Area code
Area code 847 — Northbrook & Arlington Heights, IL
Illinois · in service since January 20, 1996
Area code 847 covers Northbrook & Arlington Heights, IL. It is an overlay: 224 serves the same area, so neighbors can have different area codes.
Overlay, same area: 224
Local time in Northbrook & Arlington Heights
Spam reports from Sep 23 – Oct 22, 2026
Average #203 of 461 codes
456 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zoneCentral Time
- Local calls1 + 10 digits
- Prefixes799 assigned
- Runs out~3Q 2033
- Unwanted call?Block & report
Spam call reports about 847 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 24 |
| Sep 14 | 145 |
| Sep 21 | 161 |
| Sep 28 | 117 |
| Oct 5 | 68 |
| Oct 12 | 90 |
| Oct 19 (4 days) | 95 |
Compared with all codes
- Robocalls
- 59%all codes 75%
- Callers with the same code
- 72%all codes 35%
- Rank by complaints
- #203of 461 · middle half
- FCC complaints, Oct 2025 – Sep 2026
- 574 about text messages
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Dropped call or no message | 101 14% | |
| Calls pretending to be government, businesses, or family and friends | 92 13% | |
| Medical & prescriptions | 49 7% | |
| Reducing your debt (credit cards, mortgage, student loans) | 35 5% | |
| Home improvement & cleaning | 12 2% | |
| Warranties & protection plans | 7 1% |
Where the people who complained live
Sep 11 – Oct 22, 2026
| State | Complaints | |
|---|---|---|
| Illinois | 590 84% | |
| Michigan | 9 1% | |
| Texas | 9 1% | |
| Tennessee | 8 1% | |
| Florida | 7 1% |
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 847 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| NORTHBROOK | Northbrook | Cook County | 122 |
| ROSELLE | Roselle | spans 2 counties | 87 |
| ARLIGTNHTS | Arlington Heights | Cook County | 38 |
| ELK GROVE | — | — | 37 |
| WAUKEGAN | Waukegan | Lake County | 33 |
| DESPLAINES | Des Plaines | Cook County | 32 |
| SKOKIE | Skokie | Cook County | 31 |
| WHEELING | Wheeling | spans 2 counties | 31 |
| PALATINE | Palatine | Cook County | 24 |
| ELGIN | Elgin | spans 2 counties | 23 |
Plus 36 smaller exchange areas.
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
Is 847 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 847 prefixes
The five largest of 22 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| Illinois Bell Tel Co. | 361 45% | |
| New Cingular Wireless PCS, LLC | 80 10% | |
| Mcimetro Access Transmission Services LLC | 67 8% | |
| Teleport Communications America, LLC | 57 7% | |
| T-Mobile USA, Inc. | 54 7% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 847
What area code is 847?
An Illinois area code, in service since January 20, 1996.
Where is 847 area code, and what time zone is it in?
Northbrook & Arlington Heights, IL; Central Time.
Why am I getting spam calls from 847?
456 FTC complaints from Sep 23 – Oct 22, 2026, most often about dropped calls or no message (not verified by the FTC; caller ID can be spoofed).
Will 847 get a new area code?
NANPA forecasts exhaust in 3Q 2033; no relief planning listed.