Identify who called from an unknown Illinois landline or cell phone number using our free reverse phone lookup service. Search a phone number to find the caller's name, address, carrier, and other details. Identify the unknown callers, verify Illinois businesses, or research potential scam calls.
Federal Data
State Data
County Data
City Data
Reverse phone lookup in Illinois lets you find the owner of any phone number using public records and government databases. Get the registered name and address in seconds. Perfect for Chicago residents and rural callers dealing with spam or unknown numbers. This number lookup helps Illinois residents screen calls and decide whether to answer, ignore, or block calls from unfamiliar numbers.
All Illinois phone numbers consist of three parts: the three-digit Area Code, the three-digit Prefix Code (also known as the exchange or central office code), and the final four-digit line number. While the area code narrows down the location to a large region, the prefix code can often specify the original city or town where the number was registered.
Here's a complete list of Illinois area codes:
Location: The 217 and 447 area codes cover central and southeastern Illinois, including major cities like Springfield, Champaign, and Decatur.
Common Callers: Illinois State government agencies, UI Urbana-Champaign admissions, and ADM commodity brokers.
Scams and Spam Calls: The 217 and 447 area codes experience a high volume of "Final Notice" Vehicle Warranty calls and Fake Legal Action threats. Scammers in this region frequently use "Can You Hear Me?" voice phishing techniques, alongside Phishing Texts masquerading as delivery confirmations or orders.
Location: The 224 and 847 area codes cover the northern suburbs of Chicago in Illinois, including major cities like Evanston, Schaumburg, and Waukegan.
Common Callers: Allstate insurance agents, Walgreens corporate support, AbbVie pharma sales, and Naval Station Great Lakes admin.
Scams and Spam Calls: The 224 and 847 area codes are subject to Aggressive Debt Collection scams and Social Security Number suspension threats. 847 specifically reports Chase Bank debt collection impersonators, while 224 is dealing with frequent Fake Warrant threats and Student Loan Forgiveness schemes.
Location: The 309 and 861 area codes cover west-central Illinois, including major cities like Peoria, Moline, and Bloomington.
Common Callers: State Farm insurance claims adjusters, Caterpillar logistics, and John Deere equipment support.
Scams and Spam Calls: The 309 and 861 area codes are targeted by the specific "Megan's Student Loan Forgiveness" scam and Illinois DOT Driver's License text phishing. Residents also report PSE&G Rate Reduction scams (in 861) and Fake Car Accident/Debt Collection calls throughout the region.
Location: The 312 and 872 area codes cover the central business district of Chicago (the Loop) in Illinois.
Common Callers: Chicago City Hall clerks, commodity traders (CME Group), and corporate lawyers.
Scams and Spam Calls: The 312 and 872 area codes face threats from IRS Arrest Warrant scams and aggressive Law Enforcement Impersonation. 312 is dealing with specific Grubhub Delivery Fraud and Subscription Auto-Renewal scams, while 872 reports Bank Phishing text scams regarding locked cards and fraudulent Police Charity offers.
Location: The 331 and 630 area codes cover the western suburbs of Chicago in Illinois, including major cities like Aurora, Naperville, and Elgin.
Common Callers: The Joint Commission surveyors, Fermilab researchers, and Edward-Elmhurst Health schedulers.
Scams and Spam Calls: The 331 and 630 area codes are targeted by Fake Legal Complaints and HR Threats. Scammers frequently use "Can You Hear Me?" voice signature scams, Anonymous Medical/Health Surveys, and impersonate major utilities or brands like Amazon to solicit payments or personal data.
Location: The 464 and 708 area codes cover the southern and western suburbs of Chicago in Illinois, including major cities like Cicero, Oak Lawn, and Tinley Park.
Common Callers: Advocate Christ Medical Center nurses, Loyola Medicine billing, and regional manufacturing sales.
Scams and Spam Calls: The 464 and 708 area codes experience frequent Fake Debt Collector and Process Server threats. Residents report Aggressive Utility Bill scams, Social Security & IRS impersonation, and specific "Can You Hear Me?" voice signature attempts.
Location: The 618 and 730 area codes cover southern Illinois, including major cities like East St. Louis, Carbondale, and Belleville.
Common Callers: Scott Air Force Base (transportation command), SIU Carbondale alumni, and energy sector dispatchers.
Scams and Spam Calls: The 618 and 730 area codes are targeted by aggressive Medicare and "Health IQ" sales scams. Common issues include Fake Amazon & Apple purchase confirmations, abusive 401k & Retirement Plan telemarketing, and Fake Lawsuit/Document Service threats.
Location: The 773 and 872 area codes cover the city of Chicago, excluding the central business district.
Common Callers: United Airlines operations (O'Hare), University of Chicago Health scheduling, and Chicago Cubs ticketing.
Scams and Spam Calls: Residents in the 773 and 872 area codes are bombarded by Fake Government Arrest Warrants (IRS/SSA) and Bogus Lawsuit threats. Specific local scams include Fifth Third Bank impersonation, Microsoft Windows Tech Support fraud, and Fake Loan/Cash Advance offers.
Location: The 779 and 815 area codes cover northern Illinois, outside the immediate Chicago metropolitan area, including major cities like Rockford, Joliet, and Peoria.
Common Callers: Amazon fulfillment center recruiters, ComEd/Exelon nuclear plant admin, and NIU admissions.
Scams and Spam Calls: The 779 and 815 area codes see frequent CEO & Coworker Impersonation scams and Illinois Secretary of State phishing texts. Residents also report Mortgage Foreclosure scams (specifically the "Alex Parker" script), Fake Loan offers, and aggressive Brand Impersonation involving Amazon and Microsoft.
Location: The 312, 773, and 872 area codes cover the city of Chicago in Illinois, including the central business district and all surrounding city neighborhoods.
Common Callers: Cook County Government, Rush University Medical Center, DePaul University, Boeing (regional offices), and Chicago Transit Authority (CTA).
Scams and Spam Calls: Across the 312, 773, and 872 area codes, there is a heavy prevalence of Law Enforcement and IRS Impersonation scams threatening arrest. Residents frequently encounter Subscription Auto-Renewal traps, Fake Delivery/Grubhub fraud, and sophisticated Bank Phishing via text message.
For latest Illinois phone numbering regulations, contact George Light at the Illinois CC via [email protected] or 312-814-8591.
Illinois has approximately 18.3 million active phone numbers. Cell phones are the dominant type with 15.1 million users, while landlines have declined to 552,000 connections statewide. Internet phone services account for about 2.6 million numbers.
The vast majority of phone numbers in Illinois are mobile phones. This means tracing phone numbers can be more complex compared to traditional landlines due to decreased availability of public information.
Illinois Voice Subscriptions (in thousands):
| Service Type | June 2023 | Dec 2023 | June 2024 |
|---|---|---|---|
| Mobile telephony | 14,822 | 15,057 | 15,106 |
| Local exchange telephone service | 729 | 671 | 552 |
| VoIP subscriptions | 2,715 | 2,625 | 2,593 |
| Total | 18,266 | 18,353 | 18,251 |
Source: FCC Voice Telephone Services Report
Most phone numbers are cell phones, and most cell phone numbers come from the top three United States wireless companies. Here are the top five US Cell Phone Companies in Q1 2025:
Illinois residents experienced a slight increase in unwanted calls in 2024, with complaints reaching 102,690. This is up from 96,379 in 2023 but still below the peak of 216,686 in 2021, according to the latest National Do Not Call Registry Data Book.
Key Facts for Illinois Residents:
According to the Federal Trade Commission's 2024 data, phone calls and text messages make up 35% of all fraud contact methods nationwide:
More than 1 in 3 fraud attempts happen through phone communication. Phone call fraud costs victims a median of $1,500 per case. Text message fraud costs a median of $1,000 per victim.
In 2024, Illinois residents reported 71,060 fraud cases resulting in total losses of $318,113,996, with a median loss of $$400 per victim. With phone-based fraud representing such a significant portion of these cases, phone owner verification has become a critical consumer protection tool.
When you receive calls from unknown numbers, take a moment to research the caller's identity. Reverse phone lookup services allow you to search a phone number to find information about who's calling—including whether the number has been reported for fraudulent activity.
Received fraudulent calls or fallen victim to phone fraud? Report it immediately. Each report helps authorities identify fraud patterns and protect other consumers from similar scams.
Additional Contact:
Illinois Attorney General
Kwame Raoul
(312) 814-3000
When a simple reverse phone lookup doesn't give you enough information, trying other search methods can help you identify an Illinois phone number. With a population of 12,710,158 and 322,349 business establishments, finding the owner of an Illinois phone number sometimes requires more than one approach.
Social media can be a useful tool to find more information. For example, if you're meeting someone new and want to verify their phone number's legitimacy, or for dating safety to confirm a potential partner's identity before meeting, you can use these platforms to search.
If you suspect a phone number belongs to a business in Illinois, official state databases can help you verify its legitimacy. For example, if you're considering business partnerships with Illinois companies or vendor verification before large purchases or contracts, verifying through the state can be beneficial.
For the best results, it helps to use these methods together.
ThisNumber U.S. phone directory contains name and address records for over 23 million phone numbers. Our free reverse phone lookup results may include available information on:
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delaware
District Of Columbia
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Puerto Rico
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming