Where Is 645 Area Code?

Where is Area Code 645?

Area code 645 is assigned to the state of Florida, specifically as an overlay for the existing 305 and 786 area codes in the Miami-Dade County region. This overlay area includes the greater Miami metropolitan area, encompassing cities such as Miami, Miami Beach, Coral Gables, Hialeah, Homestead, and others that already use 305 and 786. 

To confirm coverage and details about this numbering plan area (NPA), official information is available from:

• North American Numbering Plan Administrator (NANPA)

    NANPA Mailing Address   
    One Tower Center Boulevard   
    Suite 800   
    East Brunswick, NJ 08816

   
    NANPA Customer Support   
    Tel: 1-866-623-2282   
    Email: support@nanpa.com   
    Fax: 571-363-3838 

    North American Numbering Plan Administrator

Further information and updates are also published by:

• Florida Public Service Commission
  2540 Shumard Oak Blvd., Tallahassee, FL 32399-0850
  Phone: 1-800-342-3552
  Florida Public Service Commission (PSC)

What time zone is 645 area code in the USA?

Area code 645 is in the Eastern Time Zone of the United States. All telephone numbers assigned to area code 645 observe Eastern Standard Time (EST), switching to Eastern Daylight Time (EDT) during daylight saving periods.

For time zone information and official maps, you can reference:

• National Institute of Standards and Technology (NIST)
  100 Bureau Drive, Gaithersburg, MD 20899
  Phone: 301-975-6478
  NIST – Time Zone Map

History of the 645 Area Code

Area code 645 was officially approved and designated as an overlay code for the 305/786 area codes by the Florida Public Service Commission (PSC) and the North American Numbering Plan Administrator (NANPA). The request for a new area code was prompted by the rapid exhaustion of available number combinations in the 305/786 region due to population growth and increased demand for mobile and internet-based lines.

Key historical milestones:

Unlike a split, where a new area code is carved out for a distinct region, an overlay allows all numbers within the same geographical region to be assigned any of the codes (305, 786, or 645). Existing customers retain their numbers; only new lines are assigned the 645 prefix. 

How Many People Use the 645 Area Code?

The precise number of users assigned to area code 645 is still evolving because it is a new overlay, and most Miami-Dade-region numbers are still issued under 305 or 786. According to NANPA and PSC projections, the Miami-Dade region has a population of over 2.7 million (U.S. Census), but only recently has 645 begun appearing in new number assignment. Over time, usage of 645 will increase as the pool of available numbers in 305 and 786 is depleted.

For verified assignment statistics and projections, please contact:

• North American Numbering Plan Administrator (NANPA)
  Phone: 866-623-2282
• Florida Public Service Commission (PSC)
  Phone: 1-800-342-3552

Is the 645 Area Code Toll-Free?

No, area code 645 is not a toll-free code. It is a geographic area code assigned to Miami-Dade County and surrounding neighborhoods. Calls to or from 645 numbers are subject to local or long-distance charges, as determined by your telephone carrier.

Toll-free area codes in the United States (for reference only):

• 800
• 833
• 844
• 855
• 866
• 877
• 888

For more information about toll-free numbers and area code assignments, see:

• Federal Communications Commission (FCC)
  45 L Street NE, Washington, DC 20554
  Federal Communications Commission (FCC)