CallataGuidesGet a local business phone number in Karnes City, TX
Karnes City's area code, prefixes and carriers from NANPA records, and how to put a Karnes City number in front of your customers.
- Area code
- 830
- Exchanges
- 4NANPA-assigned
- Carriers
- 3
- Population
- 3,620Census 2024 est.
What area code is Karnes City, TX?
Karnes City city is a Census place in Karnes County, Texas, with an estimated 3,620 residents in 2024. All 4 exchanges NANPA lists for its rate center are in area code 830. Karnes City is in the Central time zone.
According to NANPA's dialing-plan data, local calls within 830 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 |
|---|---|---|---|---|---|
| 830 | 4 | 100% | 1997 | none | Central |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Who holds Karnes City phone exchanges
3 carriers hold the 4 exchanges assigned to Karnes City's rate center. Southwestern Bell has the most, with 2. 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 |
|---|---|---|
| Southwestern Bell | 2 | 50% |
| Onvoy Spectrum, LLC | 1 | 25% |
| New Cingular Wireless PCS, LLC - Il | 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.
Local prefixes for Karnes City
These are the central office codes NANPA records for Karnes City. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2021. 1 of the 4 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 830 | 254, 508, 623, 780 |
Source: NANPA utilized central office code file.
What makes a number local to Karnes City
What a caller sees as "local" is the area code plus prefix. In Karnes City, those come from the KARNESCITY rate center, as recorded by NANPA.
Keeping an existing Karnes City number costs nothing on Callata, because porting is free; a new number depends on what carriers have open in 830 when you pick it.
Businesses around Karnes City
Karnes City is outside any Census metro or micropolitan area, so the figures below are statewide. County Business Patterns counted 670,878 business establishments in Texas in 2023, employing 12,012,629 people. The largest sectors by establishment count are retail trade (84,369), professional, scientific, and technical services (83,842), and health care and social assistance (80,576).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Limited-service restaurants | 24,360 | 545,407 | 22.4 |
| Physician practices | 21,500 | 217,413 | 10.1 |
| Full-service restaurants | 20,819 | 493,197 | 23.7 |
| Law offices | 13,833 | 87,363 | 6.3 |
| Insurance agencies and brokerages | 12,210 | 78,885 | 6.5 |
| Dental offices | 11,902 | 86,333 | 7.3 |
| Offices of real estate agents and brokers | 11,405 | 33,989 | 3.0 |
| Management consulting firms | 9,705 | 80,499 | 8.3 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
A Karnes City 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.
If you already have a number in Karnes City, 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.
An 18-person team is the benchmark here, the rounded average establishment size in Texas. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $540.00 a month and Ooma Office Pro $449.10. 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 Karnes City, TX?
830. All exchanges NANPA lists for Karnes City are in 830.
How many phone companies have exchanges in Karnes City?
3, holding 4 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Karnes City 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 Karnes City?
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).