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The Alliance for Telecommunications Industry Solutions, 04/01/2007
Publisher: ATIS
File Format: PDF
$108.00$217.41
Published:01/04/2007
North American Numbering Plan Numbering Resource Utilization/Forecast Reporting (NRUF) Guidelines
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9YY NXX Code Assignment Guidelines
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800-855 Number Assignment Guidelines
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555 NXX Assignment Guidelines
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