Get a local business phone number in Colby, WI
Colby's area codes, prefixes and carriers from NANPA records, and how to put a Colby number in front of your customers.
- Area code
- 715 / 534
- Exchanges
- 6NANPA-assigned
- Carriers
- 5
- Population
- 1,959Census 2024 est.
Area codes in Colby
Colby, in Clark County, Wisconsin, had a Census-estimated population of 1,959 in July 2024. NANPA lists 6 exchanges for its rate center across 2 area codes; 715 has the most (5, 83%). 715 is part of an overlay with 534, so a new local number in Colby may carry any of those codes depending on which have numbers available. Colby is in the Central time zone.
According to NANPA's dialing-plan data, local calls within 715 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.
Phone carriers in Colby
5 carriers hold the 6 exchanges assigned to Colby's rate center. Level 3 Communications, LLC - Wi has the most, with 2. 5 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. The table counts codes by the operating company NANPA assigned them to, not by who serves each number today.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Level 3 Communications, LLC - Wi | 2 | 33% |
| Ton80 Communications, LLC | 1 | 17% |
| Frontier North INC. - Wi | 1 | 17% |
| Onvoy, LLC - Wi | 1 | 17% |
| New Cingular Wireless PCS, LLC - Il | 1 | 17% |
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 Colby
A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Colby. The earliest assignment date recorded in the file for these codes is 2002. 2 of the 6 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 534 | 227 |
| 715 | 223, 316, 390, 613, 721 |
Source: NANPA utilized central office code file.
When Colby's exchanges were assigned
The table groups Colby's exchanges by the decade NANPA recorded them as assigned.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 1 | 25% |
| 2010s | 1 | 25% |
| 2020s | 2 | 50% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
How local numbers work in Colby
Phone numbers are tied to a rate center, the local calling area used to decide whether a call is local or toll. Colby's numbers are rated to the COLBY rate center in NANPA's records. A business number from one of the prefixes above shows up on customers' phones as a Colby number.
If your business already has a Colby number, porting it to Callata is free and keeps it on your cards, listings and vehicles.
Who does business near Colby
Colby is outside any Census metro or micropolitan area, so the figures below are statewide. County Business Patterns counted 144,774 business establishments in Wisconsin in 2023, employing 2,642,958 people. The largest sectors by establishment count are retail trade (18,044), health care and social assistance (17,592), and accommodation and food services (15,530).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Full-service restaurants | 4,988 | 87,044 | 17.5 |
| Limited-service restaurants | 3,925 | 76,596 | 19.5 |
| Physician practices | 3,107 | 63,015 | 20.3 |
| Drinking places | 2,739 | 18,206 | 6.6 |
| Insurance agencies and brokerages | 2,587 | 12,120 | 4.7 |
| Landscaping services | 2,490 | 13,641 | 5.5 |
| Residential remodelers | 2,142 | 8,173 | 3.8 |
| Offices of real estate agents and brokers | 2,071 | 5,215 | 2.5 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Setting up a Colby business line
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 Colby 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 Wisconsin, 18 users on RingCentral RingEX Core come to $540.00 a month and on Ooma Office Pro $449.10, at month-to-month list prices checked September 28, 2026. Callata comes to $359.00 a month for 18 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 | $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 Colby, WI?
Colby has exchanges in 715 and 534; 715 has the most.
How many phone companies have exchanges in Colby?
5, holding 6 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Colby 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 Colby?
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).