Get a local business phone number in Sandstone, MN
Sandstone's area code, prefixes and carriers from NANPA records, and how to put a Sandstone number in front of your customers.
- Area code
- 320
- Exchanges
- 6NANPA-assigned
- Carriers
- 5
- Population
- 2,466Census 2024 est.
Area codes in Sandstone
With 2,466 residents in the Census 2024 estimate, Sandstone sits in Pine County, Minnesota. All 6 exchanges NANPA lists for its rate center are in area code 320. Sandstone is in the Central time zone.
According to NANPA's dialing-plan data, local calls within 320 are dialed as seven digits and toll calls as 1 plus ten digits.
| Area code | Exchanges here | Share | In service since | Overlay with | Time zone |
|---|---|---|---|---|---|
| 320 | 6 | 100% | 1996 | none | Central |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Who holds Sandstone phone exchanges
5 carriers hold the 6 exchanges assigned to Sandstone's rate center. Cellco Partnership d/b/a Verizon Wireless - MN has the most, with 2. 6 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Sandstone can come from any of these blocks; once it is yours, porting lets it move between providers.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Cellco Partnership d/b/a Verizon Wireless - MN | 2 | 33% |
| Onvoy, LLC - MN | 1 | 17% |
| Qwest Corporation | 1 | 17% |
| Ton80 Communications, LLC | 1 | 17% |
| Terra Nova Telecom INC. | 1 | 17% |
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.
Local prefixes for Sandstone
These are the central office codes NANPA records for Sandstone. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2003. 1 of the 6 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 320 | 216, 245, 372, 375, 742, 999 |
Source: NANPA utilized central office code file.
When Sandstone's exchanges were assigned
Assignment dates show when each block of Sandstone numbers was added to the local supply.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 2 | 50% |
| 2010s | 1 | 25% |
| 2020s | 1 | 25% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
How local numbers work in Sandstone
Phone numbers are tied to a rate center, the local calling area used to decide whether a call is local or toll. Sandstone's numbers are rated to the SANDSTONE rate center in NANPA's records. A business number from one of the prefixes above shows up on customers' phones as a Sandstone number.
If your business already has a Sandstone number, porting it to Callata is free and keeps it on your cards, listings and vehicles.
The local business market
Sandstone is outside any Census metro or micropolitan area, so the figures below are statewide. County Business Patterns counted 154,455 business establishments in Minnesota in 2023, employing 2,803,410 people. The largest sectors by establishment count are health care and social assistance (19,985), retail trade (17,727), and construction (17,568).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Full-service restaurants | 3,879 | 87,230 | 22.5 |
| Limited-service restaurants | 3,848 | 75,564 | 19.6 |
| Offices of real estate agents and brokers | 3,247 | 6,341 | 2.0 |
| Insurance agencies and brokerages | 3,131 | 16,007 | 5.1 |
| Residential remodelers | 2,988 | 9,125 | 3.1 |
| Landscaping services | 2,397 | 13,696 | 5.7 |
| Law offices | 2,052 | 15,663 | 7.6 |
| Dental offices | 1,884 | 17,650 | 9.4 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Setting up a Sandstone business line
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 Sandstone, 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 Minnesota, 18 users on RingCentral RingEX Core come to $540.00 a month and on Ooma Office Pro $449.10, at month-to-month list prices checked September 28, 2026. 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 Sandstone, MN?
320. All exchanges NANPA lists for Sandstone are in 320.
How many phone companies have exchanges in Sandstone?
5, holding 6 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Sandstone 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 Sandstone?
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).