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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.

Area code 217: NANPA facts
ItemValue
StateIllinois
In service sinceJanuary 1, 1947
OverlayYes, with 447
Time zoneCentral
Local calls within the codeten digits (area code plus number)
Assigned central office codes786
Rate centers with codes265
Carriers holding codes52
Pooled codes552
Codes assigned since 202020
Relief planning in progressNo

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.

Most populous places with 217 exchanges
PlacePopulation (2024)Area codesExchangesCarriers
Springfield, IL112,949217, 44710932
Decatur, IL68,763217, 4474911
Homer, IL41,486217, 44722
Quincy, IL38,786217, 4473115
Danville, IL27,981217, 4474714
Charleston, IL19,369217, 447285
Jacksonville, IL17,801217, 4472514
Mattoon, IL16,602217, 4473917
Mahomet, IL14,883217, 44732
Chatham, IL14,639217, 44765
Lincoln, IL13,047217, 4471510
Effingham, IL12,434217, 447127
Rantoul, IL12,268217, 44775
Taylorville, IL11,301217, 4471510
Paris, IL8,962217, 44785

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.

Largest code holders in area code 217
Carrier (NANPA operating company)ExchangesShare
Illinois Bell Tel CO12916%
Frontier North, INC. - Il11415%
New Cingular Wireless PCS, LLC - Il729.2%
Level 3 Communications, LLC - Il597.5%
Cellco Partnership d/b/a Verizon Wireless - Il516.5%
Illinois Consolidated Tel. CO.455.7%
T-mobile USA, INC.405.1%
Frontier Communications of the Carolinas, INC - Il364.6%
Citizens Telecom CO Illinois-frontier Citizens -il263.3%
Mediacom Telephony of Illinois, LLC - Il243.1%
Onvoy, LLC202.5%
MCC Telephony LLC141.8%

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 centers in area code 217 by assigned codes
Rate center (NANPA)PlaceCodes
SPRINGFLDSpringfield, IL91
CHAMPAURBNnot matched81
DECATURDecatur, IL44
DANVILLEDanville, IL27
QUINCYQuincy, IL25
MATTOONMattoon, IL24
JACKSONVLJacksonville, IL21
LINCOLNLincoln, IL14
TAYLORVLTaylorville, IL14
CHARLESTONCharleston, IL12
EFFINGHAMEffingham, IL11
LITCHFIELDLitchfield, IL7
PARISParis, IL7
MARSHALLMarshall, IL7
RANTOULRantoul, IL6
ARCOLAArcola, IL5
CLINTONClinton, IL5
GIBSONCITYGibson City, IL5
CARTHAGECarthage, IL4
PITTSFIELDPittsfield, IL4
CHATHAMChatham, IL4
CARROLLTONCarrollton, IL4
BEASONnot matched4
ROCHESTERRochester, IL4
BUFFALOBuffalo, IL3

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.

Area code 217: central office codes by decade assigned
Decade assignedExchangesShare
2000s13162%
2010s5928%
2020s209.5%

Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.

Using area code 217 for business calls

For $99 a month, Callata puts a team of up to 5 on one plan ($20 for each person after that): up to 3 local numbers, unlimited inbound calls, a pooled allowance of 1,500 outbound US and Canada minutes per user, browser and cell calling, voicemail transcription with urgency triage, recorded calls with AI summaries and business-hours routing, with E911 on every number.

If you already have a number in area code 217, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.

Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.

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.