645 Area CodeMiami, FL
Area code 645 covers Miami and nearby communities in Florida, in the Eastern Time (ET) zone, home to about 2.7 million people across 86 cities. It overlays 305 and 786, so the region uses several codes and every local call needs all ten digits.
Overview
- Major City
- Miami
- State
- Florida (FL)
- Timezone
- Eastern Time (ET)
- Current Time
- Overlay
- Yes – shares area with 305, 786
Overview of the 645 Area Code
What is the 645 area code?
The 645 area code serves Miami, Florida, alongside other established area codes. When you see a 645 number, it indicates a local number within this geographic area.
Why was area code 645 created?
The 645 area code was introduced as an overlay to add numbers in Miami once the existing area codes 305 and 786 began to run out of available prefixes. It added a new supply of numbers without requiring current residents to change their existing digits.
Geographic Coverage of the 645 Area Code
The 645 area code serves Miami and surrounding areas in Florida. It operates within the Eastern Time (ET) time zone. It complements the coverage of area codes 305 and 786. This area code covers several key cities, including:
- Miami
- Hialeah
- Miramar
- Miami Gardens
- Homestead
- Doral
Got a call from a 645 number? It came from Miami, FL. Since 645 overlays with 305 and 786, every local call in the region needs all ten digits to land on the right line. Inside 645, Miami holds about 18% of the population; the rest is split across 85 smaller cities.
Miami Area Codes Overview
Miami is served by multiple area codes, reflecting its telecommunications needs. The 645 area code operates alongside 305, 786. Here are the area codes serving this region:
The introduction of the 645 area code helped prevent number exhaustion, ensuring a continuous supply of phone numbers across the geographic area.
What cities does area code 645 cover?
| City | State | Population | % of Area Code | % of City |
|---|---|---|---|---|
| Miami | FL | 487,014 | 1% | 85% |
| Hialeah | FL | 235,388 | 0% | 100% |
| Miramar | FL | 143,242 | 0% | 8% |
| Miami Gardens | FL | 116,173 | 0% | 100% |
| Homestead | FL | 85,796 | 0% | 100% |
| Doral | FL | 83,625 | 0% | 100% |
| Miami Beach | FL | 83,251 | 0% | 97% |
| Kendall | FL | 75,371 | 0% | 100% |
| North Miami | FL | 62,202 | 0% | 100% |
| Fountainebleau | FL | 59,764 | 0% | 100% |
* Sources: Population – U.S. Census Bureau PEP, Vintage 2024 (SUB-IP-EST2024-POP). Area code assignments – NANPA CO Code data. See our data methodology.
Has area code 645 been reported for unwanted calls?
Yes – 100 unwanted-call complaints were reported to the FTC for numbers showing a 645 area code (May 29 – Jul 2, 2026).
- 59% robocalls
- ↑ 8% vs prior period
Most-reported subjects
- Other35%35
- Calls pretending to be government, businesses, or family and friends12%12
- Dropped call or no message10%10
* Caller ID is easily spoofed, so these figures reflect the number shown on caller ID, not the caller's true location – an area code alone never identifies a caller. The FTC does not verify the facts in these complaints. Source: FTC Do Not Call (DNC) Reported Calls Data, retrieved 2026-07-05.
Frequently Asked Questions about the 645 Area Code
Who called me from a 645 number?
A 645 number is assigned to Miami, Florida, so a call may come from there. But caller ID is easy to fake, and scammers often spoof a local 645 code to look nearby, so a 645 number doesn't prove the caller is local. Recently, 100 unwanted-call complaints were reported to the FTC for numbers showing the 645 code (59% flagged as robocalls). If you don't recognize the number, let it go to voicemail; a real caller will leave a message.
Is 645 a scam area code?
No area code is a scam on its own. 645 is a normal, officially assigned code for Miami, Florida. Spam callers spoof local codes to raise the odds you answer, so 645 on your caller ID says nothing about who is really calling. Recently, 100 unwanted-call complaints were reported to the FTC for numbers showing the 645 code (59% flagged as robocalls). Judge the call itself, not the area code.
Why do I keep getting calls from the 645 area code?
Repeated calls from different 645 numbers are usually spoofing: a robocaller rotates through 645 numbers so each call looks local and slips past simple blocks. Recently, 100 unwanted-call complaints were reported to the FTC for numbers showing the 645 code (59% flagged as robocalls). Blocking one number rarely helps; voicemail screening, your carrier spam filter, and the Do Not Call Registry work better.
Should I answer an unknown 645 number?
If you aren't expecting a 645 call, let it ring to voicemail. Legitimate callers leave a message, most robocallers hang up when no one picks up, and answering can mark your number as active and bring more calls.
How do I block calls from the 645 area code?
Block a single 645 number from your recent-calls list (iPhone: tap the number, then Block this Caller; Android: tap the number, then Block or report spam). To cut the volume, turn on Silence Unknown Callers on iPhone or spam protection on Android, enable spam filtering from your carrier, and register at DoNotCall.gov. Blocking the entire 645 code also stops legitimate local calls, so use it only as a last resort.
Where is area code 645?
Area code 645 covers Miami and the surrounding area in Florida, spanning 86 cities with about 2,718,784 residents. It shares its area with overlay codes 305, 786.
Is 645 a real area code?
Yes. 645 is an active code in the North American Numbering Plan, assigned by NANPA and in service for Miami, Florida. A real code can still show up on spoofed spam calls, so treat unknown 645 calls with normal caution.
What timezone is the 645 area code in?
The 645 area code is in the Eastern Time (ET). Because a number can be kept when someone moves or switches to VoIP, a specific 645 caller may not be in that zone.
How do I call a 645 number from abroad?
From outside the US, dial your country's exit code, then 1 (the US country code), then 645 and the seven-digit number. From a mobile phone you can usually just enter +1 645 followed by the number and let the phone add the exit code for you.