447 area code
Where the 447 area code is, its overlay and how to dial a +1 447 number from anywhere.
The 447 area code is in Illinois, United States (Central (CT)). To call from abroad: +1 447 555-0123. It is an overlay, so all 10 digits are dialled.
The 447 area code is a geographic North American Numbering Plan (NANP) code covering Illinois. It has been in service since 17-Aug-2006 and sits in the Central (CT) time zone.
How to dial a 447 number
+1 447 555-01231 447 555-0123447 555-0123Other Illinois area codes
Frequently asked questions
Where is the 447 area code?
The 447 area code is in Illinois, United States (Central (CT)).
Is 447 an overlay area code?
Yes. 447 overlays the same region as 217, so callers dial all 10 digits.
Do I have to dial 10 digits for 447?
Yes — dial the area code plus the seven-digit number.
How do I call a 447 number from another country?
Dial your exit code (or +), then 1, then 447, then the number: +1 447 555-0123.
Source: NANPA numbering plan. An area code covers a region, not a precise address — a 447 number does not pinpoint a street or ZIP code.
Number holders in area code 447
Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 232 prefixes are in use in 447, shared by 32 companies. The largest holders:
| Company | Prefixes | Share |
|---|---|---|
| Onvoy, LLC | 58 | 25% |
| New Cingular Wireless PCS, LLC | 38 | 16% |
| Fractel, LLC | 30 | 13% |
| Multiple Ocn Listing | 9 | 4% |
| Onvoy Spectrum, LLC | 8 | 3% |
| Ton80 Communications, LLC | 8 | 3% |
Source: NANPA central office code assignments. A number keeps its original prefix when it is ported to another carrier.
Complaints about 447 numbers
- Reports to the FTC, last 30 days
- 110
- Recorded messages or robocalls
- 76%
- Rank among area codes
- #371 of 670
- Most reported subjects
- Other (41)
- Reducing your debt (credit cards, mortgage, student loans) (40)
- Calls pretending to be government, businesses, or family and friends (11)
Period Aug 26 – Sep 24, 2026. These are the numbers shown on the caller ID of the reported calls; many are spoofed and do not belong to the real caller.
Source: US Federal Trade Commission, Do Not Call reported calls data (daily files).
All US area codes United States +1 Map of area code 447 — cities & rate centres