CallataGuidesGet a local business phone number in Tremont, IL
Tremont's area code, prefixes and carriers from NANPA records, and how to put a Tremont number in front of your customers.
- Area code
- 309
- Exchanges
- 3NANPA-assigned
- Carriers
- 2
- Population
- 2,641Census 2024 est.
Tremont area codes
Tremont township is a Census town in Tazewell County, Illinois, with an estimated 2,641 residents in 2024. All 3 exchanges NANPA lists for its rate center are in area code 309. 309 is part of an overlay with 861, so a new local number in Tremont may carry any of those codes depending on which have numbers available. Tremont is in the Central time zone.
According to NANPA's dialing-plan data, local calls within 309 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 |
|---|---|---|---|---|---|
| 309 | 3 | 100% | 1957 | 861 | Central |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Tremont exchanges by carrier
2 carriers hold the 3 exchanges assigned to Tremont's rate center. Onvoy, LLC has the most, with 2. 3 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Tremont can come from any of these blocks; once it is yours, porting lets it move between providers.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Onvoy, LLC | 2 | 67% |
| Frontier North, INC. - Il | 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 Tremont
These are the central office codes NANPA records for Tremont. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2002. 1 of the 3 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 309 | 915, 925, 929 |
Source: NANPA utilized central office code file.
When Tremont's exchanges were assigned
The table groups Tremont's exchanges by the decade NANPA recorded them as assigned.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 1 | 50% |
| 2020s | 1 | 50% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
What makes a number local to Tremont
What a caller sees as "local" is the area code plus prefix. In Tremont, those come from the TREMONT rate center, as recorded by NANPA.
New local numbers are drawn from carrier inventory, so the exact 309 numbers available change over time; porting an existing number is free.
The local business market
Tremont is part of the Peoria, IL metro area, home to 365,000 people in 2024. County Business Patterns counted 8,084 business establishments in the Peoria, IL metro area in 2023, employing 159,361 people. The largest sectors by establishment count are retail trade (1,143), other services (except public administration) (964), and health care and social assistance (906).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Limited-service restaurants | 272 | 5,307 | 19.5 |
| Full-service restaurants | 264 | 4,863 | 18.4 |
| Insurance agencies and brokerages | 174 | 1,110 | 6.4 |
| Physician practices | 171 | 8,134 | 47.6 |
| Landscaping services | 162 | 1,092 | 6.7 |
| Law offices | 146 | 787 | 5.4 |
| Drinking places | 131 | 967 | 7.4 |
| Plumbing, heating and air-conditioning contractors | 130 | 1,715 | 13.2 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Business phone service in Tremont
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 Tremont 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.
A 20-person team is the benchmark here, the rounded average establishment size in the Peoria, IL metro area. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $600.00 a month and Ooma Office Pro $499.00. Callata comes to $399.00 a month for 20 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 | $399.00 | $4,788.00 |
| Quo (Starter) | $19.00 per user | $380.00 | $4,560.00 |
| Nextiva (Core) | $23.00 per user | $460.00 | $5,520.00 |
| Ooma (Office Pro) | $24.95 per user | $499.00 | $5,988.00 |
| Dialpad (Standard) | $27.00 per user | $540.00 | $6,480.00 |
| RingCentral (RingEX Core) | $30.00 per user | $600.00 | $7,200.00 |
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 Tremont, IL?
309. All exchanges NANPA lists for Tremont are in 309.
How many phone companies have exchanges in Tremont?
2, holding 3 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Tremont 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 Tremont?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 20 users come to $399.00 a month. For comparison, 20 users on RingCentral RingEX Core list at $600.00 a month (checked September 28, 2026).