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The Alliance for Telecommunications Industry Solutions, 11/01/2020
Publisher: ATIS
File Format: PDF
$140.00$281.40
Published:01/11/2020
Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines
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North American Numbering Plan Numbering Resource Utilization/Forecast (NRUF) Reporting Guidelines
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WEA 3.0 Practical Hints for Alert Originators
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