CallataGuidesGet a local business phone number in Mason, OH
Mason's area codes, prefixes and carriers from NANPA records, and how to put a Mason number in front of your customers.
- Area code
- 513 / 283
- Exchanges
- 23NANPA-assigned
- Carriers
- 9
- Population
- 36,046Census 2024 est.
Mason area codes
Mason, in Warren County, Ohio, had a Census-estimated population of 36,046 in July 2024. NANPA lists 23 exchanges for its rate center across 2 area codes; 513 has the most (21, 91%). 513 is part of an overlay with 283, so a new local number in Mason may carry any of those codes depending on which have numbers available. Mason 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.
Phone carriers in Mason
9 carriers hold the 23 exchanges assigned to Mason's rate center. Brightspeed of Northwest Ohio, INC. has the most, with 7. 17 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 |
|---|---|---|
| Brightspeed of Northwest Ohio, INC. | 7 | 30% |
| Onvoy, LLC - Oh | 5 | 22% |
| Cincinnati Bell Extended Territories LLC - Oh | 3 | 13% |
| Level 3 Communications, LLC - Oh | 2 | 8.7% |
| Level 3 Telecom of Ohio, LLC - Oh | 2 | 8.7% |
| Nuso, LLC | 1 | 4.3% |
| Mcimetro Access Transmission Services LLC - Oh | 1 | 4.3% |
| Centurylink Communications, LLC | 1 | 4.3% |
| Bandwidth.com CLEC, LLC - Oh | 1 | 4.3% |
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 Mason
A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Mason. The earliest assignment date recorded in the file for these codes is 2003. 5 of the 23 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 283 | 210, 236 |
| 513 | 204, 229, 234, 336, 339, 398, 445, 459, 466, 486, 492, 548, 573, 622, 637, 701, 754, 770, 848, 972, 994 |
Source: NANPA utilized central office code file.
When Mason's exchanges were assigned
Assignment dates show when each block of Mason numbers was added to the local supply.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 2 | 18% |
| 2010s | 4 | 36% |
| 2020s | 5 | 45% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
How local numbers work in Mason
What a caller sees as "local" is the area code plus prefix. In Mason, those come from the MASON 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.
The local business market
Mason is part of the Cincinnati, OH-KY-IN metro area, home to 2.3 million people in 2024. County Business Patterns counted 48,255 business establishments in the Cincinnati, OH-KY-IN metro area in 2023, employing 1,030,698 people. The largest sectors by establishment count are retail trade (6,169), health care and social assistance (5,605), and accommodation and food services (4,958).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Limited-service restaurants | 1,896 | 39,771 | 21.0 |
| Full-service restaurants | 1,601 | 43,114 | 26.9 |
| Physician practices | 1,003 | 21,885 | 21.8 |
| Offices of real estate agents and brokers | 801 | 1,903 | 2.4 |
| Landscaping services | 797 | 6,520 | 8.2 |
| Insurance agencies and brokerages | 782 | 4,447 | 5.7 |
| Law offices | 749 | 5,610 | 7.5 |
| Dental offices | 745 | 6,356 | 8.5 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Setting up a Mason business line
Callata is a business phone system priced at $99 a month with 5 users included, then $20 per additional user. Callata Office includes up to 3 local business numbers, unlimited inbound calling, 1,500 pooled outbound US and Canada minutes per user each month, a browser softphone that can also ring your cell, voicemail with transcription, call recording with AI summaries, business-hours routing and E911 on every number.
If you already have a number in Mason, 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 21 users, the rounded average establishment size in the Cincinnati, OH-KY-IN metro area. At list prices checked September 28, 2026, that is $523.95 a month on Ooma Office Pro and $630.00 on RingCentral RingEX Core. On Callata the same 21 people cost $419.00 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 | $419.00 | $5,028.00 |
| Quo (Starter) | $19.00 per user | $399.00 | $4,788.00 |
| Nextiva (Core) | $23.00 per user | $483.00 | $5,796.00 |
| Ooma (Office Pro) | $24.95 per user | $523.95 | $6,287.40 |
| Dialpad (Standard) | $27.00 per user | $567.00 | $6,804.00 |
| RingCentral (RingEX Core) | $30.00 per user | $630.00 | $7,560.00 |
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 Mason, OH?
Mason has exchanges in 513 and 283; 513 has the most.
How many phone companies have exchanges in Mason?
9, holding 23 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Mason 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 Mason?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 21 users come to $419.00 a month. For comparison, 21 users on RingCentral RingEX Core list at $630.00 a month (checked September 28, 2026).