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
United States telephone numbers often included letter prefixes and telephone exchange names, which were more easily remembered by users than long digit sequences.
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
Telephone numbering plan
…Carrier access code Telephone exchange names List of ITU-T Recommendation E.164 assigned country codes as of 15 Dec 2016…
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.