Missouri business phone guide

Businesses in Missouri

Missouri had 6.2 million residents in the Census Bureau's July 2024 estimate, up 1.5% from April 2020. The U.S. population grew 2.6% over the same period. County Business Patterns counted 151,475 business establishments in the state in 2023 with 2,631,543 mid-March employees and $160.7 billion in annual payroll. The average establishment has 17.4 employees. 53.1% of establishments with employees had fewer than five people. The three largest sectors by establishments are health care and social assistance (20,637), retail trade (19,971), and other services (except public administration) (15,950).

Missouri compared with the U.S.

Missouri has 24.3 business establishments per 1,000 residents, in line with the U.S. figure of 24.6. Establishments average 17.4 employees against 16.7 nationally, and payroll per employee is $61,049 (10.7% below the U.S. $68,342). 53.1% of establishments with employees have fewer than five people (U.S.: 55.5%), while 5.6% have 50 or more. Because a handful of large employers lift the average, the share of very small establishments says more about who buys a small-business phone system.

Area codes in Missouri

NANPA lists 9 geographic area codes in service in Missouri, with 4,168 central office codes assigned across 721 rate centers and held by 113 carriers. 573 has the most assigned codes (786). 6 of them are part of overlays. The newest in service is 235, since March 24, 2024.

Small-business industries in Missouri

Among the 141 phone-heavy small-business industries these guides cover, the largest in Missouri by establishment count are limited-service restaurants (4,814), full-service restaurants (4,522), and agencies providing services for the elderly and persons with disabilities (3,454). Follow an industry for its metro-level counts and what a phone system costs a typical team.

Metro and micropolitan areas

26 Census metro or micropolitan areas include part of Missouri. The largest is St. Louis, MO-IL with 2.8 million residents.

Choosing an area code in Missouri

8 of Missouri's 9 area codes require ten-digit dialing for local calls; in the others NANPA still lists seven-digit local dialing. In overlays (235/573, 816/975, and 314/557), the codes share one territory, so a new number may come from any code in the overlay. The city pages show which codes dominate each place, which is the best guide to the number your customers will recognize.

Largest Missouri cities for local numbers

228 Missouri cities and towns have their own local-number page. The most populous are Kansas City (816/975), St. Louis (314/557), Springfield (417), and Columbia (235/573).

What phone service costs a Missouri business

A 17-person team is the benchmark here, the rounded average establishment size in Missouri. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $510.00 a month and Ooma Office Pro $424.15. Callata comes to $339.00 a month for 17 users ($99 a month with 5 users included, then $20 per additional user), below both.

Callata in Missouri

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.

Porting a number you already use in Missouri 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.