Get a local business phone number in Mount Pleasant, SC

What area code is Mount Pleasant, SC?

Mount Pleasant, in Charleston County, South Carolina, had a Census-estimated population of 95,604 in July 2024. NANPA lists 25 exchanges for its rate center across 2 area codes; 843 has the most (19, 76%). 843 is part of an overlay with 854, so a new local number in Mount Pleasant may carry any of those codes depending on which have numbers available. Mount Pleasant is in the Eastern time zone.

According to NANPA's dialing-plan data, local calls within 843 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.

Who holds Mount Pleasant phone exchanges

11 carriers hold the 25 exchanges assigned to Mount Pleasant's rate center. Bellsouth Telecomm INC d/b/a Southern Bell Tel & Tel has the most, with 7. 20 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. Holding a code means NANPA assigned that block of numbers to the carrier for this rate center; individual numbers may since have been ported elsewhere.

Local prefixes for Mount Pleasant

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Mount Pleasant's rate center (MTPLEASANT). The earliest assignment date recorded in the file for these codes is 2001. 5 of the 25 were assigned in 2020 or later.

When Mount Pleasant's exchanges were assigned

Assignment dates show when each block of Mount Pleasant numbers was added to the local supply.

Rate centers and local calling in Mount Pleasant

NANPA ties every exchange to a rate center. For Mount Pleasant that is MTPLEASANT, so a number from one of these exchanges reads as local to people in and around Mount Pleasant.

If your business already has a Mount Pleasant number, porting it to Callata is free and keeps it on your cards, listings and vehicles.

Who does business near Mount Pleasant

Mount Pleasant is part of the Charleston-North Charleston, SC metro area, home to 870,000 people in 2024. County Business Patterns counted 22,892 business establishments in the Charleston, SC metro area in 2023, employing 321,692 people. The largest sectors by establishment count are professional, scientific, and technical services (3,015), retail trade (2,964), and construction (2,367).

Setting up a Mount Pleasant business line

Callata is a business phone system priced at $99 a month with 5 users included, then $20 per additional user. Callata Office includes up to 3 local business numbers, unlimited inbound calling, 1,500 pooled outbound US and Canada minutes per user each month, a browser softphone that can also ring your cell, voicemail with transcription, call recording with AI summaries, business-hours routing and E911 on every number.

If you already have a number in Mount Pleasant, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.

Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.

Per-seat phone plans multiply by headcount. For the rounded average establishment size in the Charleston, SC metro area, 14 users on RingCentral RingEX Core come to $420.00 a month and on Ooma Office Pro $349.30, at month-to-month list prices checked September 28, 2026. On Callata the same 14 people cost $279.00 a month, less than either per-seat plan.