815 area code
Rockford area, Central Time.Area code 815 covers Rockford, Joliet, Kankakee and 195 more places in Illinois, on Central Time. 779 covers the same area.
Right now in Rockford
Central Time (CST, UTC-6; CDT, UTC-5 in summer)
Calling hours: Every day, 8 AM to 9 PM (the federal rule)
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Where 815 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 815 has 198. Each one's share is how many 815 numbers start there. Its biggest metro area is Chicago-Naperville-Elgin, IL-IN.
- Rockford11%
- Joliet8%
- Kankakee4%
- Woodstock4%
- DeKalb3%
- Freeport2%
- McHenry2%
- Lockport2%
- Crystal Lake2%
Also: Plainfield, Sterling, Morris, Ottawa, Dixon, LaSalle, Oglesby, Princeton, Minooka, Belvidere, New Lenox, Streator + 177 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call an 815 number?
Sales calls to homes and cell phones have legal hours, set by the federal rule. Hold every 815 number to them, since you can't tell a work line from a personal cell.
What applies to 815Every 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
815 and 779
815 is one of the original area codes from 1947. 815 and 779 cover the same area, so new numbers can get either code and neighbors can have different area codes. 815 holds 69% of the area's exchanges; 779 holds the rest. Local calls take all 10 digits.
- 1947815 starts
- 2007779 overlay
Source: NANPA area code database
Calling a list of 815 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.
815 area code FAQ
What area code is 815?
815 is an Illinois area code for Rockford, Joliet, Kankakee, Woodstock and 194 more places.
What time zone is the 815 area code in?
Central Time (CST, UTC-6; CDT, UTC-5 in summer).
Is 779 the same as 815?
Same area, different code. 815 and 779 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 815 numbers?
Every day, 8 AM to 9 PM, local time, under the federal rule.
When did the 815 area code start?
In 1947: it's one of the original area codes.
Calling 815 numbers? Reach more of them.
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