Area Code 217
Illinois
Area code 217 serves Illinois, primarily Springfield, in the Central Time (CT) time zone. It has served the region since 01-Jan-1947.
Overlay Area Code
This area code is part of an overlay region, meaning the same geographic area is served by multiple area codes. Overlay codes were introduced to meet growing demand for phone numbers without requiring existing customers to change their numbers.
This area code shares its geographic region with: area code 447 (Springfield).
In service since: 01-Jan-1947
Historical Timeline of Area Code 217
Area code 217 was established in 1947 as one of the original 86 North American area codes assigned by Bell Laboratories. It has undergone only two boundary changes in its history, making it one of the most geographically stable area codes in the United States. After 64 years without boundary modifications, the 447 overlay was activated in 2021 to serve the same 35-county central Illinois region. Source: Wikipedia
Key milestones:
- 1947: Created as one of the original 86 area codes by Bell Laboratories (ICC Press Release)
- 1951: Metro East boundary shift, southern portion reassigned to area code 618 (Wikipedia)
- 1957: Northern portion (Peoria, Bloomington-Normal) split off as area code 309 (ICC Staff Testimony)
- 2001: NeuStar petitions ICC for all-services overlay relief under Docket 01-0656 (ICC Staff Testimony)
- 2006: ICC Interim Order approves overlay; NANPA assigns 447 (ICC Interim Order)
- 2007: Implementation plan approved with trigger at 50 available CO codes (ICC Final Order)
- 2019: NANPA PL-532 issued; 447 overlay formally announced after 12-year conservation delay (ICC Press Release)
- 2021: 447 overlay activated; mandatory 10-digit dialing begins Feb 27; new codes available Mar 27 (Wikipedia)
Area code 217's geographic stability is unusual among original 1947 codes. Most were split or overlaid multiple times, but 217 retained its boundaries for 64 years after the 1957 split, only receiving an overlay in 2021. The 447 overlay was approved in 2006 but delayed by conservation efforts until 2019.
Unique Facts About Area Code 217
Area code 217 spans 265 rate centers across 35 counties in central Illinois, from the Indiana border to the Mississippi River. Its 447 overlay was approved by the ICC in 2006 but delayed 18 years by industry conservation efforts. Source: ICC Press Release
- 18-year implementation delay: The 447 overlay was petitioned in 2001 and approved in 2006, but not activated until 2021 due to conservation efforts. The ICC Press Release credits conservation for delaying implementation by 12 years (ICC Press Release)
- 64 years of boundary stability: Area code 217 has not undergone a boundary change since 1957, when the northern portion became area code 309. This makes it one of the most geographically stable original 1947 codes (ICC Staff Testimony)
- 265 rate centers across 35 counties: The overlay covers a larger geographic spread than most midwest area codes, stretching from the Indiana border to the Mississippi River (NANPA PL-532)
- State-level regulatory authority: The Illinois Commerce Commission manages numbering plan administration for 217 under FCC delegated authority, making it one of few states where a state utility commission handles NPA relief (ICC Area Codes Program)
- Three-party consensus: AT&T, Verizon, and ICC Staff unanimously agreed on the all-services overlay as the preferred relief method in Docket 01-0656 (ICC ALJ Memorandum)
The 447 overlay's 18-year journey from petition to activation reflects the tension between numbering conservation and relief planning. The implementation plan's trigger at 50 available CO codes proved conservative, and industry cooperation extended the timeline well beyond initial projections.
FCC Regulatory History
Area code 217's overlay was managed through ICC Docket 01-0656, spanning from 2001 to 2021. The Illinois Commerce Commission operated under FCC delegated authority, with NeuStar (later Somos) serving as NANPA administrator. The implementation plan included a trigger at 50 available CO codes and a 13-month implementation window. Source: ICC Final Order
| Year | Event | Docket | Regulatory Action & Impact |
|---|---|---|---|
| 2001 | Petition filed | Docket 01-0656 | NeuStar petitions ICC for all-services overlay (Alternative No. 4), initiating relief proceeding (ICC Staff Testimony) |
| 2004 | Public forums | Docket 01-0656 | Public forums held in Champaign, Danville, Mattoon, Decatur, Jacksonville to gather input (ICC Final Order) |
| 2006 | Interim Order approved | Docket 01-0656 | ICC adopts all-services distributed overlay; NANPA assigns 447 NPA; industry directed to delay via conservation (ICC Interim Order) |
| 2007 | Implementation plan | Docket 01-0656 | Final Order and implementation plan approved; trigger at 50 available CO codes; 13-month implementation window (ICC Final Order) |
| 2019 | Overlay announced | PL-532 | NANPA Planning Letter issued; 265 rate centers across 35 counties; conservation efforts delayed implementation 12 years (ICC Press Release) |
| 2021 | Overlay activated | N/A | Mandatory 10-digit dialing Feb 27; 447 NPA activated Mar 27 for new CO code assignments (Wikipedia) |
Demographics & Economics
- Total Population
- 1,515,698
- Population Density
- 54 people/sq mibelow U.S. average (U.S.: 94 people/sq mi)
- Median Household Income
- $64,907below U.S. median (U.S.: $78,538)
- Poverty Rate
- 13.5%near U.S. average (U.S.: 12.4%)
- Unemployment Rate
- 4.8%near U.S. average (U.S.: 5.2%)
- Education Attainment
- Bachelor's Degree+27.2%below U.S. average (U.S.: 35.0%)High School or Lower36.7%
Statistics are population-weighted aggregations from Census ACS 5-year estimates.See Sources for details.
Geographic Coverage
State
IL
Major Cities
- Springfield
- Champaign
- Decatur
- Quincy
- Urbana
- Danville
- Jacksonville
- Charleston
- Mattoon
- Chatham
- Lincoln
- Rantoul
- Effingham
- Taylorville
- Mahomet
- Savoy
- Paris
- Clinton
- Litchfield
- Monticello
- Mount Zion
- Beardstown
- Hillsboro
- Carlinville
and 327 more cities
Time Zone
- Central Time (CT)
Current Time
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 217).
| County | Population | Share |
|---|---|---|
| Champaign, IL | 220,981 | 14.6% |
| Sangamon, IL | 206,927 | 13.7% |
| Macon, IL | 115,859 | 7.6% |
| Vermilion, IL | 77,078 | 5.1% |
| Coles, IL | 74,650 | 4.9% |
| Adams, IL | 71,840 | 4.7% |
| Montgomery, IL | 53,974 | 3.6% |
| Shelby, IL | 53,953 | 3.6% |
| Christian, IL | 52,027 | 3.4% |
| Morgan, IL | 44,571 | 2.9% |
| Moultrie, IL | 42,792 | 2.8% |
| Macoupin, IL | 42,403 | 2.8% |
| Cumberland, IL | 41,035 | 2.7% |
| Scott, IL | 34,587 | 2.3% |
| Piatt, IL | 33,856 | 2.2% |
| Logan, IL | 33,752 | 2.2% |
| Effingham, IL | 29,950 | 2.0% |
| Clark, IL | 28,807 | 1.9% |
| Edgar, IL | 28,639 | 1.9% |
| Douglas, IL | 25,353 | 1.7% |
| Pike, IL | 20,121 | 1.3% |
| Cass, IL | 19,840 | 1.3% |
| Hancock, IL | 19,780 | 1.3% |
| Menard, IL | 16,816 | 1.1% |
| Ford, IL | 16,233 | 1.1% |
| De Witt, IL | 15,461 | 1.0% |
| Jasper, IL | 13,107 | 0.9% |
| Schuyler, IL | 12,150 | 0.8% |
| Greene, IL | 11,927 | 0.8% |
| McLean, IL | 9,874 | 0.7% |
| Iroquois, IL | 9,449 | 0.6% |
| Brown, IL | 7,938 | 0.5% |
| Fayette, IL | 5,226 | 0.3% |
| Bond, IL | 4,312 | 0.3% |
| Mason, IL | 4,278 | 0.3% |
| Henderson, IL | 3,618 | 0.2% |
| Crawford, IL | 2,937 | 0.2% |
| Madison, IL | 2,635 | 0.2% |
| Clay, IL | 2,336 | 0.2% |
| McDonough, IL | 1,617 | 0.1% |
| Livingston, IL | 1,107 | 0.1% |
| Calhoun, IL | 947 | 0.1% |
| Tazewell, IL | 608 | 0.0% |
| Jersey, IL | 347 | 0.0% |
Call Context
This area code spans a mix of urban centers and rural communities across IL, with Springfield as a primary city.
Nearby Area Codes
Area codes geographically closest to 217.
Other Area Codes in Illinois
Area codes that also serve Illinois, linked for easy comparison.
Frequently Asked Questions
Common questions about area code 217 and how phone numbering works.
One of the original 86 area codes established in 1947 by AT&T/Bell System. Cited in ICC Press Release, Wikipedia, and NANPA documents.
Overlay petition filed in 2001, ICC approved in 2006, but 447 not activated until 2021 — 12+ years of conservation-driven delay (18 years from initial petition).
Phone numbers assigned to area code 217 are tied to where they were originally provisioned — not the caller's current location. This code serving roughly 1516k people covers Springfield in IL, so a number originally set up there will retain the 217 prefix even if the owner moves or uses VoIP. Mobile phones keep their original number when users relocate, and businesses often adopt local area codes to establish a regional presence.
Start by looking up the area code on this site to understand its geographic context — area code 217 is associated with Springfield in IL. For caller-specific details, use your carrier's caller ID features or check public directories. If you suspect fraud, you can report it to the FTC. To file a complaint about robocalls or spoofed numbers, visit the FCC Consumer Complaint Center. You can also register with the National Do Not Call Registry.
When an area's available number pool runs low, regulators introduce an "overlay" code covering the same territory. Both codes coexist, and new numbers are assigned from whichever has availability. Area code 217 serves the Springfield region in IL, where growing demand for phone numbers necessitated an additional code. This area code shares its region with area code 447. Learn more in our overlay vs split guide.