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Area Code 224 Illinois: Location, Cities & Coverage Map (2025)

Discover where area code 224 is located in Illinois. Get complete coverage maps, 130+ cities served, dialing rules, and how to get a 224 number for your business.

Area codes7 min read

Introduction

Area code 224 is a telephone area code serving northeastern Illinois as an overlay to area code 847. Implemented on January 5, 2002, the 224 area code location covers Lake, Cook, Kane, and McHenry counties (with limited coverage in DuPage County), including major cities like Elgin, Waukegan, Arlington Heights, Schaumburg, and Evanston in the Chicago metropolitan area. The area code serves a combined population of approximately 7.75 million residents across over 130 cities and towns.

Whether you're looking up a 224 phone number, need to establish local business presence in northern Illinois, or want to understand coverage details, this guide covers everything about where area code 224 is located, what cities it serves, and how to get a 224 number.

What Cities Are in Area Code 224? Geographic Coverage Map

Area code 224 serves northeastern Illinois, covering major business centers and residential communities across four counties in the Chicago suburbs:

Coverage by County

  • Lake County: Complete coverage
  • Cook County: Northern portions
  • Kane County: Northern areas
  • McHenry County: Southeastern sections
  • DuPage County: Limited coverage (primarily served by area code 630)

Major Cities and Business Centers

CityCountyPopulation HubBusiness District
Waukegan, ILLake89,000+Lake County seat, industrial center
Elgin, ILKane115,000+Healthcare, manufacturing hub
Arlington Heights, ILCook78,000+Corporate headquarters, retail
Evanston, ILCook78,000+Northwestern University, biotech
Schaumburg, ILCook78,000+Major business district, conventions
Des Plaines, ILCook58,000+Aviation, logistics center
Mount Prospect, ILCook56,000+Mixed commercial district
Hoffman Estates, ILCook52,000+Corporate offices, retail
Glenview, ILCook48,000+Professional services hub
Palatine, ILCook69,000+Technology, finance center

Complete City Coverage List

Cook County Cities: Arlington Heights, Buffalo Grove, Des Plaines, Elk Grove Village, Evanston, Glenview, Hoffman Estates, Morton Grove, Mount Prospect, Niles, Northbrook, Palatine, Park Ridge, Rolling Meadows, Schaumburg, Skokie, Wheeling, Wilmette

Lake County Cities: Antioch, Barrington, Deerfield, Gurnee, Highland Park, Lake Forest, Lake Zurich, Libertyville, Mundelein, North Chicago, Vernon Hills, Waukegan, Zion

Kane County Cities: Algonquin, Carpentersville, East Dundee, Elgin, Gilberts, Hampshire, Huntley, Sleepy Hollow, South Elgin, West Dundee

McHenry County Cities: Cary, Crystal Lake (partial), Fox Lake, Lake in the Hills, Lakewood

Area Demographics

The 224/847 overlay region serves approximately 7.75 million residents with:

  • Median household income: $99,259
  • Median age: 39.5 years
  • Bachelor's degree or higher: 50.8% of residents
  • Homeownership rate: 70.2%

What Phone Services Support Area Code 224?

Primary Carriers (2025)

Area code 224 benefits from comprehensive coverage by major telecommunications providers:

  • Verizon: Extensive wireless and fiber network coverage
  • AT&T: Full-service landline, wireless, and business solutions
  • T-Mobile: Nationwide 5G coverage (merged with Sprint in 2020)
  • Comcast: Cable, internet, and business phone services

Available Service Types

Business Phone Solutions:

  • Traditional landline services for established operations
  • VoIP (Voice over Internet Protocol) for cost-effective scalability
  • Cloud-based phone systems with advanced features
  • SIP trunking for enterprise communications
  • Unified communications platforms

Residential Services:

  • Landline phone service through multiple providers
  • Wireless service from all major carriers
  • High-speed internet bundled packages
  • 5G wireless coverage across most coverage areas

Advanced Features Available:

  • Call forwarding and routing
  • Voicemail to email transcription
  • Auto-attendant and call queuing
  • International calling plans
  • Number portability between carriers

Area Code 224 Dialing Requirements and Rules

North American Numbering Plan Compliance

Area code 224 operates under NANPA oversight, ensuring:

  • Mandatory 10-Digit Dialing: All calls within the 224/847 overlay require area code + seven-digit number (effective January 5, 2002)
  • Number Pooling: Efficient allocation system prevents number exhaustion (area code 847 participated in the first U.S. number pooling trial in June 1998)
  • Local Number Portability: Customers can keep numbers when switching carriers
  • Emergency Services: Full E911 compatibility across all service types

Business Considerations

For Companies Choosing 224 Numbers:

  • Establishes local presence in northern Illinois market
  • Compatible with all modern business phone systems
  • Supports both inbound and outbound call center operations
  • Enables local marketing campaigns and customer trust

Area Code 224 History: When Was It Created?

Timeline of Area Code Changes

  • Jan 20, 1996: Area code 847 introduced from three-way split of 708
  • June 1998: Area code 847 selected for first U.S. telephone number pooling trial
  • Jan 5, 2002: Area code 224 implemented as overlay to address number exhaustion
  • April 1, 2020: Sprint merger with T-Mobile completed, consolidating major carrier coverage
  • 2025: Modern VoIP and 5G services expand communication options

Why the Overlay Was Necessary

The rapid growth of telecommunications services in Chicago's northern suburbs, including:

  • Proliferation of cell phones and pagers
  • Business expansion in technology corridors
  • Population growth in suburban communities
  • Increased demand for fax lines and internet dial-up (historical)

How to Get a 224 Area Code Phone Number for Business

Ideal Industries for 224 Numbers

  • Technology Companies: Strong coverage in Schaumburg, Arlington Heights tech corridors
  • Healthcare Organizations: Major hospital systems and medical practices throughout coverage area
  • Manufacturing: Industrial centers in Elgin, Waukegan, and surrounding areas
  • Professional Services: Law firms, consulting, financial services in suburban business districts
  • Retail and Hospitality: Shopping centers, restaurants, and service businesses

Steps to Get Your 224 Phone Number

  1. Choose Your Provider: Compare business features, pricing, and service quality
  2. Select Number Type: Local, toll-free, or vanity number options
  3. Configure Services: Set up call routing, voicemail, and advanced features
  4. Port Existing Numbers: Transfer current numbers to maintain continuity
  5. Test and Deploy: Ensure all systems work before going live

Frequently Asked Questions About Area Code 224

Q: Where is area code 224 located?

A: Area code 224 is located in northeastern Illinois, serving Lake, Cook, Kane, and McHenry counties in the Chicago metropolitan area.

Q: What cities are covered by area code 224?

A: Area code 224 covers over 130 cities including Waukegan, Elgin, Arlington Heights, Evanston, Schaumburg, Des Plaines, Highland Park, Lake Forest, Glenview, and Palatine across northern Illinois suburbs.

Q: What is the difference between area code 224 and 847?

A: Area codes 224 and 847 serve the same geographic area. 224 was added as an overlay in 2002 when 847 numbers were running out. Both codes work identically.

Q: When was area code 224 introduced?

A: Area code 224 was officially implemented on January 5, 2002, as an overlay to area code 847 to address telephone number exhaustion in northeastern Illinois.

Q: Can I keep my 224 number if I move outside the area?

A: Yes, number portability allows you to maintain your 224 number with most carriers, even when relocating outside Illinois.

Q: Do I need to dial the area code for local calls in the 224 area?

A: Yes, mandatory 10-digit dialing is required for all calls within the 224/847 overlay area (area code + seven-digit number).

Q: Which area code should I choose: 224 or 847?

A: Both serve the same geographic area. Choose based on number availability and any personal or business preferences.

Q: Are 224 numbers available for VoIP and cloud phone services?

A: Yes, most VoIP and cloud phone providers offer 224 area code numbers with full feature compatibility and advanced business features.

Q: Is area code 224 toll-free?

A: No, area code 224 is a standard geographic area code, not a toll-free number. Standard calling rates apply based on your phone plan.

Q: What time zone is area code 224?

A: Area code 224 is in the Central Time Zone (CT), UTC-6 during standard time and UTC-5 during daylight saving time.

Q: How do I get a 224 phone number for my business?

A: Contact a telecommunications provider (Verizon, AT&T, T-Mobile, or VoIP services) serving northeastern Illinois to request a 224 number. Most providers offer instant activation with local number selection.

Conclusion

Area code 224 provides essential telecommunications coverage for northern Illinois business and residential communications. With verified coverage across Lake, Cook, Kane, and McHenry counties since January 5, 2002, it offers comprehensive carrier support, NANPA regulatory compliance, and business-friendly features for companies establishing presence in the Chicago metropolitan suburbs.

The overlay serves approximately 7.75 million residents across over 130 cities and towns, representing one of the most economically robust regions in Illinois with a median household income of $99,259.

For detailed technical requirements or specific 224 phone number availability, consult directly with telecommunications providers or visit the NANPA official documentation.

Last updated: January 2025 | Population and demographic data: U.S. Census Bureau 2020 Census and 2023 estimates | For the most current carrier information and number availability, verify with individual service providers.

Frequently asked questions

Algonquin, IL is in area code 224, an overlay for 847 implemented on January 5, 2002.

Area code 224 became active in northeastern Illinois on January 5, 2002, as an overlay to area code 847.

Area code 224 was introduced to address phone number exhaustion in area code 847 due to population growth and rising demand for telecommunication services.

Area code 224 covers portions of Lake, Cook, Kane, and McHenry counties in northeastern Illinois.

Ten-digit dialing (area code + seven-digit number) is mandatory when calling area code 224 numbers.

Major cities covered by area code 224 include Algonquin, Arlington Heights, Buffalo Grove, Carpentersville, Des Plaines, South Elgin, Elk Grove Village, Evanston, Glenview, Gurnee, Highland Park, Hoffman Estates, Lake Forest, Lake in the Hills, Libertyville, Morton Grove, Mount Prospect, Mundelein, Niles, North Chicago, Northbrook, Palatine, Park Ridge, Rolling Meadows, Round Lake Beach, Schaumburg, Skokie, Vernon Hills, Waukegan, Wheeling, Wilmette, and Zion.

Major carriers supporting area code 224 include AT&T, Verizon, T-Mobile, and Sprint, offering landline, wireless, and VoIP services.

Yes, area code 224 supports VoIP (Voice over Internet Protocol) services along with traditional landline and wireless services.

Area code 224 falls under the regulatory oversight of the North American Numbering Plan Administration (NANPA).

Number pooling is a strategy used to optimize phone number allocation. Area code 847, which 224 overlays, was part of the initial trial for number pooling in the U.S. in June 1998.

Area code 847 was created on January 20, 1996, as a split from area code 708.

Area code 224 is an overlay for 847 in northeastern Illinois. It was introduced on January 5, 2002, to address the increasing demand for phone numbers in the region and prevent number exhaustion.

Area code 224 was implemented to alleviate the shortage of phone numbers in the 847 area code region. The growing population and increased demand for telecommunication services necessitated the addition of a new area code.

Area code 224 was activated on January 5, 2002. This overlay to area code 847 was necessary due to the rapid growth and demand for phone numbers in northeastern Illinois.

Ten-digit dialing is required for all calls within the 224 and 847 area codes. This means dialing both the area code and the seven-digit phone number to ensure accurate call routing.

Area code 224 covers several major cities in northeastern Illinois, including Algonquin, Arlington Heights, Buffalo Grove, Des Plaines, Evanston, and Schaumburg, among others. It spans parts of Lake, Cook, Kane, and McHenry counties.

Area code 224 covers portions of Lake, Cook, Kane, and McHenry counties in northeastern Illinois. This overlay for area code 847 serves a significant population and business center.

The North American Numbering Plan Administration (NANPA) is the regulatory body overseeing area code 224. They manage the allocation and assignment of phone numbers across North America, including the implementation of area code overlays.

Area code 224 supports various telecommunication services, including landline, wireless, and VoIP (Voice over Internet Protocol). Major carriers like AT&T, Verizon, T-Mobile, and Sprint offer these services to residents and businesses.

Ten-digit dialing (area code + phone number) is mandatory for area code 224 to ensure accurate call routing and support number pooling. Number pooling helps optimize number allocation and extends their availability.

Number pooling is a strategy used in area code 224 to efficiently allocate phone numbers. By assigning numbers in smaller blocks to service providers, it minimizes wasted numbers and prolongs the availability of phone numbers within the area code.

Area code 847 was introduced on January 20, 1996, as a split from area code 708. Later, area code 224 was implemented as an overlay to 847 in 2002 to address the growing need for phone numbers.

Area code 847 participated in the initial trial for telephone number pooling in the United States in June 1998. This trial paved the way for broader adoption of number pooling as a resource management strategy.

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