Direct answer
Area code 305 serves Miami-Dade County and Monroe County, including the Florida Keys in Florida. It is in the Eastern Time, and ten-digit dialing is required there.
Facts
| Area code | 305 |
| State | Florida (FL) |
| Region | Miami-Dade County and Monroe County, including the Florida Keys |
| Time zone | Eastern Time |
| Overlays | 305/786/645 |
| In service since | 1947 (NANPA tool date: 1 January 1947) |
| Dialing rule | Yes — ten-digit dialing is required in this overlay area. |
Areas covered
The 305 footprint covers Miami, Hialeah, Miami Beach, Coral Gables, Doral, Kendall, Homestead, North Miami, Aventura, and Key West and other Keys communities. That list describes the area the code serves today, not the larger territory it may have covered when it was first assigned. Florida is split between Eastern and Central time, but the 305 footprint is Eastern only. Callers in this area should always dial the full ten-digit number, including the area code, even for a local call.
History
Area code 305 is an original 1947 code and was Florida’s only code at launch, covering the whole state until 1953. Later splits, including Broward County’s 954 in 1995, narrowed 305 to Miami-Dade County and the Florida Keys. Area code 786 was added in March 1998 as Florida’s first overlay. NANPA Planning Letter PL-468 explains the Keys extension: permissive ten-digit dialing in the expansion area had been in place since August 2001, the Florida Public Service Commission approved the expansion into Monroe County in July 2014, mandatory ten-digit dialing began on 18 April 2015, and the earliest new 786 code in the Keys rate centre was activated on 1 June 2015. Area code 645 was added in August 2023.
Dialing
Dialing rule: Yes — ten-digit dialing is required in this overlay area. The reason is the overlay structure in the facts table above, except where this page states a different reason, as it does for 616. From outside the United States, the country code for the United States is 1, followed by the area code and the local number. This page explains the area code only; it does not identify who owns a number or where a phone is.
Calls and spoofing
A call that shows a familiar area code is not proof of who is calling. Caller ID can be spoofed, so a number that looks local may come from anywhere. Do not share personal or financial details because of the number on the screen, and hang up and call back on a number you trust if a caller asks for money, codes, or account access. This site does not identify callers or phone owners, and it does not list reported spam numbers.
Related codes
786, 645 (overlays).
Frequently asked questions
Where is 305 area code?
Area code 305 is in Florida, covering Miami-Dade County and Monroe County, including the Florida Keys. It does not cover the whole state.
What time zone is 305 area code?
Area code 305 is in the Eastern Time. Florida is split between Eastern and Central time, but the 305 footprint is entirely Eastern.
What area codes overlay 305?
The overlay codes for 305 are 786; 645. The full overlay group is 305/786/645. New numbers in the same territory can carry any code in the group.
Is 305 area code a scam?
No area code is itself a scam. Scammers can spoof any area code, including this one, so judge a call by what the caller asks for, not by the number shown. This site does not identify callers.
When did 305 area code go into service?
Area code 305 has been in service since 1947 (NANPA tool date: 1 January 1947).
Sources
NANPA area code search; NANPA Planning Letter PL-468; Florida Public Service Commission material cited in secondary guides
Based on a recent search of NANPA and official sources.
This website provides general information about North American area codes, compiled from public sources including NANPA. It is not affiliated with or endorsed by the FCC, NANPA or any telephone carrier. Area code details can change; confirm with your carrier or the official NANPA website. This site does not identify callers or phone owners.