United States Country Codes

Illinois State Flag

Illinois Area Codes

To call Illinois, dial the following:
Exit Code + 1 + Area Code + The Number

* Do not dial the plus (+) symbols

Illinois Information

The United States country code is 1

The local time in Illinois, United States is (CLICK FOR TIME ZONES)

Get the mobile country codes for Illinois, United States.

Information about Illinois:

Illinois on Wikipedia
The currency of United States is the United States Dollar.
The capital of Illinois is Springfield
Largest Cities in Illinois by population: Chicago, Aurora, Rockford, Joliet, Naperville, Springfield, Peoria, Elgin, Waukegan, Cicero

United States Information:

United States on Wikipedia
The currency of United States is the United States Dollar.
United States is often referred to as US or USA.
The nationality of the United States is American.
The capital of United States is Washington, D.C.
Largest Cities in United States by population: New York, Los Angeles, Chicago, Houston, Philadelphia, Phoenix, San Antonio, San Diego, Dallas, San Jose

United States Emergency Numbers

For an emergency in United States, dial the following numbers:

Medical - 911
Fire - 911
Police - 911

Local Telephone Prefix:

1 is the trunk code for United States

United States Map:

The US country code and Illinois US area code chart below gives you the necessary information for calling American cities. For international dialing codes and detailed dialing instructions to Illinois United States, use our drop down boxes at the top of this page or check out our easy-to-use country code search tool.

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Area Codes 991-1020 (of 1286)

Illinois Cities	Illinois Area Codes
Roanoke	309
Robbins	708
Roberts	217 or 815
Robinson	618
Rochelle	815
Rochester	217
Rock City	815
Rock Falls	815
Rock Island	309
Rockbridge	618
Rockford	779 or 815
Rockport	217
Rockton	815
Rockwood	618
Rolling Meadows	224 or 708 or 847
Rome	309
Romeoville	630 or 815
Roodhouse	217
Rosamond	217
Roscoe	815
Roselle	224 or 630 or 847
Roseville	309
Rosiclare	618
Rossville	217
Round Lake	224 or 847
Roxana	618
Royal	217
Royalton	618
Rushville	217 or 309
Russell	847

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Telephone Area Codes For Illinois, United States

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