Get a local business phone number in Hamilton, OH

Hamilton area codes

Hamilton city is a Census place in Butler County, Ohio, with an estimated 63,953 residents in 2024. NANPA lists 61 exchanges for its rate center across 2 area codes; 513 has the most (55, 90%). 513 is part of an overlay with 283, so a new local number in Hamilton may carry any of those codes depending on which have numbers available. Hamilton 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 Hamilton

16 carriers hold the 61 exchanges assigned to Hamilton's rate center. Cincinnati Bell has the most, with 26. 44 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.

Exchanges (NPA-NXX) assigned in Hamilton

A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Hamilton. The earliest assignment date recorded in the file for these codes is 2001. 13 of the 61 were assigned in 2020 or later.

When Hamilton's exchanges were assigned

Assignment dates show when each block of Hamilton numbers was added to the local supply.

What makes a number local to Hamilton

Phone numbers are tied to a rate center, the local calling area used to decide whether a call is local or toll. Hamilton's numbers are rated to the HAMILTON rate center in NANPA's records. A business number from one of the prefixes above shows up on customers' phones as a Hamilton number.

If your business already has a Hamilton number, porting it to Callata is free and keeps it on your cards, listings and vehicles.

Businesses around Hamilton

Hamilton 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).

Business phone service in Hamilton

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 Hamilton, 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 21-person team is the benchmark here, the rounded average establishment size in the Cincinnati, OH-KY-IN metro area. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $630.00 a month and Ooma Office Pro $523.95. On Callata the same 21 people cost $419.00 a month, less than either per-seat plan.