CallataGuides

Get a local business phone number in Clemson, SC

Clemson's area codes, prefixes and carriers from NANPA records, and how to put a Clemson number in front of your customers.

Area code
864 / 821
Exchanges
17NANPA-assigned
Carriers
7
Population
18,610Census 2024 est.

What area code is Clemson, SC?

Clemson city is a Census place in Pickens County, South Carolina, with an estimated 18,610 residents in 2024. NANPA lists 17 exchanges for its rate center across 2 area codes; 864 has the most (16, 94%). 864 is part of an overlay with 821, so a new local number in Clemson may carry any of those codes depending on which have numbers available. Clemson is in the Eastern time zone.

According to NANPA's dialing-plan data, local calls within 864 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.

Area codes with exchanges in Clemson, SC
Area codeExchanges hereShareIn service sinceOverlay withTime zone
8641694%1995821Eastern
82115.9%2024864Eastern

Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.

Who holds Clemson phone exchanges

7 carriers hold the 17 exchanges assigned to Clemson's rate center. Bellsouth Telecomm INC d/b/a Southern Bell Tel & Tel has the most, with 5. 16 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Clemson can come from any of these blocks; once it is yours, porting lets it move between providers.

Carriers holding exchanges in Clemson, SC
Carrier (NANPA operating company)ExchangesShare
Bellsouth Telecomm INC d/b/a Southern Bell Tel & Tel529%
Onvoy, LLC - SC318%
Paetec Itel, LLC318%
Cellco Partnership d/b/a Verizon Wireless - SC212%
New Cingular Wireless PCS, LLC - Ga212%
Level 3 Communications, LLC - SC15.9%
Metropcs, INC.15.9%

Carrier names are the operating company (OCN) names on NANPA's utilized central office code file dated 10/01/2026. A carrier holding a code may port numbers to other carriers.

Clemson phone prefixes

These are the central office codes NANPA records for Clemson. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2001. 4 of the 17 were assigned in 2020 or later.

Prefixes assigned in Clemson, SC
Area codePrefixes (NXX)
821888
864533, 623, 624, 633, 635, 643, 650, 653, 654, 656, 722, 780, 795, 858, 925, 986

Source: NANPA utilized central office code file.

When Clemson's exchanges were assigned

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

Clemson, SC: exchanges by decade assigned
Decade assignedExchangesShare
2000s333%
2010s222%
2020s444%

Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.

Rate centers and local calling in Clemson

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

Keeping an existing Clemson number costs nothing on Callata, because porting is free; a new number depends on what carriers have open in 864 when you pick it.

Businesses around Clemson

Clemson is part of the Greenville-Anderson-Greer, SC metro area, home to 997,000 people in 2024. County Business Patterns counted 22,892 business establishments in the Greenville, SC metro area in 2023, employing 383,864 people. The largest sectors by establishment count are retail trade (3,176), professional, scientific, and technical services (2,657), and other services (except public administration) (2,411).

Selected industries in the Greenville, SC metro area, 2023
IndustryEstablishmentsEmployeesEmployees per establishment
Limited-service restaurants83616,66119.9
Full-service restaurants81616,83820.6
Offices of real estate agents and brokers6011,0201.7
Law offices4392,7286.2
Insurance agencies and brokerages4171,8894.5
Physician practices3595,21614.5
Dental offices3533,2929.3
Landscaping services3362,0546.1

Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.

A Clemson number on Callata

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 Clemson 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 17 users, the rounded average establishment size in the Greenville, SC metro area. At list prices checked September 28, 2026, that is $424.15 a month on Ooma Office Pro and $510.00 on RingCentral RingEX Core. Callata comes to $339.00 a month for 17 users ($99 a month with 5 users included, then $20 per additional user), below both.

Monthly list price for a 17-person team
Provider (plan)Pricing basisPer monthPer year
Callata (Callata Office)$99 incl. 5 users, $20 per extra user$339.00$4,068.00
Quo (Starter)$19.00 per user$323.00$3,876.00
Nextiva (Core)$23.00 per user$391.00$4,692.00
Ooma (Office Pro)$24.95 per user$424.15$5,089.80
Dialpad (Standard)$27.00 per user$459.00$5,508.00
RingCentral (RingEX Core)$30.00 per user$510.00$6,120.00

Competitor prices are each vendor's published month-to-month list price per user for its lowest plan that includes business calling and texting, checked September 28, 2026: Quo Starter $19, Nextiva Core $23, Ooma Office Pro $24.95 (Essentials excludes texting; one-time $29.95 activation not included), Dialpad Standard $27, RingCentral RingEX Core $30 ($20 billed annually). Prices exclude taxes and fees and may change; annual contracts lower some competitors' prices.

Frequently asked questions

What area code is Clemson, SC?

Clemson has exchanges in 864 and 821; 864 has the most.

How many phone companies have exchanges in Clemson?

7, holding 17 exchanges between them, according to NANPA's 10/01/2026 file.

Can I keep my existing Clemson business number?

Yes. Porting an existing number to Callata is free. Texting from it starts after carrier registration (10DLC), a one-time $49 fee.

How much is a business phone line in Clemson?

Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 17 users come to $339.00 a month. For comparison, 17 users on RingCentral RingEX Core list at $510.00 a month (checked September 28, 2026).