CallataGuidesGet a local business phone number in Grundy Center, IA
Grundy Center's area code, prefixes and carriers from NANPA records, and how to put a Grundy Center number in front of your customers.
- Area code
- 319
- Exchanges
- 5NANPA-assigned
- Carriers
- 4
- Population
- 2,821Census 2024 est.
What area code is Grundy Center, IA?
Grundy Center, in Grundy County, Iowa, had a Census-estimated population of 2,821 in July 2024. All 5 exchanges NANPA lists for its rate center are in area code 319. Grundy Center is in the Central time zone.
According to NANPA's dialing-plan data, local calls within 319 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 |
|---|---|---|---|---|---|
| 319 | 5 | 100% | 1947 | none | Central |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Grundy Center exchanges by carrier
4 carriers hold the 5 exchanges assigned to Grundy Center's rate center. Windstream Iowa Communications, INC. - Systems has the most, with 2. 4 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 |
|---|---|---|
| Windstream Iowa Communications, INC. - Systems | 2 | 40% |
| Heart of Iowa Ventures, L.l.c. - Ia | 1 | 20% |
| Cellco Partnership d/b/a Verizon Wireless - Ia | 1 | 20% |
| Aureon Communications, LLC | 1 | 20% |
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.
Grundy Center phone prefixes
These are the central office codes NANPA records for Grundy Center. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2003. 1 of the 5 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 319 | 245, 418, 823, 824, 825 |
Source: NANPA utilized central office code file.
When Grundy Center's exchanges were assigned
Assignment dates show when each block of Grundy Center numbers was added to the local supply.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 1 | 33% |
| 2010s | 1 | 33% |
| 2020s | 1 | 33% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
Rate centers and local calling in Grundy Center
What a caller sees as "local" is the area code plus prefix. In Grundy Center, those come from the GRUNDY CTR rate center, as recorded by NANPA.
New local numbers are drawn from carrier inventory, so the exact 319 numbers available change over time; porting an existing number is free.
Who does business near Grundy Center
Grundy Center is part of the Waterloo-Cedar Falls, IA metro area, home to 170,000 people in 2024. County Business Patterns counted 3,956 business establishments in the Waterloo, IA metro area in 2023, employing 74,813 people. The largest sectors by establishment count are retail trade (567), health care and social assistance (499), and other services (except public administration) (443).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Limited-service restaurants | 115 | 2,314 | 20.1 |
| Full-service restaurants | 106 | 2,649 | 25.0 |
| Insurance agencies and brokerages | 93 | 421 | 4.5 |
| Physician practices | 73 | — | — |
| Landscaping services | 59 | 275 | 4.7 |
| General automotive repair shops | 53 | 229 | 4.3 |
| Drinking places | 52 | 441 | 8.5 |
| Child day care services | 50 | 714 | 14.3 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
A Grundy Center number on Callata
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.
If you already have a number in Grundy Center, 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.
A 19-person team is the benchmark here, the rounded average establishment size in the Waterloo, IA metro area. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $570.00 a month and Ooma Office Pro $474.05. 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 Grundy Center, IA?
319. All exchanges NANPA lists for Grundy Center are in 319.
How many phone companies have exchanges in Grundy Center?
4, holding 5 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Grundy Center 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 Grundy Center?
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).