CallataGuidesGet a local business phone number in Alton, IL
Alton's area codes, prefixes and carriers from NANPA records, and how to put a Alton number in front of your customers.
- Area code
- 618 / 730
- Exchanges
- 17NANPA-assigned
- Carriers
- 5
- Population
- 24,967Census 2024 est.
Area codes in Alton
Alton, in Madison County, Illinois, had a Census-estimated population of 24,967 in July 2024. NANPA lists 17 exchanges for its rate center across 2 area codes; 618 has the most (15, 88%). 618 is part of an overlay with 730, so a new local number in Alton may carry any of those codes depending on which have numbers available. Alton is in the Central time zone.
According to NANPA's dialing-plan data, local calls within 618 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.
Phone carriers in Alton
5 carriers hold the 17 exchanges assigned to Alton's rate center. Illinois Bell Tel CO has the most, with 9. 13 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 |
|---|---|---|
| Illinois Bell Tel CO | 9 | 53% |
| New Cingular Wireless PCS, LLC - Il | 4 | 24% |
| Paetec Itel, LLC | 2 | 12% |
| Nuso, LLC | 1 | 5.9% |
| T-mobile USA, INC. | 1 | 5.9% |
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 Alton
Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Alton's rate center (ALTON). The earliest assignment date recorded in the file for these codes is 2014. 6 of the 17 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 618 | 208, 374, 433, 462, 463, 465, 466, 467, 468, 474, 619, 636, 796, 818, 908 |
| 730 | 230, 265 |
Source: NANPA utilized central office code file.
When Alton's exchanges were assigned
Assignment dates show when each block of Alton numbers was added to the local supply.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2010s | 1 | 14% |
| 2020s | 6 | 86% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
How local numbers work in Alton
Phone numbers are tied to a rate center, the local calling area used to decide whether a call is local or toll. Alton's numbers are rated to the ALTON rate center in NANPA's records. A business number from one of the prefixes above shows up on customers' phones as a Alton number.
New local numbers are drawn from carrier inventory, so the exact 618 numbers available change over time; porting an existing number is free.
The local business market
Alton is part of the St. Louis, MO-IL metro area, home to 2.8 million people in 2024. County Business Patterns counted 69,470 business establishments in the St. Louis, MO-IL metro area in 2023, employing 1,263,674 people. The largest sectors by establishment count are health care and social assistance (10,427), retail trade (8,095), and professional, scientific, and technical services (7,057).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Limited-service restaurants | 2,334 | 45,289 | 19.4 |
| Full-service restaurants | 2,019 | 49,930 | 24.7 |
| Agencies providing services for the elderly and persons with disabilities | 1,898 | 16,546 | 8.7 |
| Physician practices | 1,785 | 22,126 | 12.4 |
| Insurance agencies and brokerages | 1,509 | 7,839 | 5.2 |
| Law offices | 1,393 | 10,509 | 7.5 |
| Offices of real estate agents and brokers | 1,099 | 2,523 | 2.3 |
| Landscaping services | 1,092 | 7,504 | 6.9 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Business phone service in Alton
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 Alton, 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 the St. Louis, MO-IL metro area. 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 Alton, IL?
Alton has exchanges in 618 and 730; 618 has the most.
How many phone companies have exchanges in Alton?
5, holding 17 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Alton 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 Alton?
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).