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Report

Numbering Resource Utilization in the U.S. (As of 12/31/05)

This is the Federal Communications Commission’s report on numbering resource utilization in the United States.  In this report, we summarize an ongoing systematic collection of comprehensive data on the utilization of telephone numbers within the United States.  The underlying information was acquired from carriers holding numbering resources and was analyzed as part of our ongoing assessment of the efficacy of numbering resource optimization measures prescribed by the Commission’s Numbering Resource Optimization (NRO) Orders.

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