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Area code 645

Area code 645 Miami, Florida

Area code 645 is one of the newer area codes, added in 2023 to Florida, with numbers assigned in Miami, Homestead, Florida Keys. It’s 12:11 AM there now.

State
Florida23 area codes in Florida
Time zone
Eastern12:11 AM there now
Exchanges
793 places
Overlay
305 and 786Same area, 10-digit dialing
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Where area code 645 is

Numbers in 645 are assigned to 3 places in 1 county: Miami-Dade County.

Miami has the most, 48% of the exchanges; the rest are spread across 2 other places.

  • Miami38
  • Homestead10
  • Florida Keys9

Phone companies in 645

79 blocks of numbers in 645 are held by 19 phone companies. The most belong to AT&T Mobility (17), Inteliquent (16) and Wide Voice (9).

A large share, about 65%, belongs to competitive and internet phone carriers; wireless networks hold 32% and local phone and cable companies 4%.

A block’s holder is the company it was first assigned to; numbers can move to other carriers since.

History and overlays

645 went into service in 2023, added to the area of 305.

305 (since 1947) and 786 (since 1998) share the same area, so a new number there can get any of these codes and local calls are dialed with all 10 digits.

79 new exchanges were assigned since 2021, the latest in October 2026.

Calling 645

It’s 12:11 AM Eastern time in 645 right now.

From elsewhere in the U.S., dial 1, 645 and the 7-digit number; inside the area, all 10 digits too.

Nearby area codes

Florida has 23 area codes: 239, 305, 321, 324, 352, 386, 407, 448, 561, 645, 656, 689, 727, 728, 754, 772, 786, 813, 850, 863, 904, 941 and 954.

From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.

Map of the 645 area code

Map of the 645 area code around Miami and Homestead, Florida.

Interactive map © OpenStreetMap contributors

Cities on the map

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Questions about 645

Where is area code 645?

In Florida, covering Miami, Homestead and Florida Keys across 1 county.

What time zone is 645 in?

Eastern time. It was 12:11 AM there when this page loaded.

Is 645 an overlay?

Yes. 305 and 786 serve the same area, so dial all 10 digits for local calls.

Which phone companies have 645 numbers?

19 companies hold blocks; the most belong to AT&T Mobility, Inteliquent and Wide Voice. About 32% of blocks are wireless.

Is 645 running out of numbers?

Not on record. 79 new exchanges have been assigned since 2021.