Get a local business phone number in Grayslake, IL

What area code is Grayslake, IL?

With 21,262 residents in the Census 2024 estimate, Grayslake sits in Lake County, Illinois. NANPA lists 13 exchanges for its rate center across 2 area codes; 847 has the most (8, 62%). 847 is part of an overlay with 224, so a new local number in Grayslake may carry any of those codes depending on which have numbers available. Grayslake 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 Grayslake phone exchanges

5 carriers hold the 13 exchanges assigned to Grayslake's rate center. Illinois Bell Tel CO has the most, with 6. 11 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.

Grayslake phone prefixes

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Grayslake's rate center (GRAYSLAKE). The earliest assignment date recorded in the file for these codes is 2011. 3 of the 13 were assigned in 2020 or later.

When Grayslake's exchanges were assigned

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

Rate centers and local calling in Grayslake

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

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

Businesses around Grayslake

Grayslake 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 Grayslake 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 Grayslake 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.

Per-seat phone plans multiply by headcount. For the rounded average establishment size in the Chicago, IL-IN metro area, 17 users on RingCentral RingEX Core come to $510.00 a month and on Ooma Office Pro $424.15, at month-to-month list prices checked September 28, 2026. Callata comes to $339.00 a month for 17 users ($99 a month with 5 users included, then $20 per additional user), below both.