CallataGuidesGet a local business phone number in Monroe, OH
Monroe's area code, prefixes and carriers from NANPA records, and how to put a Monroe number in front of your customers.
- Area code
- 513
- Exchanges
- 6NANPA-assigned
- Carriers
- 6
- Population
- 16,609Census 2024 est.
Monroe area codes
Monroe township is a Census town in Miami County, Ohio, with an estimated 16,609 residents in 2024. All 6 exchanges NANPA lists for its rate center are in area code 513. 513 is part of an overlay with 283, so a new local number in Monroe may carry any of those codes depending on which have numbers available. Monroe is in the Eastern time zone.
According to NANPA's dialing-plan data, local calls within 513 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 |
|---|---|---|---|---|---|
| 513 | 6 | 100% | 1947 | 283 | Eastern |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Phone carriers in Monroe
6 carriers hold the 6 exchanges assigned to Monroe's rate center. Cincinnati Bell Extended Territories LLC - Oh has the most, with 1. 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 |
|---|---|---|
| Cincinnati Bell Extended Territories LLC - Oh | 1 | 17% |
| Paetec Itel, LLC | 1 | 17% |
| Level 3 Communications, LLC - Oh | 1 | 17% |
| Peerless Network of Ohio, LLC - Oh | 1 | 17% |
| Ohio Bell Tel CO | 1 | 17% |
| Onvoy, LLC - Oh | 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.
Exchanges (NPA-NXX) assigned in Monroe
A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Monroe. The earliest assignment date recorded in the file for these codes is 2003. 1 of the 6 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 513 | 360, 402, 438, 506, 539, 606 |
Source: NANPA utilized central office code file.
When Monroe's exchanges were assigned
Assignment dates show when each block of Monroe numbers was added to the local supply.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 1 | 20% |
| 2010s | 3 | 60% |
| 2020s | 1 | 20% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
What makes a number local to Monroe
What a caller sees as "local" is the area code plus prefix. In Monroe, those come from the MONROE rate center, as recorded by NANPA.
New local numbers are drawn from carrier inventory, so the exact 513 numbers available change over time; porting an existing number is free.
Businesses around Monroe
Monroe is part of the Dayton-Kettering-Beavercreek, OH metro area, home to 822,000 people in 2024. County Business Patterns counted 16,372 business establishments in the Dayton, OH metro area in 2023, employing 330,420 people. The largest sectors by establishment count are retail trade (2,323), health care and social assistance (2,284), and other services (except public administration) (1,787).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Limited-service restaurants | 758 | 15,471 | 20.4 |
| Physician practices | 518 | 8,387 | 16.2 |
| Full-service restaurants | 475 | 13,377 | 28.2 |
| Insurance agencies and brokerages | 277 | 1,327 | 4.8 |
| Landscaping services | 250 | 1,986 | 7.9 |
| Dental offices | 242 | 2,384 | 9.9 |
| Law offices | 231 | 1,671 | 7.2 |
| Plumbing, heating and air-conditioning contractors | 224 | 2,670 | 11.9 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Business phone service in Monroe
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 Monroe, 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 20-person team is the benchmark here, the rounded average establishment size in the Dayton, OH metro area. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $600.00 a month and Ooma Office Pro $499.00. On Callata the same 20 people cost $399.00 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 | $399.00 | $4,788.00 |
| Quo (Starter) | $19.00 per user | $380.00 | $4,560.00 |
| Nextiva (Core) | $23.00 per user | $460.00 | $5,520.00 |
| Ooma (Office Pro) | $24.95 per user | $499.00 | $5,988.00 |
| Dialpad (Standard) | $27.00 per user | $540.00 | $6,480.00 |
| RingCentral (RingEX Core) | $30.00 per user | $600.00 | $7,200.00 |
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 Monroe, OH?
513. All exchanges NANPA lists for Monroe are in 513.
How many phone companies have exchanges in Monroe?
6, holding 6 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Monroe 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 Monroe?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 20 users come to $399.00 a month. For comparison, 20 users on RingCentral RingEX Core list at $600.00 a month (checked September 28, 2026).