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 Date: 2014-09-11 23:27:15Telephony Identification Telephone numbering plan Seven-digit dialing Ten-digit dialing Telephone numbers North American Numbering Plan Numbers |
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Date: 2014-09-11 23:27:15Telephony Identification Telephone numbering plan Seven-digit dialing Ten-digit dialing Telephone numbers North American Numbering Plan Numbers |
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General Characteristics of Area Code Splits and Overlays