Miami is served by 3 active area codes as of 2026, layered through decades of overlays and splits across the metro area. This guide walks through which code covers which part of the region, why so many codes are needed, and what new codes may come next.
The Short Answer
Miami currently has 3 active area codes in service. The count reflects a combination of population growth, the rise of mobile lines, and the way modern numbering allocates blocks — every line activated, whether a cellphone, a business desk line, a VoIP number, or a connected device, consumes a slot in the pool.
Miami has roughly 2,838,461 residents as of the most recent estimates. That population, combined with the spread of mobile and VoIP lines per household, determines how often new area codes are needed.
The Full List of Miami Area Codes
The active area codes serving Miami are listed below, in numerical order. Where a code is an overlay or a split-off from an earlier code, that relationship is noted.
- 305 — Miami-Dade County and the Florida Keys
- 786 — Miami-Dade County and the Florida Keys (overlay of 305)
- 645 — Miami-Dade County and the Florida Keys (overlay of 305 and 786)
How Miami’s Area Codes Grew Over Time
Miami received its first area code, 305, when the North American Numbering Plan launched in 1947. That single code initially covered the entire state, and subsequent splits and overlays narrowed it over the decades that followed.
Ready to Get a Miami Metro Number?
One-time fee. No monthly charges. Port to any carrier in 3–5 business days. NYC's most trusted source since 2009.
Browse Miami Metro Area Codes →- 1947 — 305 was assigned as Florida's sole area code at the launch of the North American Numbering Plan, covering the entire state including Miami.
- 1995 — 954 split off from 305 for Broward County on September 11, 1995, leaving 305 to serve Miami-Dade County and the Florida Keys.
- 1998 — 786 was added as an overlay over 305 in Miami-Dade County on March 1, 1998, after 305 neared exhaustion, requiring ten-digit dialing.
- 2001 — The Florida Keys portion of Monroe County was added to the 786 overlay on September 1, 2001.
- 2022 — The Florida Public Service Commission approved a third area code, 645, for the Miami region on February 25, 2022.
- 2023 — 645 was activated on August 4, 2023, as a second overlay over 305 and 786, ahead of the anticipated exhaust of central office codes in the existing two codes.
What’s Next for Miami Area Codes
Miami’s three codes, 305, 786, and 645, form a single overlay complex covering Miami-Dade County and the Florida Keys. 645 was activated in August 2023 specifically to head off the projected exhaust of available prefixes in 305 and 786, which was expected that same year. With the third overlay now in service, the complex has substantial runway, and the Miami numbering area is not on NANPA’s near-term relief schedule. Any future relief would take the form of an additional overlay rather than a geographic split, since splitting is no longer used in built-out metros.
Frequently Asked Questions
How many area codes does Miami have right now?
Miami has 3 active area codes in service across the territory it covers, including any overlays that share geography with an older code.
What is the oldest area code in Miami?
305 is the oldest active area code in Miami, assigned in 1947 when the North American Numbering Plan launched. It remains in service today, though its geographic footprint has typically been reduced by subsequent splits and overlays.
What is the newest area code in Miami?
The most recent area code addition to Miami was 645, activated in 2023. New phone lines provisioned in its service area are increasingly drawn from this code as older overlays approach exhaustion.
Why does Miami need so many area codes?
Population growth combined with the proliferation of mobile lines, business direct-dial numbers, VoIP services, and connected devices has exhausted older codes faster than the original 1947 plan anticipated. Each new area code adds roughly 7.9 million additional phone numbers to the regional pool.
Is 305 still a Miami area code?
Yes. 305 is the original Miami area code, dating to 1947, and it remains in active use across Miami-Dade County and the Florida Keys. Because new lines are now drawn mostly from 786 and 645, a 305 number often signals a long-tenured Miami resident or business, and the code carries enough local identity that rapper Pitbull nicknamed himself “Mr. 305.”
Do you have to dial 10 digits in Miami?
Yes. Since the 786 overlay was introduced in 1998, Miami has used mandatory ten-digit dialing, meaning you must dial the area code plus the seven-digit number for every local call. This applies across all three codes, 305, 786, and 645.
Which area code covers the Florida Keys?
The island portion of the Keys, in Monroe County, shares Miami’s codes: 305, 786, and 645. The mainland portion of Monroe County, in the Everglades, is covered by 239 instead.
Is 645 a real Miami area code?
Yes. 645 is a legitimate area code activated on August 4, 2023, as the newest overlay for Miami-Dade County and the Florida Keys. New phone numbers issued in Miami are increasingly assigned a 645 prefix, so an unfamiliar 645 call is not necessarily spam.
Ready to Get a Number in Miami?
We carry available Miami numbers right now across multiple area codes. Order directly in 305, 645, or 786 — a one-time fee, no monthly charges, with pricing From $150 depending on the digit pattern and memorability of the number. Prefer help choosing? Call us at (212) 580-2000.
