CallataGuidesGet a local business phone number in St. Charles, MN
St. Charles's area code, prefixes and carriers from NANPA records, and how to put a St. Charles number in front of your customers.
- Area code
- 507
- Exchanges
- 4NANPA-assigned
- Carriers
- 4
- Population
- 4,057Census 2024 est.
Area codes in St. Charles
St. Charles, in Winona County, Minnesota, had a Census-estimated population of 4,057 in July 2024. All 4 exchanges NANPA lists for its rate center are in area code 507. 507 is part of an overlay with 924, so a new local number in St. Charles may carry any of those codes depending on which have numbers available. St. Charles is in the Central time zone.
According to NANPA's dialing-plan data, local calls within 507 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.
| Area code | Exchanges here | Share | In service since | Overlay with | Time zone |
|---|---|---|---|---|---|
| 507 | 4 | 100% | 1954 | 924 | Central |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
St. Charles exchanges by carrier
4 carriers hold the 4 exchanges assigned to St. Charles's rate center. Onvoy, LLC - MN has the most, with 1. 4 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.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Onvoy, LLC - MN | 1 | 25% |
| Fractel, LLC | 1 | 25% |
| Bandwidth.com CLEC, LLC - MN | 1 | 25% |
| Qwest Corporation | 1 | 25% |
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.
Exchanges (NPA-NXX) assigned in St. Charles
Each prefix below is a block of up to 10,000 numbers that NANPA assigned to St. Charles's rate center (ST CHARLES). The earliest assignment date recorded in the file for these codes is 2006. 1 of the 4 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 507 | 505, 844, 881, 932 |
Source: NANPA utilized central office code file.
When St. Charles's exchanges were assigned
The table groups St. Charles's exchanges by the decade NANPA recorded them as assigned.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 1 | 50% |
| 2020s | 1 | 50% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
What makes a number local to St. Charles
What a caller sees as "local" is the area code plus prefix. In St. Charles, those come from the ST CHARLES rate center, as recorded by NANPA.
If your business already has a St. Charles number, porting it to Callata is free and keeps it on your cards, listings and vehicles.
The local business market
St. Charles is part of the Winona, MN micropolitan area, home to 49,973 people in 2024. County Business Patterns counted 1,145 business establishments in the Winona, MN micropolitan area in 2023, employing 23,937 people. The largest sectors by establishment count are retail trade (146), health care and social assistance (132), and accommodation and food services (132).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Full-service restaurants | 37 | 491 | 13.3 |
| Limited-service restaurants | 33 | 711 | 21.5 |
| Drinking places | 27 | 311 | 11.5 |
| Insurance agencies and brokerages | 21 | — | — |
| Electrical contractors | 21 | 115 | 5.5 |
| Plumbing, heating and air-conditioning contractors | 17 | 239 | 14.1 |
| Dental offices | 15 | 137 | 9.1 |
| General automotive repair shops | 15 | 67 | 4.5 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
A St. Charles number on Callata
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 St. Charles 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.
Per-seat phone plans multiply by headcount. For the rounded average establishment size in the Winona, MN micropolitan area, 21 users on RingCentral RingEX Core come to $630.00 a month and on Ooma Office Pro $523.95, at month-to-month list prices checked September 28, 2026. Callata comes to $419.00 a month for 21 users ($99 a month with 5 users included, then $20 per additional user), below both.
| Provider (plan) | Pricing basis | Per month | Per year |
|---|---|---|---|
| Callata (Callata Office) | $99 incl. 5 users, $20 per extra user | $419.00 | $5,028.00 |
| Quo (Starter) | $19.00 per user | $399.00 | $4,788.00 |
| Nextiva (Core) | $23.00 per user | $483.00 | $5,796.00 |
| Ooma (Office Pro) | $24.95 per user | $523.95 | $6,287.40 |
| Dialpad (Standard) | $27.00 per user | $567.00 | $6,804.00 |
| RingCentral (RingEX Core) | $30.00 per user | $630.00 | $7,560.00 |
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. Charles, MN?
507. All exchanges NANPA lists for St. Charles are in 507.
How many phone companies have exchanges in St. Charles?
4, holding 4 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing St. Charles 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. Charles?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 21 users come to $419.00 a month. For comparison, 21 users on RingCentral RingEX Core list at $630.00 a month (checked September 28, 2026).