Area code 447: Illinois
Area code 447 is a US state area code for Illinois, on Central Time. It has 213 prefixes in service across 118 rate centers, the largest being Springfield, Danville and Champaign-Urbana. It shares its area with 217, so local numbers there can start with any of them. Local calls there take 10 digits.
Local time in area code 447
America/Chicago
Prefixes in service
213 of 792 possible
118 rate centers
Area code 447 facts
| Location | Illinois, United States |
|---|---|
| Time zone | Central Time |
| Overlays | 217 |
| Overlay of | 217 |
| In service since | March 27, 2021 |
| Local calls | 10 digits; toll calls 1 + 10 digits |
| Carrier | Not shown. An area code is where a number was issued; numbers port between carriers. Check line type |
Which cities and towns use area code 447?
NANPA records each prefix against a rate center, the local billing area a number belongs to, usually named after its main town. These are the 447 rate centers with the most prefixes in service. 106 smaller ones aren't listed.
| Rate center | Prefixes |
|---|---|
| Springfield | 18 |
| Danville | 18 |
| Champaign-Urbana | 15 |
| Charleston | 15 |
| Mattoon | 14 |
| Quincy | 6 |
| Decatur | 5 |
| Jacksonville | 4 |
| La Harpe | 2 |
| West Dana | 2 |
| Chatham | 2 |
| Marshall | 2 |
Source: NANPA central office code assignments, file dated 10/17/2026. Each prefix holds up to 10,000 numbers.
How do I dial a 447 number?
NANPA's dialling plan for 447: local calls inside the code take 10 digits, toll calls 1 + 10 digits. From another area code, dial 1 first. From abroad, use +1. The examples use 555-0147, from a range reserved for fictional numbers.
| Local call inside 447 | 447-555-0147 |
|---|---|
| From another US or Canadian area code | 1-447-555-0147 |
| From outside North America | +1 447 555 0147 |
| E.164, for CRMs and SMS tools | +14475550147 |
When did area code 447 start?
Area code 447 went into service on March 27, 2021 as an overlay of 217. Today 447 and 217 cover the same area as an overlay, which is why 10-digit dialling is needed for local calls there.
Tools for 447 numbers
- Area code lookup
Look up any code or a whole list of numbers, or find the codes for a state or city.
- Area code time zone
Local time for a list of numbers, with a callable-now flag.
- NPA-NXX lookup
Rate center and state for one prefix, a level below the area code.
- TCPA calling hours checker
Whether it's inside the federal 8 a.m. to 9 p.m. calling window there now.
Next step
A 447 number tells you where it was issued, not what it is now.
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Area code 447 questions
- What state is area code 447?
- Area code 447 is in Illinois, United States. Its largest rate centers by number of prefixes are Springfield, Danville, Champaign-Urbana, Charleston and Mattoon.
- What time zone is area code 447 in?
- Central Time.
- What area codes overlay 447?
- 217. An overlay adds a new code to the same area instead of splitting it, so neighbours can have different area codes and local calls need 10 digits.
- When did area code 447 start?
- Area code 447 went into service on March 27, 2021 as an overlay of 217.
- Is a 447 number a cell phone or a landline?
- The area code can't tell you. In the US and Canada mobiles, landlines and VoIP lines share area codes and prefixes, and numbers move between carriers and line types. Only a live line-type lookup answers it for one number.
- How many phone numbers does area code 447 have?
- 213 of its 792 possible prefixes are in service, and each prefix holds up to 10,000 numbers. That counts prefixes assigned to carriers, not numbers in use.
Other area codes in Illinois
Sources
Location, overlays, in-service date and dialling plan: NANPA NPA database, file dated 10/16/2026. Prefixes and rate centers: NANPA central office code assignments, 10/17/2026. Time zones mapped to the IANA time zone database. By the SimpleVerifier Team; how we build these pages.