WHAT YOU NEED TO KNOW
Area code 305 serves Miami-Dade County and the Florida Keys, including Miami, Hialeah, Coral Gables, and Key West. One of the original 1947 NANP codes, it now covers approximately 2.8 million residents and operates alongside the 786 overlay, making it the primary historic code for South Florida's most densely populated and internationally recognized metro area.
- Population: ~2.8 million residents in Miami-Dade County
- Overlay: Overlay: 786 (introduced 1998)
- Dialing: 10-digit dialing required
- Source Type: Local geographic code
Geographic Coverage
Area code 305 covers all of Miami-Dade County, which includes the city of Miami and dozens of incorporated municipalities such as Hialeah, Miami Beach, Coral Gables, Doral, Miami Gardens, Homestead, and Cutler Bay. It also extends south through the Florida Keys, reaching communities such as Key Largo and Key West. The coverage area borders Broward County to the north, where area code 954 begins. Monroe County, home to the Keys, shares the 305 code.
Population and Business Context
Miami-Dade County is one of the most populous counties in the United States, with roughly 2.8 million residents. The local economy is anchored by international trade, tourism, real estate, finance, healthcare, and media. Miami serves as a gateway city for Latin American commerce, and a large share of businesses in the 305 area code conduct operations in both English and Spanish. The port of Miami is one of the busiest cruise ports in the world.
Area Code History
Area code 305 was assigned in 1947 as one of the original 86 North American Numbering Plan codes. At that time, it covered all of Florida. As population grew, the state was divided multiple times. In 1995, area code 954 was split off to serve Broward County. In 1998, area code 786 was introduced as an overlay for Miami-Dade County and the Keys, meaning both 305 and 786 now serve the same geographic region and 10-digit dialing became mandatory.
How to Dial
Because area code 305 operates with the 786 overlay, all local calls within the region require 10-digit dialing, meaning you must dial the full area code plus the seven-digit number even for local calls. You do not need to dial a leading 1 for local calls, but long-distance calls outside the region follow the standard 1 plus 10-digit format. Cell phones and VoIP services in the area may carry either a 305 or 786 prefix.
Need a 305 Number for Your Miami Business?
Businesses operating in Miami-Dade County and the Florida Keys can acquire a 305 local number through Convirza. Whether you run a single-location shop in Coral Gables or manage a multi-site operation across the metro, Convirza provisions trackable local numbers in any North American area code, including 305, so your business appears rooted in the communities you serve. Every call to your 305 number is automatically scored, recorded, and source-attributed using dynamic number insertion (DNI), which tells you exactly which campaign, keyword, or channel drove each inbound call. Calls can be routed to any team member, department, or physical location, giving you full control over how South Florida customers reach you.
750+ customers · 25 years of call data