Area code 645 covers Miami and surrounding areas in Florida. It was activated in 2023 as an overlay of area code 305. Today it shares its territory with overlay codes 305 and 786. For the full picture, see all Florida area codes.
| State | Florida |
|---|---|
| Primary city | Miami |
| Cities also served | Miami, Hialeah, Miami Beach, Miami Gardens, Homestead, Kendall, Key West, Marathon |
| Time zone | Eastern (UTC-5 / UTC-4 DST) |
| Year established | August 4, 2023 |
| Original 1947 NPA? | No |
| Parent code | 305 |
| Overlay codes | 305, 786 |
| Currently in use? | Yes, actively assigned |
| Ten-digit dialing required? | Yes |
645 as an Overlay of 305
Area code 645 is an overlay of area code 305, meaning the two codes share the exact same geographic territory in Miami-Dade County and the Florida Keys (Monroe County). When 645 was activated in August 4, 2023, all existing 305 phone numbers stayed unchanged. New phone lines in the region may now be assigned either 305 or 645, and ten-digit dialing is required for all local calls. For the full history of the area, its cities, and what these codes mean culturally, see our page on area code 305.
Cities Served by Area Code 645
Area code 645 serves Miami-Dade County and the Florida Keys (Monroe County), including the following cities and communities:
- Miami
- Hialeah
- Miami Beach
- Miami Gardens
- Homestead
- Kendall
- Key West
- Marathon
Nearby area codes covering the same broader region include: 305, 786.
How to Get a 645 Phone Number
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Browse 645 Numbers →There are three ways to get a phone number with the 645 area code, each suited to a different need:
- Buy from a premium-number specialist. Companies that hold curated inventories of specific area codes can sell you a 645 number directly, often with a one-time fee and ownership transferred to you (no recurring carrier fees). This is the option for picking a specific memorable number, or for getting an area code that most carriers won’t let you request. Browse our 645 inventory.
- Sign up with a VoIP carrier. Voice-over-IP services (such as Google Voice, OpenPhone, Grasshopper, and many others) can typically provision a 645 number on request, especially for active overlay codes. You won’t usually get to pick the specific number, but you’ll get a working line in the area code. This is the cheapest option for anyone who doesn’t need a particular number.
- Port an existing 645 number. If you already have a 645 phone number with another carrier, you can transfer it (port it) to a new service provider while keeping the number. This works for landlines, cell phones, and VoIP services, though landlines outside of Florida sometimes can’t accept inbound ports of 645 numbers due to 911 routing rules.
Looking for a 645 number? 212areacode.com offers premium 645 numbers for Miami, Florida — choose your number, port it to any carrier in 3–5 business days, and pay a one-time fee with no monthly charges. Browse available 645 numbers →
Frequently Asked Questions
Is the 645 area code still in use?
Yes. 645 is actively assigned to new phone lines in Miami-Dade County and the Florida Keys (Monroe County).
What is the difference between 645 and 305?
Today they share the same geographic territory in Florida. New phone lines in the area may be assigned either code. The two codes work identically for calling, billing, and service.
What is the parent area code of 645?
Area code 645 is an overlay of 305. Both codes serve the same region of Florida.
Can I get a 645 number if I don't live in Florida?
Yes. Phone numbers are no longer tied to a physical address. With VoIP service or a number broker, you can hold a 645 number from anywhere in the world. The number routes to whatever device or carrier you specify.
Is 645 a scam area code?
No. 645 is a legitimate, active area code for Miami-Dade County and the Florida Keys (Monroe County). Like any area code, scammers occasionally spoof 645 caller IDs, but the code itself is heavily used by real Florida businesses, government offices, and residents.
When did area code 645 go into service?
Area code 645 was activated on August 4, 2023, making it one of the newest codes in the United States.
What area does the 645 area code cover?
The 645 area code covers Miami-Dade County and the Florida Keys portion of Monroe County, overlaying the existing 305 and 786 area codes.
Why was the 645 area code created?
It was created as an all-services overlay to relieve number exhaustion in the 305 and 786 area codes, which were running low due to South Florida’s rapid population and business growth.
Do I need to dial 10 digits to call a 645 number?
Yes. Because 645 is an overlay sharing the same geography as 305 and 786, all local calls in the region require 10-digit dialing — the area code plus the seven-digit number.
Related Reading
- Who Invented Area Codes?
- Why Use Area Codes For Local Calls?
- What States Have the Most Area Codes?
- Most Desirable Area Codes
See where it sits in the full US area code directory.
