Few area codes are as culturally iconic as Miami’s “305.” But the Magic City now juggles three overlapping codes across Miami-Dade County as demand for new phone lines keeps climbing. This guide breaks down every Miami area code, explains the mandatory 10-digit dialing rules, lists the major ZIP codes, and flags the scam calls most common across South Florida.
Miami Area Codes at a Glance
| Detail | Information |
|---|---|
| Primary Area Code(s) | 305 / 786 |
| Overlay Area Code(s) | 645 |
| Time Zone | Eastern Time (ET) – EST / EDT |
| Major County | Miami-Dade County |
| Dialing Format | 10-digit dialing required |
Area Code Breakdown & District Mapping
305 – Miami-Dade Original Code
Area code 305 is one of Florida’s original 1947 area codes and is synonymous with Miami itself — “the 305” is a cultural badge across Miami-Dade County. It covers the entire county plus the Florida Keys.
786 – Miami-Dade Overlay
Area code 786 arrived in 1998 as the first overlay for Miami-Dade, sharing the exact same geography as 305. New lines across Miami, Miami Beach, and Hialeah are commonly issued 786 numbers.
645 – Newest Miami-Dade Overlay
Area code 645 is the newest overlay for the 305/786 region, adding fresh numbering capacity for the fast-growing Miami-Dade market. It carries no separate geography — a 645 number is just as local as a 305 number.
Neighborhoods & Local Coverage
The 305/786/645 codes cover all of Miami-Dade, from the skyscrapers of Downtown and Brickell to the art-filled streets of Wynwood and the Design District. Cultural hubs like Little Havana, Little Haiti, and Coral Way sit alongside waterfront enclaves such as Coconut Grove, giving the same area codes an enormous demographic range.
Beyond the urban core, the codes reach Miami Beach across the causeways, the suburban sprawl toward Kendall and Doral, and historically significant communities like Overtown and Liberty City. With more than 2.6 million residents, Miami-Dade is one of the densest numbering areas in the Southeast, which is exactly why it now needs three overlapping codes.
Local Dialing Rules & International Format
Miami-Dade has required 10-digit dialing since the 786 overlay launched, and the addition of 645 makes it mandatory: you must dial the area code plus the 7-digit number for every local call. Seven-digit dialing does not work anywhere in the county.
To call Miami from outside the United States, dial your country’s exit code, then the U.S. country code +1, followed by the 10-digit number (for example, +1 305 XXX-XXXX). From inside the U.S. and Canada, simply dial 1 before the 10-digit number for long-distance calls.
Major ZIP Codes Covered
The 305 / 786 service area spans many of Miami’s core ZIP codes, including 33101, 33125, 33127, 33130, 33131, 33133, 33134, 33139, 33142, 33145, and 33176.
Spam & Scam Call Warnings in Miami
Miami is a frequent target of neighbor-spoofing robocalls that fake a local 305 or 786 prefix. Residents also report bilingual scam calls impersonating utilities, immigration officials, and banks — often in both English and Spanish.
| Scam Type | What to Watch For |
|---|---|
| Neighbor Spoofing | Calls that mimic a local 305 prefix to look familiar. |
| Utility / Toll Scams | Threats to shut off power or demand toll payment via gift cards. |
| IRS / Immigration | Robocalls claiming legal action — government agencies never call to demand instant payment. |
Red flag: Any caller who pressures you to pay immediately with gift cards, wire transfers, or cryptocurrency is almost certainly running a scam. Hang up and verify through an official number.
↑ See the complete list of All US Area Codes by State for every code across the country.
Nearby & Related Florida Cities
Frequently Asked Questions
What area code is Miami, FL?
Miami uses three area codes for Miami-Dade County: the original 305, plus overlays 786 and 645.
Is 645 a real Miami area code?
Yes. 645 is the newest overlay assigned to the 305/786 region, expanding number capacity across Miami-Dade.
Why does Miami have three area codes?
Miami-Dade’s population and demand for new phone lines exhausted 305 and 786, so 645 was added as a third overlay covering the same territory.
Do I need to dial 10 digits in Miami?
Yes. All local calls in Miami-Dade require 10-digit dialing (area code + number).
Stay Safe & Explore More
- Verify an unknown caller in our Scam Alerts directory.
- Comparing nationwide numbers? See our Toll-Free Numbers guides.