Get a local business phone number in Jefferson City, TN

What area code is Jefferson City, TN?

Jefferson City city is a Census place in Jefferson County, Tennessee, with an estimated 9,013 residents in 2024. All 6 exchanges NANPA lists for its rate center are in area code 865. Jefferson City is in the Eastern time zone.

According to NANPA's dialing-plan data, local calls within 865 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.

Who holds Jefferson City phone exchanges

5 carriers hold the 6 exchanges assigned to Jefferson City's rate center. Bellsouth Telecomm INC d/b/a South Central Bell 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. 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.

Jefferson City phone prefixes

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Jefferson City's rate center (JEFFERSNCY). The earliest assignment date recorded in the file for these codes is 2009. 1 of the 6 were assigned in 2020 or later.

When Jefferson City's exchanges were assigned

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

Rate centers and local calling in Jefferson City

Phone numbers are tied to a rate center, the local calling area used to decide whether a call is local or toll. Jefferson City's numbers are rated to the JEFFERSNCY rate center in NANPA's records. A business number from one of the prefixes above shows up on customers' phones as a Jefferson City number.

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

Businesses around Jefferson City

Jefferson City is part of the Morristown, TN metro area, home to 127,000 people in 2024. County Business Patterns counted 2,110 business establishments in the Morristown, TN metro area in 2023, employing 42,010 people. The largest sectors by establishment count are retail trade (390), health care and social assistance (263), and other services (except public administration) (261).

A Jefferson City number on Callata

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 Jefferson City 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 20 users, the rounded average establishment size in the Morristown, TN metro area. At list prices checked September 28, 2026, that is $499.00 a month on Ooma Office Pro and $600.00 on RingCentral RingEX Core. Callata comes to $399.00 a month for 20 users ($99 a month with 5 users included, then $20 per additional user), below both.