Get a local business phone number in Deerfield, IL

What area code is Deerfield, IL?

Deerfield village is a Census place in Lake County, Illinois, with an estimated 19,138 residents in 2024. NANPA lists 39 exchanges for its rate center across 2 area codes; 224 has the most (20, 51%). 224 is part of an overlay with 847, so a new local number in Deerfield may carry any of those codes depending on which have numbers available. Deerfield is in the Central time zone.

According to NANPA's dialing-plan data, local calls within 224 are dialed as 1 plus ten digits and toll calls as 1 plus ten digits.

Deerfield exchanges by carrier

11 carriers hold the 39 exchanges assigned to Deerfield's rate center. Illinois Bell Tel CO has the most, with 14. 31 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Deerfield can come from any of these blocks; once it is yours, porting lets it move between providers.

Deerfield phone prefixes

A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Deerfield. The earliest assignment date recorded in the file for these codes is 2001. 5 of the 39 were assigned in 2020 or later.

When Deerfield's exchanges were assigned

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

What makes a number local to Deerfield

What a caller sees as "local" is the area code plus prefix. In Deerfield, those come from the DEERFIELD rate center, as recorded by NANPA.

New local numbers are drawn from carrier inventory, so the exact 224 numbers available change over time; porting an existing number is free.

Businesses around Deerfield

Deerfield is part of the Chicago-Naperville-Elgin, IL-IN metro area, home to 9.4 million people in 2024. County Business Patterns counted 248,519 business establishments in the Chicago, IL-IN metro area in 2023, employing 4,285,971 people. The largest sectors by establishment count are professional, scientific, and technical services (32,828), health care and social assistance (29,768), and retail trade (25,308).

Business phone service in Deerfield

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 Deerfield, 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 17-person team is the benchmark here, the rounded average establishment size in the Chicago, IL-IN metro area. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $510.00 a month and Ooma Office Pro $424.15. On Callata the same 17 people cost $339.00 a month, less than either per-seat plan.