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  • ATIS 0300048

ATIS 0300048

555 NXX Assignment Guidelines

The Alliance for Telecommunications Industry Solutions, 11/09/2012

Publisher: ATIS

File Format: PDF

$147.00$295.46


Published:09/11/2012

Pages:24

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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