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Date: 2016-07-20 10:12:15Telephone numbers North American Numbering Plan Numbering Resource Utilization/Forecast Report Local number portability | Below is a list of helpful tips to assist new service providers in getting started with the central office code request process. Read the following INC guidelines located on the ATIS website at http://www.atis.org/01Add to Reading ListSource URL: www.nationalnanpa.comDownload Document from Source WebsiteFile Size: 182,96 KBShare Document on Facebook |