Area code 821

Area code 821 at a glance

Area code 821 is a geographic area code in South Carolina, in service since August 19, 2024, according to the North American Numbering Plan Administrator (NANPA). It is an overlay: 821 and 864 cover the same territory, so neighbors on the same street can have different area codes. It is in the Eastern time zone. The places with the most assigned exchanges include Greenwood, Laurens, Greenville, Spartanburg, and Anderson. By population, its largest named places are Greenville, Spartanburg, Anderson, Simpsonville, and Greenwood.

Places served by 821

821 holds 1.5% of the 2,765 central office codes assigned in South Carolina, the 6th most of the state's 6 codes. 13 Census places could be matched to rate centers with 821 exchanges; the most populous are Greenville (74,371), Spartanburg (39,606), Anderson (30,937), and Simpsonville (28,078). Each place page lists the exact prefixes and carriers for that town.

How calls are dialed in 821

According to NANPA's dialing-plan data, local calls within 821 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits. Because local calls need the area code, business cards, signage and website copy should always show the full ten-digit number. NANPA's dialing-plan note for this code reads: "1+10 digit permissible at service provider discretion."

Carriers with 821 numbers

10 carriers hold the 42 central office codes assigned in 821. New Cingular Wireless PCS, LLC - Ga has the most, with 24 (57%). 42 of the codes (100%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. The code holder is not necessarily the carrier serving a given number today, since numbers can be ported between providers.

Rate centers and towns in 821

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 821 has codes in 16 rate centers. Rate center names in the file are abbreviations; where one matches a Census place, the table links to that city's local-number page.

821 code assignments over time

An area code has 800 possible central office codes that start with 2 through 9, a few of which are reserved (such as N11 service codes and 555). 42 are assigned in 821, 5.3% of 800. 42 were assigned in 2020 or later.

Using area code 821 for business calls

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.

Porting a number you already use in area code 821 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.