Area code
Area code 224 — Northbrook, IL
Illinois · in service since January 5, 2002
Area code 224 covers parts of Illinois; the place with the most of its prefixes is Northbrook. It is an overlay: 847 serves the same area, so neighbors can have different area codes.
Overlay, same area: 847
Local time in Northbrook
Spam reports from Sep 23 – Oct 22, 2026
Average #167 of 461 codes
551 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zoneCentral Time
- Local calls1 + 10 digits
- Prefixes609 assigned
- Runs out~3Q 2033
- Unwanted call?Block & report
Spam call reports about 224 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 50 |
| Sep 14 | 125 |
| Sep 21 | 108 |
| Sep 28 | 111 |
| Oct 5 | 136 |
| Oct 12 | 124 |
| Oct 19 (4 days) | 117 |
Compared with all codes
- Robocalls
- 68%all codes 75%
- Callers with the same code
- 18%all codes 35%
- Rank by complaints
- #167of 461 · middle half
- FCC complaints, Oct 2025 – Sep 2026
- 8822 about text messages
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Reducing your debt (credit cards, mortgage, student loans) | 160 21% | |
| Calls pretending to be government, businesses, or family and friends | 88 11% | |
| Dropped call or no message | 71 9% | |
| Medical & prescriptions | 23 3% | |
| Home improvement & cleaning | 9 1% | |
| Warranties & protection plans | 7 1% |
Where the people who complained live
Sep 11 – Oct 22, 2026
| State | Complaints | |
|---|---|---|
| Illinois | 315 41% | |
| Florida | 52 7% | |
| California | 50 6% | |
| Texas | 41 5% | |
| Virginia | 23 3% |
October 2026 (partial) report · most reported
Consumer reports, not verified by the FTC · source
Source: FTC Do Not Call complaints created Sep 11 – Oct 22, 2026. They are reported by consumers and are not verified by the FTC; caller ID can be spoofed (how we count).
Source: FCC Consumer Complaints data, unwanted calls filed Oct 1, 2025 – Sep 30, 2026, by caller ID; not verified by the FCC.
Area code 224 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| NORTHBROOK | Northbrook | Cook County | 72 |
| ARLIGTNHTS | Arlington Heights | Cook County | 70 |
| DESPLAINES | Des Plaines | Cook County | 48 |
| ELGIN | Elgin | spans 2 counties | 44 |
| WAUKEGAN | Waukegan | Lake County | 38 |
| ALGONQUIN | Algonquin | spans 2 counties | 36 |
| DEERFIELD | Deerfield | spans 2 counties | 20 |
| BARRINGTON | Barrington | spans 2 counties | 19 |
| ELK GROVE | — | — | 18 |
| WHEELING | Wheeling | spans 2 counties | 15 |
Plus 31 smaller exchange areas.
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
NANPA record
- Location
- Illinois
- Assigned by NANPA
- May 1, 1998
- Local dialing
- 1 + 10 digits (NANPA: 1+10D)
- NANPA planning letters
- PL-305, PL-157, PL-127
Source: NANPA, NPA database of Oct 24, 2026.
Is 224 running out of numbers?
Previous forecast (October 2025): 2032, moved later by 1 year.
Forecast exhaust year by edition
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 224 prefixes
The five largest of 29 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| T-Mobile USA, Inc. | 138 23% | |
| New Cingular Wireless PCS, LLC | 92 15% | |
| Verizon Wireless | 76 12% | |
| Onvoy, LLC | 67 11% | |
| Illinois Bell Tel Co. | 34 6% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 224
What area code is 224?
An Illinois area code, in service since January 5, 2002.
Where is 224 area code, and what time zone is it in?
Northbrook, IL; Central Time.
Why am I getting spam calls from 224?
551 FTC complaints from Sep 23 – Oct 22, 2026, most often about debt reduction (not verified by the FTC; caller ID can be spoofed).
Will 224 get a new area code?
NANPA forecasts exhaust in 3Q 2033; no relief planning listed.