CallataGuidesGet a local business phone number in Green Bay, WI
Green Bay's area codes, prefixes and carriers from NANPA records, and how to put a Green Bay number in front of your customers.
- Area code
- 920 / 274
- Exchanges
- 115NANPA-assigned
- Carriers
- 36
- Population
- 106,311Census 2024 est.
Area codes in Green Bay
With 106,311 residents in the Census 2024 estimate, Green Bay sits in Brown County, Wisconsin. NANPA lists 115 exchanges for its rate center across 2 area codes; 920 has the most (111, 97%). 920 is part of an overlay with 274, so a new local number in Green Bay may carry any of those codes depending on which have numbers available. Green Bay is in the Central time zone.
According to NANPA's dialing-plan data, local calls within 920 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.
Phone carriers in Green Bay
36 carriers hold the 115 exchanges assigned to Green Bay's rate center. Wisconsin Bell INC has the most, with 34. 69 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Green Bay can come from any of these blocks; once it is yours, porting lets it move between providers.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Wisconsin Bell INC | 34 | 30% |
| New Cell d/b/a Cellcom | 11 | 9.6% |
| Onvoy, LLC - Wi | 6 | 5.2% |
| New Cingular Wireless PCS, LLC - Il | 6 | 5.2% |
| TDS Metrocom, LLC | 5 | 4.3% |
| United States Cellular - Wi | 5 | 4.3% |
| Level 3 Communications, LLC - Wi | 4 | 3.5% |
| Cellco Partnership d/b/a Verizon Wireless - Wi | 4 | 3.5% |
| Paetec Itel, LLC | 4 | 3.5% |
| T-mobile USA, INC. | 3 | 2.6% |
| American Messaging Services, LLC | 3 | 2.6% |
| Net LEC, INC. | 2 | 1.7% |
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 Green Bay
Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Green Bay's rate center (GREEN BAY). The earliest assignment date recorded in the file for these codes is 2001. 13 of the 115 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 274 | 207, 218, 222, 300 |
| 920 | 217, 227, 246, 247, 264, 265, 271, 272, 283, 288, 301, 305, 321, 327, 328, 360, 362, 366, 370, 371, 384, 391, 393, 396, 401, 405, 406, 412, 417, 429, 430, 431, 432, 433, 434, 435, 436, 437, 438, 440, 444, 445, 448, 455, 461, 465, 466, 468, 469, 471, 480, 489, 490, 491, 492, 494, 496, 497, 498, 499, 501, 510, 530, 544, 548, 556, 562, 569, 592, 593, 600, 606, 609, 610, 613, 615, 617, 619, 621, 634, 639, 641, 655, 660, 661, 662, 664, 665, 676, 680, 704, 705, 712, 713, 719, 737, 770, 777, 784, 785, 819, 857, 873, 883, 884, 888, 930, 932, 940, 965, 977 |
Source: NANPA utilized central office code file.
When Green Bay's exchanges were assigned
Assignment dates show when each block of Green Bay numbers was added to the local supply.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 14 | 33% |
| 2010s | 15 | 36% |
| 2020s | 13 | 31% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
Rate centers and local calling in Green Bay
Phone numbers are tied to a rate center, the local calling area used to decide whether a call is local or toll. Green Bay's numbers are rated to the GREEN BAY rate center in NANPA's records. A business number from one of the prefixes above shows up on customers' phones as a Green Bay number.
New local numbers are drawn from carrier inventory, so the exact 920 numbers available change over time; porting an existing number is free.
Who does business near Green Bay
Green Bay is part of the Green Bay, WI metro area, home to 335,000 people in 2024. County Business Patterns counted 7,968 business establishments in the Green Bay, WI metro area in 2023, employing 155,112 people. The largest sectors by establishment count are retail trade (982), health care and social assistance (912), and construction (873).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Full-service restaurants | 257 | 5,288 | 20.6 |
| Limited-service restaurants | 213 | 4,320 | 20.3 |
| Insurance agencies and brokerages | 150 | 871 | 5.8 |
| Physician practices | 144 | — | — |
| Drinking places | 135 | 874 | 6.5 |
| Landscaping services | 124 | 594 | 4.8 |
| Offices of real estate agents and brokers | 114 | 412 | 3.6 |
| Plumbing, heating and air-conditioning contractors | 111 | 1,889 | 17.0 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Setting up a Green Bay business line
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 Green Bay, 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.
The comparison below uses 19 users, the rounded average establishment size in the Green Bay, WI metro area. At list prices checked September 28, 2026, that is $474.05 a month on Ooma Office Pro and $570.00 on RingCentral RingEX Core. 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 Green Bay, WI?
Green Bay has exchanges in 920 and 274; 920 has the most.
How many phone companies have exchanges in Green Bay?
36, holding 115 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Green Bay 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 Green Bay?
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).