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Get a local business phone number in Dexter, MO

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

Area code
573
Exchanges
8NANPA-assigned
Carriers
6
Population
7,890Census 2024 est.

Dexter area codes

With 7,890 residents in the Census 2024 estimate, Dexter sits in Stoddard County, Missouri. All 8 exchanges NANPA lists for its rate center are in area code 573. 573 is part of an overlay with 235, so a new local number in Dexter may carry any of those codes depending on which have numbers available. Dexter is in the Central time zone.

According to NANPA's dialing-plan data, local calls within 573 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.

Area codes with exchanges in Dexter, MO
Area codeExchanges hereShareIn service sinceOverlay withTime zone
5738100%1996235Central

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

Dexter exchanges by carrier

6 carriers hold the 8 exchanges assigned to Dexter's rate center. New Cingular Wireless PCS, LLC - Il has the most, with 2. 6 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.

Carriers holding exchanges in Dexter, MO
Carrier (NANPA operating company)ExchangesShare
New Cingular Wireless PCS, LLC - Il225%
Southwestern Bell225%
Level 3 Communications, LLC - Mo113%
Cellco Partnership d/b/a Verizon Wireless - Mo113%
Teleport Communications America, LLC - Mo113%
T-mobile USA, INC.113%

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.

Dexter phone prefixes

These are the central office codes NANPA records for Dexter. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2007. 1 of the 8 were assigned in 2020 or later.

Prefixes assigned in Dexter, MO
Area codePrefixes (NXX)
573414, 421, 614, 624, 625, 820, 891, 935

Source: NANPA utilized central office code file.

When Dexter's exchanges were assigned

Assignment dates show when each block of Dexter numbers was added to the local supply.

Dexter, MO: exchanges by decade assigned
Decade assignedExchangesShare
2000s267%
2020s133%

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

What makes a number local to Dexter

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

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

Businesses around Dexter

Dexter is outside any Census metro or micropolitan area, so the figures below are statewide. County Business Patterns counted 151,475 business establishments in Missouri in 2023, employing 2,631,543 people. The largest sectors by establishment count are health care and social assistance (20,637), retail trade (19,971), and other services (except public administration) (15,950).

Selected industries in Missouri, 2023
IndustryEstablishmentsEmployeesEmployees per establishment
Limited-service restaurants4,81498,62420.5
Full-service restaurants4,522101,10422.4
Agencies providing services for the elderly and persons with disabilities3,45429,3608.5
Insurance agencies and brokerages3,33019,0595.7
Physician practices3,04240,93913.5
Law offices2,75918,4796.7
Offices of real estate agents and brokers2,5506,5312.6
Landscaping services2,19913,2016.0

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

A Dexter number on Callata

For $99 a month, Callata puts a team of up to 5 on one plan ($20 for each person after that): up to 3 local numbers, unlimited inbound calls, a pooled allowance of 1,500 outbound US and Canada minutes per user, browser and cell calling, voicemail transcription with urgency triage, recorded calls with AI summaries and business-hours routing, with E911 on every number.

If you already have a number in Dexter, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.

Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.

Per-seat phone plans multiply by headcount. For the rounded average establishment size in Missouri, 17 users on RingCentral RingEX Core come to $510.00 a month and on Ooma Office Pro $424.15, at month-to-month list prices checked September 28, 2026. On Callata the same 17 people cost $339.00 a month, less than either per-seat plan.

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 Dexter, MO?

573. All exchanges NANPA lists for Dexter are in 573.

How many phone companies have exchanges in Dexter?

6, holding 8 exchanges between them, according to NANPA's 10/01/2026 file.

Can I keep my existing Dexter 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 Dexter?

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).