CallataGuidesGet a local business phone number in Gregory, SD
Gregory's area code, prefixes and carriers from NANPA records, and how to put a Gregory number in front of your customers.
- Area code
- 605
- Exchanges
- 3NANPA-assigned
- Carriers
- 2
- Population
- 1,270Census 2024 est.
Gregory area codes
Gregory city is a Census place in Gregory County, South Dakota, with an estimated 1,270 residents in 2024. All 3 exchanges NANPA lists for its rate center are in area code 605. Gregory 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 | 3 | 100% | 1947 | none | Central and Mountain |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Phone carriers in Gregory
2 carriers hold the 3 exchanges assigned to Gregory's rate center. Cellco Partnership d/b/a Verizon Wireless - SD has the most, with 2. 2 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 |
|---|---|---|
| Cellco Partnership d/b/a Verizon Wireless - SD | 2 | 67% |
| Vivian Tel CO d/b/a Golden West Telecommunications | 1 | 33% |
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 Gregory
A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Gregory. None were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 605 | 830, 831, 835 |
Source: NANPA utilized central office code file.
What makes a number local to Gregory
What a caller sees as "local" is the area code plus prefix. In Gregory, those come from the GREGORY rate center, as recorded by NANPA.
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 Gregory
Gregory 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.
Business phone service in Gregory
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.
If you already have a number in Gregory, 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 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. On Callata the same 13 people cost $259.00 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 | $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 Gregory, SD?
605. All exchanges NANPA lists for Gregory are in 605.
How many phone companies have exchanges in Gregory?
2, holding 3 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Gregory 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 Gregory?
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).