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ATIS 0300048
- 555 NXX Assignment Guidelines
- standard by Alliance for Telecommunication Industry Solutions, 06/17/2015
- Publisher: ATIS
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This document specifies guidelines for the assignment of line numbers within the 555 NXX code. The intended use for 555 numbers for which these guidelines apply include the provisioning of information services but may include a broad range of existing and future services as well. These guidelines currently apply only to the assignment of 555 numbers in geographic NPAs.
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