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The 645 area code covers the same area as 305, including Miami, North Port and 1 more place in Florida.

Area code 645 is in Florida, on Eastern Time. In the 645 area, phone numbers are given out most in Miami-Dade County, then Sarasota County. It has been in service since August 4, 2023. 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
August 4, 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, the city and state on the listing, and whether it is a mobile, landline or VoIP line. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup.

Works for US & Canada numbers. Enter a 10-digit number, e.g. (415) 555-0132.

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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%
One dot per US area code; 645 is the ringed one.

Each prefix, or block of 1,000 numbers inside it, is also handed to a carrier. A number keeps its digits when its owner switches carrier, so the prefix no longer tells you who carries it today. Our free carrier lookup shows which carrier a 645 number is on now.

645 started in 2023 as an overlay on 305, and its ground has not changed since.

  1. 2023

    645 starts on August 4, 2023, 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.

  1. Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
  2. Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
  3. 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.
  4. Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.

The area codes closest to 645 are 954, 239 and 561.

This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.

954 / 754Fort Lauderdale, FL239Fort Myers, FL561 / 728West Palm Beach, FL941Sarasota, FL772Port Saint Lucie, FL863Lakeland, FL

Florida has 22 other area codes.

239Fort Myers305Miami321Cocoa324Jacksonville352Gainesville386Daytona Beach407Orlando448Tallahassee561West Palm Beach656Tampa689Orlando727Clearwater728West Palm Beach754Fort Lauderdale772Port Saint Lucie786Miami813Tampa850Tallahassee863Lakeland904Jacksonville941Sarasota954Fort Lauderdale

Browse every US area code

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 the 645 area, phone numbers are given out most in Miami-Dade County, then Sarasota County.

What state is area code 645 in?

Florida. 645 is a Florida area code on Eastern Time.

What cities use area code 645?

The places holding the most 645 prefixes are Miami, North Port and Homestead. The count comes from NANPA's prefix assignments as of October 1, 2026.

What time zone is area code 645 in?

645 is on Eastern Time.

When did area code 645 start?

645 went into service on August 4, 2023, as an overlay on 305: new numbers for the same area.

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.

Is 645 a toll-free number?

No. 645 is a regular area code for Miami and North Port in Florida, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.

What area codes are near 645?

The closest are 954/754 (Fort Lauderdale, Florida), 239 (Fort Myers, Florida), 561/728 (West Palm Beach, Florida) and 941 (Sarasota, Florida), measured between the centres of each area.

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.