow the area code. Area codes were first developed in the late 1940s in order to meet the post-World War II surge in demand for telephone service. For example, in Arizona, 480 is an area code. An area code is the first three digits of your telephone number.
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