Area code 217
Where 217 is, how it is dialed, which carriers hold its numbers and how many of its codes are in use, from NANPA's 10/01/2026 files.
- State
- IL
- In service
- 1947
- Assigned codes
- 786of 800 possible
- Carriers
- 52
Where area code 217 is
NANPA lists 217 as an in-service geographic area code for Illinois, first put into service on January 1, 1947. It is an overlay: 217 and 447 cover the same territory, so neighbors on the same street can have different area codes. It is in the Central time zone. The places with the most assigned exchanges include Springfield, Decatur, Danville, Quincy, and Mattoon. By population, its largest named places are Milton, Springfield, Decatur, Homer, and Quincy.
| Item | Value |
|---|---|
| State | Illinois |
| In service since | January 1, 1947 |
| Overlay | Yes, with 447 |
| Time zone | Central |
| Local calls within the code | ten digits (area code plus number) |
| Assigned central office codes | 786 |
| Rate centers with codes | 265 |
| Carriers holding codes | 52 |
| Pooled codes | 552 |
| Codes assigned since 2020 | 20 |
| Relief planning in progress | No |
Source: NANPA NPA report and utilized central office code file, both dated 10/01/2026.
Places served by 217
217 holds 8.8% of the 8,977 central office codes assigned in Illinois, the most of any code in the state. 233 Census places could be matched to rate centers with 217 exchanges; the most populous are Milton (120,000), Springfield (113,000), Decatur (68,763), and Homer (41,486). For a storefront or service area inside 217, the place pages show which prefixes are rated local there.
| Place | Population (2024) | Area codes | Exchanges | Carriers |
|---|---|---|---|---|
| Springfield, IL | 112,949 | 217, 447 | 109 | 32 |
| Decatur, IL | 68,763 | 217, 447 | 49 | 11 |
| Homer, IL | 41,486 | 217, 447 | 2 | 2 |
| Quincy, IL | 38,786 | 217, 447 | 31 | 15 |
| Danville, IL | 27,981 | 217, 447 | 47 | 14 |
| Charleston, IL | 19,369 | 217, 447 | 28 | 5 |
| Jacksonville, IL | 17,801 | 217, 447 | 25 | 14 |
| Mattoon, IL | 16,602 | 217, 447 | 39 | 17 |
| Mahomet, IL | 14,883 | 217, 447 | 3 | 2 |
| Chatham, IL | 14,639 | 217, 447 | 6 | 5 |
| Lincoln, IL | 13,047 | 217, 447 | 15 | 10 |
| Effingham, IL | 12,434 | 217, 447 | 12 | 7 |
| Rantoul, IL | 12,268 | 217, 447 | 7 | 5 |
| Taylorville, IL | 11,301 | 217, 447 | 15 | 10 |
| Paris, IL | 8,962 | 217, 447 | 8 | 5 |
Population: Census Vintage 2024 estimates for the matched place. Exchanges and carriers: NANPA utilized code file.
How calls are dialed in 217
According to NANPA's dialing-plan data, local calls within 217 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits. Ten-digit local dialing means the area code is part of how customers save and recognize your number, so print it in full everywhere. NANPA's dialing-plan note for this code reads: "1+10 digit permissible at each service providers discretion"
Phone companies in area code 217
52 carriers hold the 786 central office codes assigned in 217. Illinois Bell Tel CO has the most, with 129 (16%). 552 of the codes (70%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. Numbers can move between carriers through porting, so a code's holder tells you where the block started, not where every number lives now.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Illinois Bell Tel CO | 129 | 16% |
| Frontier North, INC. - Il | 114 | 15% |
| New Cingular Wireless PCS, LLC - Il | 72 | 9.2% |
| Level 3 Communications, LLC - Il | 59 | 7.5% |
| Cellco Partnership d/b/a Verizon Wireless - Il | 51 | 6.5% |
| Illinois Consolidated Tel. CO. | 45 | 5.7% |
| T-mobile USA, INC. | 40 | 5.1% |
| Frontier Communications of the Carolinas, INC - Il | 36 | 4.6% |
| Citizens Telecom CO Illinois-frontier Citizens -il | 26 | 3.3% |
| Mediacom Telephony of Illinois, LLC - Il | 24 | 3.1% |
| Onvoy, LLC | 20 | 2.5% |
| MCC Telephony LLC | 14 | 1.8% |
Carrier names are the operating company (OCN) names on NANPA's utilized central office code file dated 10/01/2026. A carrier holding a code may port numbers to other carriers.
Rate centers and towns in 217
NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 217 has codes in 265 rate centers. The table lists the rate centers with the most codes, with the matching Census place where the abbreviation could be matched.
| Rate center (NANPA) | Place | Codes |
|---|---|---|
| SPRINGFLD | Springfield, IL | 91 |
| CHAMPAURBN | not matched | 81 |
| DECATUR | Decatur, IL | 44 |
| DANVILLE | Danville, IL | 27 |
| QUINCY | Quincy, IL | 25 |
| MATTOON | Mattoon, IL | 24 |
| JACKSONVL | Jacksonville, IL | 21 |
| LINCOLN | Lincoln, IL | 14 |
| TAYLORVL | Taylorville, IL | 14 |
| CHARLESTON | Charleston, IL | 12 |
| EFFINGHAM | Effingham, IL | 11 |
| LITCHFIELD | Litchfield, IL | 7 |
| PARIS | Paris, IL | 7 |
| MARSHALL | Marshall, IL | 7 |
| RANTOUL | Rantoul, IL | 6 |
| ARCOLA | Arcola, IL | 5 |
| CLINTON | Clinton, IL | 5 |
| GIBSONCITY | Gibson City, IL | 5 |
| CARTHAGE | Carthage, IL | 4 |
| PITTSFIELD | Pittsfield, IL | 4 |
| CHATHAM | Chatham, IL | 4 |
| CARROLLTON | Carrollton, IL | 4 |
| BEASON | not matched | 4 |
| ROCHESTER | Rochester, IL | 4 |
| BUFFALO | Buffalo, IL | 3 |
Top 25 of 265 rate centers.
Number supply in 217
An area code has 800 possible central office codes that start with 2 through 9, a few of which are reserved (such as N11 service codes and 555). 786 are assigned in 217, 98% of 800. 20 were assigned in 2020 or later.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 131 | 62% |
| 2010s | 59 | 28% |
| 2020s | 20 | 9.5% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
Using area code 217 for business calls
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Frequently asked questions
Where is area code 217?
217 is a geographic area code in Illinois. Places with the most assigned exchanges include Springfield, Decatur, Danville, and Quincy.
What time zone is area code 217 in?
NANPA lists 217 in the Central time zone.
When did area code 217 go into service?
NANPA records an in-service date of January 1, 1947.
Is 217 an overlay area code?
Yes. It shares its territory with 447.
Can my business get a 217 phone number?
Callata includes up to 3 local numbers on its $99/month plan (5 users included). Which 217 numbers are open depends on carrier inventory when you choose, and you can port an existing number for free.