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The Alliance for Telecommunications Industry Solutions, 09/01/2008
Publisher: ATIS
File Format: PDF
$111.00$222.79
Published:01/09/2008
555 NXX Assignment Guidelines
$135.00 $270.50
Guidelines for the Administration of Telephone Numbers
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NPA Allocation Plan and Assignment Guidelines
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Carrier Indentification Code (CIC) Assignment Guidelines
$115.00 $231.59