CallataGuidesGet a local business phone number in St. Louis, MO
St. Louis's area codes, prefixes and carriers from NANPA records, and how to put a St. Louis number in front of your customers.
- Area code
- 314 / 557
- Exchanges
- 332NANPA-assigned
- Carriers
- 40
- Population
- 279,695Census 2024 est.
What area code is St. Louis, MO?
With 279,695 residents in the Census 2024 estimate, St. Louis sits in St. Louis city, Missouri. NANPA lists 332 exchanges for its rate center across 2 area codes; 314 has the most (296, 89%). 314 is part of an overlay with 557, so a new local number in St. Louis may carry any of those codes depending on which have numbers available. St. Louis is in the Central time zone.
According to NANPA's dialing-plan data, local calls within 314 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.
St. Louis exchanges by carrier
40 carriers hold the 332 exchanges assigned to St. Louis's rate center. Southwestern Bell has the most, with 126. 226 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.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Southwestern Bell | 126 | 38% |
| T-mobile USA, INC. | 32 | 9.6% |
| New Cingular Wireless PCS, LLC - Il | 24 | 7.2% |
| Onvoy, LLC - Mo | 20 | 6.0% |
| Teleport Communications America, LLC - Mo | 17 | 5.1% |
| Spok, INC. | 14 | 4.2% |
| Mcimetro Access Transmission Services LLC - Mo | 14 | 4.2% |
| American Messaging Services, LLC | 11 | 3.3% |
| Bandwidth.com CLEC, LLC - Mo | 10 | 3.0% |
| Cellco Partnership d/b/a Verizon Wireless - Mo | 9 | 2.7% |
| Paetec Itel, LLC | 8 | 2.4% |
| Level 3 Communications, LLC - Mo | 6 | 1.8% |
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.
St. Louis phone prefixes
These are the central office codes NANPA records for St. Louis. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2001. 56 of the 332 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 314 | 202, 203, 204, 206, 207, 224, 226, 229, 230, 231, 235, 236, 240, 241, 242, 243, 244, 245, 247, 250, 255, 256, 257, 259, 260, 261, 263, 267, 268, 269, 273, 280, 282, 284, 285, 286, 289, 290, 295, 296, 297, 300, 305, 309, 312, 314, 318, 319, 320, 326, 327, 328, 331, 332, 333, 335, 337, 338, 339, 340, 342, 345, 349, 351, 352, 353, 354, 356, 361, 362, 366, 367, 371, 376, 379, 381, 382, 383, 385, 389, 390, 391, 393, 396, 398, 399, 405, 410, 418, 421, 425, 435, 436, 437, 444, 445, 446, 448, 449, 450, 454, 457, 460, 465, 466, 474, 476, 480, 481, 483, 489, 492, 499, 500, 502, 505, 508, 509, 510, 512, 516, 519, 530, 531, 532, 533, 534, 535, 536, 537, 539, 544, 546, 552, 553, 554, 556, 558, 559, 561, 565, 571, 573, 574, 577, 582, 583, 584, 588, 589, 597, 599, 600, 601, 612, 613, 615, 617, 621, 622, 627, 629, 631, 632, 633, 638, 641, 644, 645, 646, 647, 652, 655, 657, 658, 659, 663, 664, 665, 667, 668, 669, 670, 672, 676, 678, 679, 680, 685, 688, 696, 710, 719, 721, 723, 725, 726, 727, 728, 732, 735, 745, 746, 747, 751, 752, 754, 758, 760, 762, 763, 765, 766, 767, 768, 769, 771, 772, 773, 776, 781, 783, 788, 797, 798, 802, 806, 814, 818, 823, 826, 827, 828, 829, 832, 833, 836, 840, 841, 848 |
First 240 of 332 prefixes. Source: NANPA.
When St. Louis's exchanges were assigned
Assignment dates show when each block of St. Louis numbers was added to the local supply.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 29 | 21% |
| 2010s | 53 | 38% |
| 2020s | 56 | 41% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
Rate centers and local calling in St. Louis
What a caller sees as "local" is the area code plus prefix. In St. Louis, those come from the ST LOUIS rate center, as recorded by NANPA.
New local numbers are drawn from carrier inventory, so the exact 314 numbers available change over time; porting an existing number is free.
Who does business near St. Louis
St. Louis is part of the St. Louis, MO-IL metro area, home to 2.8 million people in 2024. County Business Patterns counted 69,470 business establishments in the St. Louis, MO-IL metro area in 2023, employing 1,263,674 people. The largest sectors by establishment count are health care and social assistance (10,427), retail trade (8,095), and professional, scientific, and technical services (7,057).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Limited-service restaurants | 2,334 | 45,289 | 19.4 |
| Full-service restaurants | 2,019 | 49,930 | 24.7 |
| Agencies providing services for the elderly and persons with disabilities | 1,898 | 16,546 | 8.7 |
| Physician practices | 1,785 | 22,126 | 12.4 |
| Insurance agencies and brokerages | 1,509 | 7,839 | 5.2 |
| Law offices | 1,393 | 10,509 | 7.5 |
| Offices of real estate agents and brokers | 1,099 | 2,523 | 2.3 |
| Landscaping services | 1,092 | 7,504 | 6.9 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
A St. Louis 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.
If you already have a number in St. Louis, 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.
The comparison below uses 18 users, the rounded average establishment size in the St. Louis, MO-IL metro area. At list prices checked September 28, 2026, that is $449.10 a month on Ooma Office Pro and $540.00 on RingCentral RingEX Core. On Callata the same 18 people cost $359.00 a month, less than either per-seat plan.
| Provider (plan) | Pricing basis | Per month | Per year |
|---|---|---|---|
| Callata (Callata Office) | $99 incl. 5 users, $20 per extra user | $359.00 | $4,308.00 |
| Quo (Starter) | $19.00 per user | $342.00 | $4,104.00 |
| Nextiva (Core) | $23.00 per user | $414.00 | $4,968.00 |
| Ooma (Office Pro) | $24.95 per user | $449.10 | $5,389.20 |
| Dialpad (Standard) | $27.00 per user | $486.00 | $5,832.00 |
| RingCentral (RingEX Core) | $30.00 per user | $540.00 | $6,480.00 |
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 St. Louis, MO?
St. Louis has exchanges in 314 and 557; 314 has the most.
How many phone companies have exchanges in St. Louis?
40, holding 332 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing St. Louis 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 St. Louis?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 18 users come to $359.00 a month. For comparison, 18 users on RingCentral RingEX Core list at $540.00 a month (checked September 28, 2026).