Yes, having been in telecom, I know way too much about this.
1951 – With the rollout of the North American Numbering Plan, direct-dial coast-to-coast telephone service begins in the United States.
@LiberalLibrarian dad worked for the phone company. one of his first jobs was traveling through the south converting candlestick phones to dial phones. he brought this home from work when I was 2 as my first toy
