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The Alliance for Telecommunications Industry Solutions, 10/01/2007
Publisher: ATIS
File Format: PDF
$125.00$251.03
Published:01/10/2007
555 NXX Assignment Guidelines
$126.00 $253.61
International Inbound NPA Assignment Guidelines
$108.00 $216.38
Thousands-Block Number (NXX-X) Pooling Administration Guidelines (TBPAG)
$120.00 $241.78
CENTRAL OFFICE CODE (NXX) ASSIGNMENT GUIDELINES (COCAG)
$124.00 $248.79