CallataGuidesGet a local business phone number in Chamberlain, SD
Chamberlain's area code, prefixes and carriers from NANPA records, and how to put a Chamberlain number in front of your customers.
- Area code
- 605
- Exchanges
- 5NANPA-assigned
- Carriers
- 5
- Population
- 2,453Census 2024 est.
What area code is Chamberlain, SD?
Chamberlain city is a Census place in Brule County, South Dakota, with an estimated 2,453 residents in 2024. All 5 exchanges NANPA lists for its rate center are in area code 605. Chamberlain is in the Central and Mountain time zone.
According to NANPA's dialing-plan data, local calls within 605 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 |
|---|---|---|---|---|---|
| 605 | 5 | 100% | 1947 | none | Central and Mountain |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Phone carriers in Chamberlain
5 carriers hold the 5 exchanges assigned to Chamberlain's rate center. Midstate Telecom, INC. - SD has the most, with 1. 4 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 |
|---|---|---|
| Midstate Telecom, INC. - SD | 1 | 20% |
| New Cingular Wireless PCS, LLC - Il | 1 | 20% |
| Qwest Corporation | 1 | 20% |
| Airus, INC. - SD | 1 | 20% |
| Onvoy, LLC - SD | 1 | 20% |
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 Chamberlain
A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Chamberlain. The earliest assignment date recorded in the file for these codes is 2001. None were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 605 | 234, 730, 734, 815, 888 |
Source: NANPA utilized central office code file.
When Chamberlain's exchanges were assigned
The table groups Chamberlain's exchanges by the decade NANPA recorded them as assigned.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 1 | 33% |
| 2010s | 2 | 67% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
Rate centers and local calling in Chamberlain
NANPA ties every exchange to a rate center. For Chamberlain that is CHAMBERLAN, so a number from one of these exchanges reads as local to people in and around Chamberlain.
New local numbers are drawn from carrier inventory, so the exact 605 numbers available change over time; porting an existing number is free.
Businesses around Chamberlain
Chamberlain is outside any Census metro or micropolitan area, so the figures below are statewide. County Business Patterns counted 29,106 business establishments in South Dakota in 2023, employing 383,805 people. The largest sectors by establishment count are retail trade (3,838), construction (3,802), and other services (except public administration) (2,986).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Insurance agencies and brokerages | 745 | 3,229 | 4.3 |
| Full-service restaurants | 675 | 12,327 | 18.3 |
| Limited-service restaurants | 623 | 12,769 | 20.5 |
| Residential remodelers | 495 | 1,275 | 2.6 |
| Offices of real estate agents and brokers | 456 | 800 | 1.8 |
| Hotels and motels | 441 | 6,710 | 15.2 |
| New single-family housing construction contractors | 426 | 1,390 | 3.3 |
| Plumbing, heating and air-conditioning contractors | 401 | 4,356 | 10.9 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Setting up a Chamberlain 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.
Porting a number you already use in Chamberlain 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 South Dakota, 13 users on RingCentral RingEX Core come to $390.00 a month and on Ooma Office Pro $324.35, at month-to-month list prices checked September 28, 2026. Callata comes to $259.00 a month for 13 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 | $259.00 | $3,108.00 |
| Quo (Starter) | $19.00 per user | $247.00 | $2,964.00 |
| Nextiva (Core) | $23.00 per user | $299.00 | $3,588.00 |
| Ooma (Office Pro) | $24.95 per user | $324.35 | $3,892.20 |
| Dialpad (Standard) | $27.00 per user | $351.00 | $4,212.00 |
| RingCentral (RingEX Core) | $30.00 per user | $390.00 | $4,680.00 |
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 Chamberlain, SD?
605. All exchanges NANPA lists for Chamberlain are in 605.
How many phone companies have exchanges in Chamberlain?
5, holding 5 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Chamberlain 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 Chamberlain?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 13 users come to $259.00 a month. For comparison, 13 users on RingCentral RingEX Core list at $390.00 a month (checked September 28, 2026).