The 843 area code serves the eastern third and the southern coastal regions of South Carolina. It covers a vast geographic area that includes the famous Lowcountry, the tourist-heavy Grand Strand, and the Pee Dee region. Major cities located within this area code include Charleston, Myrtle Beach, Florence, Hilton Head Island, and Beaufort.

As one of the most recognizable area codes in the southeastern United States, 843 represents more than just a telecommunications prefix; it is often tied to the coastal identity and economic vibrancy of the Palmetto State.

Geographic Coverage and Primary Cities

The 843 area code encompasses several distinct regions within South Carolina, each contributing to the state's unique cultural landscape. The service area spans from the North Carolina border down to the Georgia state line along the Atlantic coast, extending inland into the agricultural heartlands of the Pee Dee region.

Major Urban Centers

Several of South Carolina’s most populous and economically significant cities reside within the 843 territory:

  • Charleston: The state’s oldest and largest city, known for its historic architecture, cobblestone streets, and massive shipping port.
  • Myrtle Beach: A global tourism destination that anchors the Grand Strand, a 60-mile string of continuous beaches.
  • Florence: A major commercial and medical hub located at the intersection of I-95 and I-20, serving as the gateway to the Pee Dee region.
  • Hilton Head Island: A world-renowned resort town known for its golf courses and eco-friendly development.
  • Mount Pleasant: One of the fastest-growing towns in the United States, located just across the Cooper River from downtown Charleston.

Counties Served

The 843 area code provides service to a total of 14 counties in South Carolina:

  1. Beaufort
  2. Berkeley
  3. Charleston
  4. Chesterfield
  5. Colleton
  6. Darlington
  7. Dillon
  8. Florence
  9. Georgetown
  10. Horry
  11. Jasper
  12. Marion
  13. Marlboro
  14. Williamsburg

History and the Implementation of the 854 Overlay

The 843 area code was officially established on March 22, 1998. It was created through a split of the 803 area code, which previously served the entire state of South Carolina. Due to the rapid population growth in the coastal areas and the sudden surge in demand for cellular devices and internet connections in the late 1990s, the 803 prefix could no longer support the volume of required telephone numbers.

The Introduction of the 854 Overlay

By 2013, projections from the North American Numbering Plan Administrator (NANPA) indicated that the 843 area code would run out of central office prefixes by 2015. To resolve this without forcing residents to change their existing phone numbers, the South Carolina Public Service Commission approved an "overlay."

In March 2015, the 854 area code was introduced. An overlay means that the new area code covers exactly the same geographic territory as the existing one. This change brought about two significant shifts for residents:

  • Mandatory 10-Digit Dialing: Starting September 19, 2015, callers within the region were required to dial all ten digits (area code + seven-digit number) for all local calls.
  • Number Assignment: New residents or businesses requesting new lines may be assigned either an 843 or an 854 number, regardless of their specific location within the coastal region.

Time Zone and Local Communication Standards

All regions served by the 843 and 854 area codes operate within the Eastern Time Zone (ET). This region follows Daylight Saving Time (DST) protocols, shifting between Eastern Standard Time (EST, UTC-5) and Eastern Daylight Time (EDT, UTC-4).

Dialing Procedures for 843/854

Because the region operates under an overlay system, the dialing rules are consistent across all devices:

  • Local Calls: You must dial the three-digit area code followed by the seven-digit phone number.
  • Long Distance Calls: For calls originating within the 843/854 region but directed elsewhere, the standard North American format of 1 + Area Code + Number applies.
  • International Calls: Standard international prefixes (011 + Country Code) are used when calling out of the United States.

Economic and Cultural Significance of the 843 Prefix

In South Carolina, the number 843 has transcended its technical function to become a local brand. Because the area code covers the state’s primary tourism drivers—Myrtle Beach and Charleston—the prefix is often associated with a high quality of life, coastal heritage, and "Southern Hospitality."

Tourism and Business Impact

The 843 region is the engine of South Carolina's tourism industry. The Grand Strand alone attracts millions of visitors annually. Businesses in the region frequently incorporate the 843 area code into their marketing materials, using it as a badge of local authenticity. From local seafood markets in Murrells Inlet to boutique law firms in downtown Charleston, the prefix serves as a unifying identifier for the eastern part of the state.

Military Presence

The 843 area code also serves several significant military installations, including:

  • Joint Base Charleston: A major Air Force and Navy facility.
  • Marine Corps Recruit Depot Parris Island: Where thousands of United States Marines are trained annually.
  • Marine Corps Air Station Beaufort: Home to several F/A-18 and F-35 squadrons.

These installations contribute heavily to the local economy and ensure a steady influx of new residents who require telecommunications services within the 843 prefix.

Summary of 843 Area Code Facts

The 843 area code remains a vital piece of infrastructure for South Carolina. It connects the historic treasures of the Lowcountry with the bustling tourism of the Grand Strand and the industrial growth of the Pee Dee region. With the 854 overlay in place, the region has sufficient numbering resources to support its continued growth for the foreseeable future.

  • Region: Eastern and Coastal South Carolina.
  • Major Cities: Charleston, Myrtle Beach, Florence, Hilton Head Island.
  • Overlay Code: 854.
  • Dialing Rule: Mandatory 10-digit dialing for local calls.
  • Time Zone: Eastern Time (UTC-5/UTC-4).

Frequently Asked Questions

What cities use the 843 area code?

Major cities include Charleston, North Charleston, Myrtle Beach, Mount Pleasant, Rock Hill, Florence, Summerville, and Goose Creek. It also serves smaller coastal communities like Pawleys Island and Edisto Beach.

Is the 843 area code the same as 854?

Yes, in terms of geography. Area code 854 is an overlay for the 843 region, meaning they both serve the exact same cities and counties.

Why do I have to dial the area code for local calls in Charleston?

Since the introduction of the 854 overlay in 2015, the Federal Communications Commission (FCC) requires 10-digit dialing in any region where two area codes serve the same area to ensure calls are routed correctly.

What time zone is area code 843?

The 843 area code is in the Eastern Time Zone, the same as New York City and Miami.