NANPA : North American Numbering Plan Adminstration - About Us - Dave's Blog

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NANPA : North American Numbering Plan Adminstration - About Us

2008 Jun 26, 5:43A bit of history on US phone numbers from the source: "AT&T developed the North American Numbering Plan in 1947 to simplify and facilitate direct dialing of long distance calls. Implementation of the plan began in 1951."PermalinkCommentsphone att phone-numbers reference
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