Illinois Reverse Phone Lookup

Identify Phone Number Location Using Illinois Area Codes

To identify the location of an Illinois phone number, you need to understand the North American Numbering Plan (NANP) structure that all Illinois numbers follow: +1 NPA NXX XXXX.

• +1 - Country code indicating the United States
• NPA - The area code reveals the geographic region where the number was originally assigned
• NXX - Central office code that locates the specific neighborhood and identifies the service provider
• XXXX - Subscriber number identifies the individual phone line within that local exchange

The area code (NPA) is your key to determining location. By matching the three-digit area code to Illinois's regional assignments, you can identify which part of the state the phone number originates from. Each area code corresponds to specific cities and counties throughout Illinois, making it possible to narrow down the caller's general location.

Here's a complete list of Illinois area codes with major cities:

For latest Illinois phone numbering regulations, contact George Light at the Illinois CC via [email protected] or 312-814-8591.

Illinois Phone Numbers

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):

Source: FCC Voice Telephone Services Report

Top 5 US Cell Phone Companies

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:

• Verizon - 146 million customers
• T-Mobile US - 131 million customers
• AT&T Mobility - 118 million customers
• Boost Mobile - 7 million customers
• U.S. Cellular - 4.4 million customers

Robocalls and Unwanted Calls in Illinois

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:

• 56,038 of Illinois' 102,690 complaints involved automated robocalls, representing more than half of all unwanted call reports statewide.
• 7,908 complaints were for fraudulent "medical & prescriptions" schemes, followed by imposter scams (7,507) and debt reduction (7,050), showing these remain top threats to Illinois families.
• Over 10.8 million Illinoisans have registered their numbers on the Do Not Call Registry, demonstrating strong community engagement in call protection efforts.
• Active Registrations have risen to 10,870,557 demonstrating continued public participation.
• 33,277 complaints involved live callers, indicating that human-operated scam operations continue actively targeting the state.
• Illinois ranks #4 nationally for complaints per 100,000 population, reflecting a high level of complaints per capita compared to other states.

Verify Phone Number Owner to avoid Scam Calls Illinois Fraud Statistics

According to the Federal Trade Commission's 2024 data, phone calls and text messages make up 35% of all fraud contact methods nationwide:

• Phone calls: 19% of fraud reports (284,659 reports, $948M in losses)
• Text messages: 16% of fraud reports (246,784 reports, $470M in losses)

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

Other Illinois Phone Number Search Methods

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 Phone Number Searches

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.

• Facebook: You can try searching the Facebook public directory. Simply enter the phone number in the search bar to see if it's associated with a public profile.
• LinkedIn: If you suspect the phone number belongs to a business professional, use the LinkedIn people directory. Given Illinois' large number of businesses, this can be a helpful resource to verify professional contact information.

Illinois Business Phone Verification

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.

• Illinois Secretary of State: The Illinois Secretary of State website provides various resources for business verification.
• Illinois Corporation & LLC Search: Use the Illinois Corporation & LLC Search to find business information, including registered phone numbers. Enter a company name or partial name to search for its registration details and associated contact information.

For the best results, it helps to use these methods together.