The 645 area code covers the same area as 305, including Miami, North Port and 1 more place in Florida.
645 has been in service since 2023, on Eastern Time. 305 and 786 cover the same area, so two neighbours can have different area codes.
- Where
- Miami-Dade County and Sarasota County, Florida
- Time zone
- Eastern Time
- In service since
- 2023
- Shares its area with
- 305 (since 1947) and 786 (since 1998)
- Prefixes in use
- 78
- How to dial
- Local calls need all 10 digits: 645-555-0142.
Find out who called you from a 645 number.
Enter the full 10-digit number to see who it is listed to, where it is registered, and whether it is a mobile, landline or VoIP line.
Miami holds 49% of the phone prefixes in area code 645.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 78 prefixes in use shows where 645 numbers are actually given out.
- Miami38 prefixes, 49%
- North Port14 prefixes, 18%
- Homestead9 prefixes, 12%
645 started in 2023 as an overlay on 305, and its ground has not changed since.
2023
645 starts as an overlay on 305: new numbers on the same ground.
A 645 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
Florida has 22 other area codes.
These are the questions people ask most about area code 645.
Where is area code 645?
645 covers Miami, North Port and Homestead in Florida, in Miami-Dade County and Sarasota County.
What time zone is area code 645 in?
645 is on Eastern Time.
Is 645 the same area as 305 and 786?
Yes. 305 (since 1947) and 786 (since 1998) cover the same ground as 645. Nobody's number changed when they were added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 645 number?
Local calls need all 10 digits: 645-555-0142.
Who called me from a 645 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 645 a scam?
645 is a real Florida area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.