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The Alliance for Telecommunications Industry Solutions, 05/01/2009
Publisher: ATIS
File Format: PDF
$127.00$255.94
Published:01/05/2009
Pages:90
555 NXX Assignment Guidelines
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International Inbound NPA Assignment Guidelines
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Thousands-Block Number (NXX-X) Pooling Administration Guidelines (TBPAG)
$120.00 $241.78
CENTRAL OFFICE CODE (NXX) ASSIGNMENT GUIDELINES (COCAG)
$124.00 $248.79