thedirectory - Area Code 405 History

Area Code 405 History - Oklahoma

Significant events for area code 405

Date
Details

1947 The original area code for Oklahoma

January 1, 1953 Area code 405 was split with 918 covering northeastern Oklahoma

January 1, 2021 Area code was 405 overlaid with 572.

Date	Details
1947	The original area code for Oklahoma
January 1, 1953	Area code 405 was split with 918 covering northeastern Oklahoma
January 1, 2021	Area code was 405 overlaid with 572.

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