As A Number Format
As the familiarity of overlay plans and 10-digit-dialing required areas has increased, the phrase "10-digit dialing" is now sometimes used to describe the normal inclusion of area code in long-distance dialing.
Read more about this topic: Ten-digit Dialing
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“He is the richest man who knows how to draw a benefit from the labors of the greatest number of men, of men in distant countries, and in past times.”
—Ralph Waldo Emerson (1803–1882)