Due to the increasing use of overlays, the map now shows only the first area code in an overlay area, with a plus sign to indicate a current or planned overlay. The only concentrated overlays, in Florida, Oregon and British Columbia, have been “unconcentrated,” expanding to cover the entirety of the original area codes. In the table below, the states are slightly out of alphabetical order to avoid breaking a state across two columns. (For more detailed information about current and future overlays, see the overlays.html page. For other area code information, check the main page.)

% concentrated overlay (new area code covers only part of old) [none remaining]
(green) overlay has not yet taken effect;
? indicates new code not yet officially confirmed
@ 321 is a separate area code for the coastal area (the “Space Coast” of Florida), but also an overlay of the inland 407 area (including Orlando and DisneyWorld)
✻ one overlay code covers multiple original code areas
§ “Boundary elimination overlay” — a previous split is undone, creating an overlay of the two existing area codes
‡ (see note below)

Now with Time Zones!

The map now shows time zones! From the second Sunday in March until the first Sunday in November each year — for example, from 2025-03-09 to 2025-11-02, and from 2026-03-08 to 2026-11-01 — most areas observe Daylight Saving Time, moving clocks forward one hour. The clock for each time zone indicates Standard Time first and then Daylight Saving Time. However, some areas do not observe DST: Hawaii, Arizona (except the Navajo Nation), Yukon, part of British Columbia, most of Saskatchewan, small parts of Ontario and Québec, Puerto Rico, the U.S. Virgin Islands, Guam, and the CNMI. These areas observe Standard Time year-round, and so are displayed with only one time on the clock. (Note that the entire state of Indiana now does observe DST.) Note also that the Aleutian Islands in extreme southwestern Alaska are in the Hawaii-Aleutian Time Zone (2:00•3:00), and a small portion of Nunavut in northern Canada is in Eastern Standard Time year-round (7:00). Note also that Mexico substantially revised its time zones in 2022; most of Mexico no longer observes DST. To convert to international notation, subtract 12 hours from the time indicated on the map; for example, Pacific Time is shown as 4:00 • 5:00, corresponding to UTC–08:00 in winter and UTC–07:00 in summer.