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The Alliance for Telecommunications Industry Solutions, 01/21/2016
Publisher: ATIS
File Format: PDF
$132.00$265.98
Published:21/01/2016
Thousands-Block Number (NXX-X) Pooling Administration Guidelines
$130.00 $260.64
CENTRAL OFFICE CODE (NXX) ASSIGNMENT GUIDELINES (COCAG)
$117.00 $235.18
NPA Code Relief Planning and Notification Guidelines
$136.00 $273.98
Personal Communications Services (PCS) 5YY NXX Code Assignment guidelines
$116.00 $233.76