Get a local business phone number in Morristown, TN

What area code is Morristown, TN?

With 32,994 residents in the Census 2024 estimate, Morristown sits in Hamblen County, Tennessee. All 28 exchanges NANPA lists for its rate center are in area code 423. 423 is part of an overlay with 729, so a new local number in Morristown may carry any of those codes depending on which have numbers available. Morristown is in the Eastern and Central time zone.

According to NANPA's dialing-plan data, local calls within 423 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.

Phone carriers in Morristown

10 carriers hold the 28 exchanges assigned to Morristown's rate center. Bellsouth Telecomm INC d/b/a South Central Bell Tel has the most, with 8. 21 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Morristown can come from any of these blocks; once it is yours, porting lets it move between providers.

Local prefixes for Morristown

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Morristown's rate center (MORRISTOWN). The earliest assignment date recorded in the file for these codes is 2001. 2 of the 28 were assigned in 2020 or later.

When Morristown's exchanges were assigned

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

Rate centers and local calling in Morristown

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

New local numbers are drawn from carrier inventory, so the exact 423 numbers available change over time; porting an existing number is free.

Businesses around Morristown

Morristown 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).

Setting up a Morristown 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.

Porting a number you already use in Morristown 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.