The telephone area code 773 was formed in the city of Chicago, Illinois, USA in 1996. The entire city of Chicago—and all of Chicagoland—were originally area code 312, but eventually the city itself was split between 312 in the Downtown/Loop and surrounding areas, and 773, comprising the vast physical majority of the city and all outlying areas within city limits. Flag Seal Nickname: The Windy City Motto: Urbs In Horto (Latin: City in a Garden), I Will Location Location in Chicagoland and northern Illinois Coordinates , Government Country State Counties United States Illinois Cook, DuPage Mayor Richard M. Daley (D) Geographical characteristics Area     City 606. ... Official language(s) English Capital Springfield Largest city Chicago Area  Ranked 25th  - Total 57,918 sq mi (149,998 km²)  - Width 210 miles (340 km)  - Length 390 miles (629 km)  - % water 4. ... 1996 (MCMXCVI) was a leap year starting on Monday of the Gregorian calendar, and was designated the International Year for the Eradication of Poverty. ... Chicagoland is an informal name for the Chicago metropolitan area, used primarily by copywriters, advertising agencies, native residents, and traffic reporters. ... Area code 312 encompasses the Chicago Loop and surrounding areas in Chicago, Illinois. ...

While most large business and tourists identify with the 312 part of Chicago, the city as a whole is strongly identified by its diverse and vibrant neighborhoods, and most Chicago neighborhoods fall within the 773 area code. The area code has also been popularized by a series of t-shirts with the slogan "773 FOREVER", a reflection of residents' strong sense of pride and attachment to the area and their identification with urban living over the suburbs.^{[citation needed]} Neighbourhood is also a term in topology. ...

The inclusion of the 773 area code comes about because of the actions of the North American Numbering Plan Administration (NANPA) body that will be overseeing the creation of many new area codes in the coming years.^{[citation needed]} The North American Numbering Plan (NANP) is a system for three-digit area codes and seven-digit telephone numbers that direct telephone calls to particular regions on a public switched telephone network (PSTN), where they are further routed by the local network. ...

See also

• List of North American area codes

This is a list of North American telephone area codes in effect for the North American Numbering Plan. ... A state is a set of institutions that possess the authority to make the rules that govern the people in one or more societies, having internal and external sovereignty over a definite territory. ... Official language(s) English Capital Springfield Largest city Chicago Area  Ranked 25th  - Total 57,918 sq mi (149,998 km²)  - Width 210 miles (340 km)  - Length 390 miles (629 km)  - % water 4. ... The 217 area code currently covers much of Central Illinois, including the capital city of Springfield as well as the cities of Champaign, Urbana, Decatur, Danville, Quincy, and Rantoul. ... Both area code 847 and area code 224 are part of an overlay plan that covers most of Lake County, the northern part of Cook County, the northern part of Kane County, and a small part of McHenry County in Illinois. ... Area code 309 is the telephone area code serving the state of Illinois. ... Area code 312 encompasses the Chicago Loop and surrounding areas in Chicago, Illinois. ... Area code 618 is the telephone area code serving the state of Illinois. ... In the United States telephone system, Area code 630 covers the entirety of Dupage County in Illinois. ... Area code 708 covers western and southern Cook County and eastern and southern Will County in Illinois. ... Area code 815 is a telephone area code for the northwestern corner and southern Chicagoland suburbs of the state of Illinois. ... 847 This page is a candidate for speedy deletion. ... 847 This page is a candidate for speedy deletion. ... In the United States telephone system, Area code 630 covers the entirety of Dupage County in Illinois. ... Area code 312 encompasses the Chicago Loop and surrounding areas in Chicago, Illinois. ... Lake Michigan is one of the five Great Lakes of North America, and the only one in the group located entirely within the United States. ... Area code 708 covers western and southern Cook County and eastern and southern Will County in Illinois. ...

	Illinois Area codes 217 | 224 | 309 | 312 | 618 | 630 | 708 | 773 | 779 | 815 | 847