224 area code
Northbrook area, Central Time.Area code 224 covers Northbrook, Arlington Heights, Des Plaines and 37 more places in Illinois, on Central Time. 847 covers the same area.
Right now in Northbrook
Central Time (CST, UTC-6; CDT, UTC-5 in summer)
Calling hours: Every day, 8 AM to 9 PM (the federal rule)
Small talk
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Where 224 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 224 has 40. Each one's share is how many 224 numbers start there. Its biggest metro area is Chicago-Naperville-Elgin, IL-IN.
- Northbrook12%
- Arlington Heights12%
- Des Plaines8%
- Elgin7%
- Waukegan6%
- Algonquin6%
- Deerfield3%
- Barrington3%
- Elk Grove3%
- Wheeling2%
- Glenview2%
- Skokie2%
Also: Libertyville, Round Lake, Roselle, Palatine, Lake Forest, Evanston, Mundelein, Half Day, Zion, Dundee, Fox Lake, Huntley + 16 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 224 number?
Sales calls to homes and cell phones have legal hours, set by the federal rule. Hold every 224 number to them, since you can't tell a work line from a personal cell.
What applies to 224Every day, 8 AM to 9 PM
- Federal (TCPA and FTC rule)Every day, 8 AM to 9 PMCalls to residential and mobile numbers. Most calls to businesses are exempt from the FTC's rule.47 CFR 64.1200(c)(1); 16 CFR 310.4(c) (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
224 and 847
224 went into service on January 5, 2002. 224 and 847 cover the same area, so new numbers can get either code and neighbors can have different area codes. 224 holds 44% of the area's exchanges; 847 holds the most. Local calls take all 10 digits.
- 1996847 overlay
- 2002224 starts
Source: NANPA area code database
Calling a list of 224 numbers?
Paste it into the free phone number validator. It checks every number, finds each one's time zone and sorts the list by who you can call right now.
224 area code FAQ
What area code is 224?
224 is an Illinois area code for Northbrook, Arlington Heights, Des Plaines, Elgin and 36 more places.
What time zone is the 224 area code in?
Central Time (CST, UTC-6; CDT, UTC-5 in summer).
Is 847 the same as 224?
Same area, different code. 224 and 847 cover the same area (an overlay), so new numbers can get any of them and local calls take all 10 digits.
What are the calling hours for 224 numbers?
Every day, 8 AM to 9 PM, local time, under the federal rule.
When did the 224 area code start?
On January 5, 2002.
Calling 224 numbers? Reach more of them.
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