Get a local business phone number in Lake Forest, IL

What area code is Lake Forest, IL?

With 19,642 residents in the Census 2024 estimate, Lake Forest sits in Lake County, Illinois. NANPA lists 27 exchanges for its rate center across 2 area codes; 847 has the most (16, 59%). 847 is part of an overlay with 224, so a new local number in Lake Forest may carry any of those codes depending on which have numbers available. Lake Forest is in the Central time zone.

According to NANPA's dialing-plan data, local calls within 847 are dialed as 1 plus ten digits and toll calls as 1 plus ten digits.

Who holds Lake Forest phone exchanges

8 carriers hold the 27 exchanges assigned to Lake Forest's rate center. Illinois Bell Tel CO has the most, with 13. 20 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. Holding a code means NANPA assigned that block of numbers to the carrier for this rate center; individual numbers may since have been ported elsewhere.

Lake Forest phone prefixes

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Lake Forest's rate center (LAKEFOREST). The earliest assignment date recorded in the file for these codes is 2001. 2 of the 27 were assigned in 2020 or later.

When Lake Forest's exchanges were assigned

The table groups Lake Forest's exchanges by the decade NANPA recorded them as assigned.

Rate centers and local calling in Lake Forest

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

New local numbers are drawn from carrier inventory, so the exact 847 numbers available change over time; porting an existing number is free.

Businesses around Lake Forest

Lake Forest 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).

A Lake Forest number on Callata

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.

Porting a number you already use in Lake Forest is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.

AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–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. Callata comes to $339.00 a month for 17 users ($99 a month with 5 users included, then $20 per additional user), below both.