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Area Code Overview
Area code 224 is a geographic telephone area code in Illinois that went into service on January 5, 2002. The geographic regions covered by this area code overlay has a population of approximately 3,995,010.
Overlay and Dialing Rules
- Area Code: 224
- State: Illinois
- Type: General Purpose Code
- In Service Date: January 5, 2002
- Overlay Complex: 224/847
- Local Dialing Plan: This area requires you to dial 1 and the area code when calling locally.
Estimated Number of Assigned Phone Numbers in Area Code 224
This area code is ranked 152nd out of 363 nationwide in estimated assigned phone numbers. Within the state territory it serves, it is ranked 10th out of 16.
5,497,000
Estimated Service-Type Mix of Assigned Phone Numbers in Area Code 224
Wireless
2,765,000 assigned
50.30%
Wireline and VoIP
2,267,000 assigned
41.24%
Other / Unclassified
465,000 assigned
8.46%
Estimated Share of Wireless Numbers Originally Assigned to Each Carrier in Area Code 224
Estimated assigned wireless phone numbers: 2,765,000
Numbers may later be ported to another carrier, but this chart reflects original number assignment, not current subscriber share.
T-Mobile 1,188,000 (42.97%)
Verizon Wireless 809,000 (29.26%)
AT&T Wireless 768,000 (27.78%)
Estimated Share of Wireline and VoIP Numbers Originally Assigned to Each Carrier in Area Code 224
Estimated assigned wireline and VoIP phone numbers: 2,267,000
Bandwidth 284,000 (12.53%)
Comcast Business 144,000 (6.35%)
Peerless Network 135,000 (5.96%)
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 98,000 (4.32%)
PAETEC ITEL, LLC 70,000 (3.09%)
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 67,000 (2.96%)
Other / Unclassified Assigned Numbering in Area Code 224
Estimated assigned other or unclassified phone numbers: 465,000
FIRST COMMUNICATIONS, LLC 126,000 (27.10%)
TELEPORT COMMUNICATIONS AMERICA, LLC - IL 124,000 (26.67%)
IP HORIZON LLC 81,000 (17.42%)
ACCESS ONE, INC. - IL 36,000 (7.74%)
STRATUS NETWORKS 34,000 (7.31%)
FRACTEL, LLC 28,000 (6.02%)
TON80 COMMUNICATIONS, LLC 26,000 (5.59%)
HD CARRIER LLC 4,000 (0.86%)
MCC TELEPHONY LLC 3,000 (0.65%)
CLEAR RATE COMMUNICATIONS, LLC 1,000 (0.22%)
Cities and Towns in Area Code 224
Algonquin, Illinois Antioch, Illinois Arlington Heights, Illinois Barrington, Illinois Bartlett, Illinois Bensenville, Illinois Cary, Illinois Chicago, Illinois Deerfield, Illinois Des Plaines, Illinois Dundee, Illinois Elgin, Illinois Elk Grove, Illinois Evanston, Illinois Fox Lake, Illinois Franklin Park, Illinois Glencoe, Illinois Glenview, Illinois Grayslake, Illinois Half Day, Illinois Hampshire, Illinois Highland Park, Illinois Hinsdale, Illinois Huntley, Illinois Itasca, Illinois La Grange, Illinois Lake Forest, Illinois Lake Villa, Illinois Lake Zurich, Illinois Libertyville, Illinois Mundelein, Illinois Northbrook, Illinois Palatine, Illinois Park Ridge, Illinois Plato Center, Illinois Roselle, Illinois Round Lake, Illinois Skokie, Illinois Summit, Illinois Wauconda, Illinois Waukegan, Illinois Wheeling, Illinois Wilmette, Illinois Winnetka, Illinois Zion, Illinois These geographic regions are also served by area code 847.
How These Figures Were Built
These figures are estimates based on public phone-number assignment records. They are meant to show the likely mix of assigned phone numbers associated with area code 224, not live customer counts.
Some providers may have assigned phone numbers tied to this area code even if they do not actively market or sell service locally. These figures reflect public number-assignment records, not confirmed local service availability.
They also do not reflect number portability at the individual phone-number level, so some numbers may now be used on a different network or by a different provider than the original assignment records suggest.
Population data and locality matching provided by GeoNames.
Last refreshed: April 15, 2026 6:22 pm