CallataGuidesGet a local business phone number in Jefferson, IA
Jefferson's area code, prefixes and carriers from NANPA records, and how to put a Jefferson number in front of your customers.
- Area code
- 515
- Exchanges
- 4NANPA-assigned
- Carriers
- 4
- Population
- 4,148Census 2024 est.
Area codes in Jefferson
With 4,148 residents in the Census 2024 estimate, Jefferson sits in Greene County, Iowa. All 4 exchanges NANPA lists for its rate center are in area code 515. Jefferson is in the Central time zone.
According to NANPA's dialing-plan data, local calls within 515 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 |
|---|---|---|---|---|---|
| 515 | 4 | 100% | 1947 | none | Central |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Phone carriers in Jefferson
4 carriers hold the 4 exchanges assigned to Jefferson's rate center. United States Cellular - Ia has the most, with 1. 3 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Jefferson can come from any of these blocks; once it is yours, porting lets it move between providers.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| United States Cellular - Ia | 1 | 25% |
| Jefferson Tel. CO. | 1 | 25% |
| Cellco Partnership d/b/a Verizon Wireless - Ia | 1 | 25% |
| T-mobile USA, INC. | 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 Jefferson
A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Jefferson. The earliest assignment date recorded in the file for these codes is 2024. 1 of the 4 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 515 | 370, 386, 391, 796 |
Source: NANPA utilized central office code file.
What makes a number local to Jefferson
NANPA ties every exchange to a rate center. For Jefferson that is JEFFERSON, so a number from one of these exchanges reads as local to people in and around Jefferson.
Keeping an existing Jefferson number costs nothing on Callata, because porting is free; a new number depends on what carriers have open in 515 when you pick it.
The local business market
Jefferson is outside any Census metro or micropolitan area, so the figures below are statewide. County Business Patterns counted 83,321 business establishments in Iowa in 2023, employing 1,415,652 people. The largest sectors by establishment count are retail trade (10,970), other services (except public administration) (9,184), and health care and social assistance (9,092).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Full-service restaurants | 2,459 | 44,032 | 17.9 |
| Limited-service restaurants | 2,095 | 41,152 | 19.6 |
| Insurance agencies and brokerages | 1,993 | 9,839 | 4.9 |
| Landscaping services | 1,242 | 7,493 | 6.0 |
| Law offices | 1,212 | 6,216 | 5.1 |
| Offices of real estate agents and brokers | 1,195 | 2,293 | 1.9 |
| Residential remodelers | 1,156 | 3,332 | 2.9 |
| Plumbing, heating and air-conditioning contractors | 1,108 | 14,647 | 13.2 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Business phone service in Jefferson
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.
Porting a number you already use in Jefferson 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 Iowa, 17 users on RingCentral RingEX Core come to $510.00 a month and on Ooma Office Pro $424.15, at month-to-month list prices checked September 28, 2026. Callata comes to $339.00 a month for 17 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 | $339.00 | $4,068.00 |
| Quo (Starter) | $19.00 per user | $323.00 | $3,876.00 |
| Nextiva (Core) | $23.00 per user | $391.00 | $4,692.00 |
| Ooma (Office Pro) | $24.95 per user | $424.15 | $5,089.80 |
| Dialpad (Standard) | $27.00 per user | $459.00 | $5,508.00 |
| RingCentral (RingEX Core) | $30.00 per user | $510.00 | $6,120.00 |
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 Jefferson, IA?
515. All exchanges NANPA lists for Jefferson are in 515.
How many phone companies have exchanges in Jefferson?
4, holding 4 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Jefferson 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 Jefferson?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 17 users come to $339.00 a month. For comparison, 17 users on RingCentral RingEX Core list at $510.00 a month (checked September 28, 2026).