Telecommunications-related introductions in 1947
1
Area_code_323
1
Area_code_913
3
Area_code_380
3
Area_code_412
3
Area_code_419
3
Area_code_571
3
Area_code_786
3
Area_code_901
3
Area_codes_415_and_628
3
North_American_Numbering_Plan
11
Area_code_207
11
Area_code_304
11
Area_code_305
11
Area_code_312
11
Area_code_313
11
Area_code_315
11
Area_code_402
11
Area_code_501
11
Area_code_515
11
Area_code_518
11
Area_code_601
11
Area_code_603
11
Area_code_605
11
Area_code_616
11
Area_code_645
11
Area_code_712
11
Area_code_769
11
Area_code_779
11
Area_code_815
11
Area_code_914
11
Area_code_915
11
Area_code_945
11
Area_codes_203_and_475
11
Area_codes_205_and_659
11
Area_codes_208_and_986
11
Area_codes_212,_646,_and_332
11
Area_codes_213_and_323
11
Area_codes_214,_469,_972,_and_945
11
Area_codes_301,_240,_and_227
11
Area_codes_301_and_240
11
Area_codes_385_and_801
11
Area_codes_518_and_838
11
Area_codes_601_and_769