Browse District of Columbia area codes and open individual area code pages for location, major cities, time zone, introduction date, overlay or related codes, and dialing information.
About District of Columbia Area Codes
Area Codes Atlas currently lists 2 published area code pages associated with District of Columbia. Use the directory above to open each code page and review its location, listed cities, time zone, introduction date, and related or overlay code information. The introduction-year data in the current directory ranges from 1947 to 2021.
Cities Listed for District of Columbia Area Codes
Cities appearing in the current District of Columbia area-code records include Washington. The exact cities vary by area code, so open an individual code page for its full city list.
Frequently Asked Questions About District of Columbia Area Codes
How many District of Columbia area codes are listed?
Area Codes Atlas currently has 2 published area code pages associated with District of Columbia.
Which cities are listed for District of Columbia area codes?
Current records include cities such as Washington. City coverage differs by area code, so use the directory above for code-specific details.
How can I find information about a specific District of Columbia area code?
Select an area code from the directory above. Each code page includes the available location, city, time zone, introduction-date, related-code, and dialing information.
Counts, cities, time zones, and introduction-year summaries on this page are generated from the current published Area Codes Atlas directory and may change as the directory is updated.