CallataGuidesGet a local business phone number in Colfax, IA
Colfax's area code, prefixes and carriers from NANPA records, and how to put a Colfax number in front of your customers.
- Area code
- 515
- Exchanges
- 3NANPA-assigned
- Carriers
- 3
- Population
- 2,305Census 2024 est.
What area code is Colfax, IA?
With 2,305 residents in the Census 2024 estimate, Colfax sits in Jasper County, Iowa. All 3 exchanges NANPA lists for its rate center are in area code 515. Colfax 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 | 3 | 100% | 1947 | none | Central |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Colfax exchanges by carrier
3 carriers hold the 3 exchanges assigned to Colfax's rate center. Fractel, LLC 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 Colfax can come from any of these blocks; once it is yours, porting lets it move between providers.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Fractel, LLC | 1 | 33% |
| Qwest Corporation | 1 | 33% |
| Onvoy, LLC - Ia | 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.
Colfax phone prefixes
A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Colfax. The earliest assignment date recorded in the file for these codes is 2012. None were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 515 | 529, 674, 800 |
Source: NANPA utilized central office code file.
Rate centers and local calling in Colfax
What a caller sees as "local" is the area code plus prefix. In Colfax, those come from the COLFAX rate center, as recorded by NANPA.
New local numbers are drawn from carrier inventory, so the exact 515 numbers available change over time; porting an existing number is free.
Who does business near Colfax
Colfax is part of the Des Moines-West Des Moines, IA metro area, home to 754,000 people in 2024. County Business Patterns counted 18,946 business establishments in the Des Moines, IA metro area in 2023, employing 364,757 people. The largest sectors by establishment count are retail trade (2,187), professional, scientific, and technical services (2,098), and health care and social assistance (2,060).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Full-service restaurants | 531 | 11,950 | 22.5 |
| Limited-service restaurants | 524 | 10,539 | 20.1 |
| Offices of real estate agents and brokers | 474 | 948 | 2.0 |
| Insurance agencies and brokerages | 425 | 3,009 | 7.1 |
| Law offices | 364 | 2,502 | 6.9 |
| Landscaping services | 298 | 3,334 | 11.2 |
| Residential remodelers | 278 | 848 | 3.1 |
| Physician practices | 275 | 7,439 | 27.1 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
A Colfax number on Callata
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 Colfax, 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 the Des Moines, IA metro area, 19 users on RingCentral RingEX Core come to $570.00 a month and on Ooma Office Pro $474.05, at month-to-month list prices checked September 28, 2026. On Callata the same 19 people cost $379.00 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 | $379.00 | $4,548.00 |
| Quo (Starter) | $19.00 per user | $361.00 | $4,332.00 |
| Nextiva (Core) | $23.00 per user | $437.00 | $5,244.00 |
| Ooma (Office Pro) | $24.95 per user | $474.05 | $5,688.60 |
| Dialpad (Standard) | $27.00 per user | $513.00 | $6,156.00 |
| RingCentral (RingEX Core) | $30.00 per user | $570.00 | $6,840.00 |
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 Colfax, IA?
515. All exchanges NANPA lists for Colfax are in 515.
How many phone companies have exchanges in Colfax?
3, holding 3 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Colfax 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 Colfax?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 19 users come to $379.00 a month. For comparison, 19 users on RingCentral RingEX Core list at $570.00 a month (checked September 28, 2026).