On July 28, 1923, the first telephone exchanges in Atlanta were converted to dial. Although at that time most exchanges remained manual, that can be considered the beginning of the "early dial" period in Atlanta, in which telephone numbers were set up to accommodate dialing the first two letters of an exchange name followed by a four-digit number designating the individual line. Over the succeeding years, as exchanges were converted to dial, this pattern continued until 1955.
In August 1955, some exchanges were converted to what was becoming the standard United States number dialing pattern, two letters and five digits (the first of which was considered a part of the exchange). However, for a little over a year, Atlanta constituted a mixed-pattern city, and both 2L-4N and 2L-5N numbers were the rule, depending on the exchange. (For the exchanges with 2L-5N patterns in use, see the pages covering the late dial period.
This section is organized in the same way as is each geographical section of this site: by exchange. There are two tables, which can be described as alphabetical and numeric:
|Alphabetic table of exchange names|
|Numeric table of exchange names|
|Main Atlanta page|
|Chronological periods of the Atlanta data:|
|Pre-dial period||Early dial period||Late dial period|
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Last modified September 7, 2015.