Area Code 843: Get a Charleston Phone Number

843 · Charleston

What is the area code for Charleston?

The area code for Charleston, South Carolina is 843, with overlay code 854 sharing the same geographic footprint. The 843 area code is a North American Numbering Plan geographic code assigned in 1998, covering the Coastal South Carolina region. It serves approximately 1,200,000 residents on the Eastern Time (ET) (UTC-5 / UTC-4 DST).

The 843 area code has 784 assigned central-office prefixes (NXX codes, the three digits after the area code) across 92 rate centers, with numbers allocated to roughly 58 carriers.

At 784 of the ~792 usable central-office prefixes, the 843 area code has about 99% of its numbering capacity assigned, and that near-exhaustion is part of why overlay code 854 was added to the region. See how 843 compares in our NXX prefix allocation analysis across 338 US area codes. (Prefix data: localcallingguide.com / NANPA, 2026.)

Where is area code 843? Location and map area

Area code 843 is located in South Carolina, the United States. Its coverage area centers on Charleston and spans the Coastal South Carolina region. If you received a call from a 843 number, the caller's number was assigned in this area — though with number porting and virtual numbers, the person may be calling from anywhere.

The 843 location sits in Eastern Time (ET), so local business hours run roughly 9 a.m.–5 p.m. ET. Neighboring South Carolina area codes include 803, 864, 821.

All Charleston area codes

Charleston is served by 2 area codes across the metro area. 843 is the 1998 addition; the others were added as overlays or for surrounding suburbs.

• 843 (current page) — Overlay on the same metro, assigned 1998
• 854 — Charleston — assigned 2015

Cities served by the 843 area code

The 843 area code covers 6 major cities and towns across the Coastal South Carolina region (SC):

Businesses across Charleston and surrounding cities use 843 numbers to project local presence and lift call answer rates. Industry studies of local presence dialing consistently report answer-rate gains of 20–40% over toll-free or out-of-area numbers — a caller ID that matches the recipient's region looks familiar and gets picked up.

843 area code time zone and business hours

The 843 area code is in the Eastern Time (ET) zone (UTC-5 / UTC-4 DST). Standard business hours in 843 run 9 AM to 5 PM ET.

If you're calling into 843 from a different time zone, factor in the offset. For example, an Eastern Time business calling 843 at 9 AM ET reaches Charleston at local time — likely outside standard business hours.

History of the 843 area code

The 843 area code was introduced in 1998 when the North American Numbering Plan was first deployed. As Charleston grew and number demand increased, overlay code 854 was added to serve the same geographic region — a common solution that avoids forcing existing subscribers to change their numbers.

• 1998 843 entered service
• 2015 854 added to serve the same region

Is the 843 area code safe? Spam and scam calls

843 is a legitimate geographic area code for Charleston — it is not a scam code or a premium-rate prefix, and a call from a 843 number is most likely a genuine local caller. The risk is not the area code itself but a tactic called neighbor spoofing: scammers fake their caller ID so an unwanted call appears to come from your own area code, because people answer familiar numbers more readily.

If you get an unexpected 843 call, a few signals point to a likely scam — a pre-recorded message, urgent pressure to act now, a demand for payment by gift card or wire transfer, or anyone asking for passwords, Social Security, or account numbers. Let suspicious calls go to voicemail, never share personal information, and report fraud to the FTC at reportfraud.ftc.gov.

The FCC consumer guide on spoofing explains your rights under the Truth in Caller ID Act. A real Charleston business will leave a clear voicemail and will not pressure you.

US carriers verify caller ID with the STIR/SHAKEN framework, which flags many spoofed numbers as "Spam Likely" before they ring. DialPhone 843 numbers are registered for STIR/SHAKEN attestation, so calls from your business are verified as genuine and reach customers without a false spam label. See the DialPhone guide to VoIP security for more.

Why get a 843 area code number for your business?

Getting a 843 number gives your business three measurable advantages over a toll-free or out-of-area number:

1. Local trust signal. Customers in Charleston recognize 843 as their home area code. Caller ID matching builds immediate credibility for service businesses, sales outreach, and patient communication.
2. Higher answer rate. Calls from a familiar local area code are answered far more often than unknown or toll-free numbers — industry measurements of local presence dialing put the lift at 20–40%, which matters most for outbound sales, appointment confirmations, and time-sensitive service callbacks.
3. Targeted marketing. Businesses serving Charleston and the broader Coastal South Carolina can advertise a local number across print, radio, billboards, and digital channels for higher conversion than a national 800 number.

For businesses in Charleston and surrounding cities, top industries that benefit from local 843 presence include Professional Services, Healthcare, and Retail. DialPhone's AI receptionist is available for every 843 number — never miss a call, even after standard business hours.

How to get a 843 area code number

Setting up a 843 business number with DialPhone takes under 10 minutes:

1. Sign up for a DialPhone plan. Choose any plan starting at $24/user/month. Free 14-day trial, no credit card required.
2. Search available 843 numbers. Filter the DialPhone number inventory by area code, city, or pattern.
3. Choose your number and configure. Assign your new 843 number to a user or team, set up call routing, voicemail, AI receptionist, and business SMS.
4. Port your existing number (optional). Already have a 843 number? Free number porting in 2 to 5 business days with zero service interruption.

New to local numbers? The complete guide to getting a local phone number covers choosing the right area code, porting an existing line, and avoiding spam flags.

843 area code overlay codes

The Coastal South Carolina region is served by multiple overlay area codes:

Area Code	Coverage
843	Primary area code for Coastal South Carolina, assigned 1998
854	Overlay — same geography (assigned 2015)

All overlay codes serve the same Charleston region. New subscribers may be assigned any available code; existing numbers retain their original prefix.

AI receptionist for 843 area code businesses

Every DialPhone 843 number includes optional AI receptionist coverage, available 24/7. The AI handles calls when your team is unavailable — answering common questions, booking appointments, routing urgent callers to on-call staff, and capturing voicemail with full transcription and intent tagging.

For businesses in Charleston that handle high call volume, run extended hours, or need bilingual support (especially valuable in service areas with diverse customer bases), the AI receptionist reduces voicemail backlog and improves first-call resolution.

All area codes in South Carolina

South Carolina has 6 active geographic area codes. The 843 area code is part of the same numbering plan as the codes listed below — calls between them are typically local within the state, depending on the carrier.

Nearby area codes

Related area codes in South Carolina and the Eastern Time (ET) region:

• 803 area code — Columbia, South Carolina
• 864 area code — Greenville, South Carolina
• 821 area code — Greenville, South Carolina
• 839 area code — Columbia, South Carolina
• 854 area code — Charleston, South Carolina
• 201 area code — Jersey City, New Jersey

All South Carolina area codes → · Browse all US area codes →

More area codes: ← 840 San Bernardino · 845 Poughkeepsie →

How this page is verified

DialPhone re-verifies every area code page every 90 days. Area code geography, timezone, and overlay data come from the official North American Numbering Plan Administration (NANPA) database. Pricing reflects the published DialPhone plan tiers — see the pricing page for current details. Number availability varies; check the DialPhone signup flow for live inventory in the 843 region.

What to know before getting a 843 number

• Number availability is finite. Popular Charleston area codes can be inventory-constrained — request specific vanity patterns early.
• Porting timing varies. Most 843 ports complete in 2-5 business days; complex multi-line legacy contracts can take 7-10.
• HIPAA tier required for healthcare. The Core $24 plan doesn't include a BAA — healthcare users need Advanced ($34) or above.