Get a local business phone number in Sullivan's Island, SC

Area codes in Sullivan's Island

Sullivan's Island, in Charleston County, South Carolina, had a Census-estimated population of 1,948 in July 2024. NANPA lists 5 exchanges for its rate center across 2 area codes; 843 has the most (4, 80%). 843 is part of an overlay with 854, so a new local number in Sullivan's Island may carry any of those codes depending on which have numbers available. Sullivan's Island 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.

Phone carriers in Sullivan's Island

4 carriers hold the 5 exchanges assigned to Sullivan's Island's rate center. Bellsouth Telecomm INC d/b/a Southern Bell Tel & Tel has the most, with 2. 5 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. The table counts codes by the operating company NANPA assigned them to, not by who serves each number today.

Local prefixes for Sullivan's Island

A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Sullivan's Island. The earliest assignment date recorded in the file for these codes is 2010. 1 of the 5 were assigned in 2020 or later.

When Sullivan's Island's exchanges were assigned

The table groups Sullivan's Island's exchanges by the decade NANPA recorded them as assigned.

How local numbers work in Sullivan's Island

NANPA ties every exchange to a rate center. For Sullivan's Island that is SULLIVNSIS, so a number from one of these exchanges reads as local to people in and around Sullivan's Island.

Keeping an existing Sullivan's Island number costs nothing on Callata, because porting is free; a new number depends on what carriers have open in 843 when you pick it.

Who does business near Sullivan's Island

Sullivan's Island 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 Sullivan's Island business line

Callata Office costs $99 per month for up to 5 people, and each additional user is $20 a month. That covers up to 3 local numbers, calling from a browser or your cell, transcribed voicemail, recorded calls with AI summaries, after-hours routing and E911 on each number.

Porting a number you already use in Sullivan's Island is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.

AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.

The comparison below uses 14 users, the rounded average establishment size in the Charleston, SC metro area. At list prices checked September 28, 2026, that is $349.30 a month on Ooma Office Pro and $420.00 on RingCentral RingEX Core. Callata comes to $279.00 a month for 14 users ($99 a month with 5 users included, then $20 per additional user), below both.