Telephone exchange names
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A telephone exchange name or central office name was a distinguishing and memorable name assigned to a central office. It identified the switching system to which a telephone was connected, and facili
Face of a 1939 rotary dial showing the telephone number LA-2697, which includes the first two letters of Lakewood, New Jersey
This mid- to late-1950s telephone dial displays the name of telephone exchange Kenmore, in the South Side of Fort Wayne, Indiana. The telephone number of this station is K-9293. Since the letter K is emboldened, it was a required component of the telephone number, dialed as the digit 5, as the red lettering indicates.
Telephone numbering plan
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A telephone numbering plan is a type of numbering scheme used in a telecommunications network to assign telephone numbers to subscriber telephones or other telephony endpoints. Telephone numbers are t
Telephone exchange names
…the area was unique. These letters were mapped to the digits of the dial, which was indicated visibly on the dial's numbering plate. Several systematic telephone numbering plans existed in various communities, typically evolving over time as the subscriber base outgrew older numbering schemes. A widely used numbering plan was…
United States telephone numbers often included letter prefixes and telephone exchange names, which were more easily remembered by users than long digit sequences.