Get a local business phone number in Northfield, MN

Northfield area codes

Northfield, in Rice County, Minnesota, had a Census-estimated population of 21,316 in July 2024. All 14 exchanges NANPA lists for its rate center are in area code 507. 507 is part of an overlay with 924, so a new local number in Northfield may carry any of those codes depending on which have numbers available. Northfield is in the Central time zone.

According to NANPA's dialing-plan data, local calls within 507 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.

Northfield exchanges by carrier

5 carriers hold the 14 exchanges assigned to Northfield's rate center. Onvoy, LLC - MN has the most, with 5. 12 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.

Northfield phone prefixes

A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Northfield. The earliest assignment date recorded in the file for these codes is 2001. 1 of the 14 were assigned in 2020 or later.

When Northfield's exchanges were assigned

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

How local numbers work in Northfield

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

New local numbers are drawn from carrier inventory, so the exact 507 numbers available change over time; porting an existing number is free.

The local business market

Northfield is part of the Faribault-Northfield, MN micropolitan area, home to 69,025 people in 2024. County Business Patterns counted 1,600 business establishments in the Faribault, MN micropolitan area in 2023, employing 25,126 people. The largest sectors by establishment count are construction (262), other services (except public administration) (192), and health care and social assistance (187).

Business phone service in Northfield

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 Northfield, 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 16-person team is the benchmark here, the rounded average establishment size in the Faribault, MN micropolitan area. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $480.00 a month and Ooma Office Pro $399.20. On Callata the same 16 people cost $319.00 a month, less than either per-seat plan.