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The CPUC's Telecommunications Division (TD) first obtained and analyzed data from the 310 area code in Los Angeles late in 1999, and produced a utilization report on 310 in March, 2000. (Chapter 99-809, 1999.) AB 406, codified as Public Utilities Code Section 7937, requires the CPUC to obtain historical telephone number use data from every telecommunications company in California. This report is filed in compliance with CPUC Decision (D.) 99-12-051, and with AB 406, enacted by the California Legislature in the 1999 legislative session. The report further urges the CPUC to seek from the FCC authority to implement Unassigned Number Porting (UNP) as a means to more efficiently use numbers still available in the 510 area code. The data further establishes that the 510 area code possesses considerable room for growth, and thus, aggressive measures such as splits or overlays are not yet warranted. The study found that of the 7.8 million useable numbers in the 510 area code, approximately 4.3 million, or more than half, presently are not in use. The data reveals that despite increasing demand for numbers, the 510 area code is not fully utilized. The utilization study sheds new light on the numbering crisis in the 510 area code. Data is self-reported by the companies the CPUC staff has not audited any 510 utilization data submitted for this study and report. In addition, the report analyzes number use by carrier category and identifies what measures the CPUC can employ in the 510 and other area codes to improve efficiency of number use in order to avoid prematurely opening new area codes. The report evaluates the status of number availability in the 510 area code, and discusses the various state and federal policies which govern number use in California and nationwide. This report should be viewed in a broader context than the facts pertaining solely to the 510 area code. This study recounts the history of the 510 area code, from its creation in 1991, through one split, to its present status, covering the East Bay region from Crockett south to Fremont. Without these measures, the CPUC projects that 16 more area codes would need to be opened by the end of 2002, resulting in a statewide total of 41 area codes. The California Public Utilities Commission (CPUC) recently has implemented several measures intended to ensure efficient use of telephone numbers. By the end of 1999, California had 25 area codes statewide. During the next three years, however, the number of area codes in California nearly doubled. From 1947 to January 1997, the number of area codes in this state increased gradually from 3 to 13. Like much of the country, California currently is experiencing a numbering crisis. Sharing Prefixes May Yield More Efficient Number Use 43 Consolidation of Rate Centers to Maximize Number Use 41į. Lack of Local Number Portability Stands as a Key Barrier to Pooling 38Į.
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More Accurate Forecasting Will Improve Number Pooling 37Ĭ. Restrictions on Administrative Numbers Could Yield More Numbers 30ĬHAPTER THREE: NUMBER POOLING AND OTHER NUMBER CONSERVATION MEASURES 36ġ. Reserved Numbers Are a Potential Source of Additional Numbers 28ģ. Expanded Use of the 555 Prefix Could Release Other Prefixes DedicatedĢ. Analysis of 3.5 Million "Unavailable" Numbers 23ī.Eliminating Interim Number Portability Releases Numbers forĬ. Potential Block Contamination Abuses 22ĭ. Analysis of Wireless Carriers' Contamination Rate 20ģ. Analysis of Wireline Carriers' Contamination Rates 18Ģ. Numbers Available in the 415 Area Code 15ġ. Improved Number Inventory Management 9ĬHAPTER TWO: 4.3 MILLION UNUSED NUMBERS IN THE 510 AREA CODE 14ġ. CPUC Efforts to Resolve Area Code Proliferation 8Ģ. Numbers Allocated Through Monthly Lottery 8Ĭ. Inefficient Use and Increasing Demand for New Numbers in California Is Causing Area Code Proliferation 6ġ. Submitted in Compliance with California Public UtilitiesĬode Section 7937, CPUC Decision 99-12-051, and Administrative Law JudgeĪ. Order Instituting Investigation on the Commission's own Motion Into Competition for Local Exchange Service. Order Instituting Rulemaking on the Commission's own Motion Into Competition for Local Exchange Service. Before The Public Utilities Commission Of The State Of California