773 Area Code: Location, Map, Time Zone, and Phone Numbers

The 773 area code serves most of the City of Chicago, Illinois—specifically covering neighborhoods outside the downtown Loop. It lies within the Central Time Zone (CST/CDT).

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What Is the 773 Area Code?

The 773 area code is a telephone area code under the North American Numbering Plan (NANP). Introduced in the mid-1990s, it’s assigned to the city of Chicago, excluding the downtown “Loop” that remains under area code 312 .

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History and Evolution of 773

Why and When It Was Created

Rapid population growth, coupled with the rise of pagers, cell phones, and other devices, pushed Chicago’s single area code, 312, past capacity. To prevent overload, authorities split off the city outside downtown into a new area code—773—effective October 12, 1996 .

Overlay with Area Code 872

In 2007, planning began for an overlay to manage more number demand. Area code 872 was officially overlaid onto both 312 and 773 starting November 7, 2009, requiring ten-digit dialing even for local calls .

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Geographic Coverage

City and Neighborhoods

773 envelopes the parts of Chicago outside the Loop—think Lakeview, Logan Square, Irving Park, Hyde Park, and more across the north, west, and south sides .

Counties It Covers

While it’s centered on Chicago and Cook County, the code also wraps into parts of DuPage County, though minimally compared to Cook .

Major Cities and Suburbs

Beyond Chicago proper, 773 includes suburbs such as Cicero, Evanston, Arlington Heights, Des Plaines, Oak Park, Mount Prospect, among others—encompassing roughly 23 cities .

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Time Zone & Dialing Protocol

Time Zone Details

This area code adheres to Central Standard Time (UTC-6) during fall/winter, shifting to Central Daylight Time (UTC-5) in spring and summer .

Dialing Practices

Since the 872 overlay began in 2009, all local calls require ten-digit dialing (area code + number)—even within the same area code .

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Demographics & Economic Snapshot

Population Stats

The combined 312/773/872 region forms one of the largest local calling areas in the U.S., meaning most calls across the metro don’t incur long-distance charges .

Income and Households

In the 773 area code region, estimated median household income is around $83,000. A large share of households—nearly 40%—earn over $100,000 annually. Average family sizes trend around three people .

Age & Gender Breakdown

Residents average around age 37. Most fall between ages 20 and 50, with smaller representation among younger children and older adults. Slightly more than half of residents are female .

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Prefix Patterns & Phone Type Composition

Active Prefixes

Prefix assignments in 773 span a wide range. Notable prefixes include 773-200 through 773-800+, across Chicago and surrounding communities .

Landline vs Wireless Allocation

In one dataset, about 57% of prefixes are attributed to landlines, while 43% are wireless. Only a small fraction remains inactive .

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Everyday Significance and Local Culture

Neighborhood Identity

773 is more than just digits—it reflects neighborhood identity. Locals often associate the code with Chicago’s diverse and vibrant communities, particularly outside the downtown core .

Pop Culture Nods

Interestingly, the Netflix show The Bear includes a tribute to 773—Carmy Berzatto has it inked as a tattoo, further linking the code to Chicago’s cultural narrative .

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Quick Reference Table

| Attribute | Details |
|————————|————————————————————————-|
| Region | Chicago (outside the Loop) and select suburbs |
| Time Zone | Central Standard/Daylight Time (UTC -6 / -5) |
| Introduced | October 12, 1996 |
| Overlay Added | Area code 872 in 2009 |
| Dialing Format | 10-digit dialing required since overlay |
| Counties | Primarily Cook, some DuPage |
| Income | Median household ~$83K; ~40% earn >$100K |
| Prefix Allocation | Mix of landline and wireless across many prefixes |

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Conclusion

773 is Chicago’s expansive area code—covering nearly all city neighborhoods outside the Loop and parts of neighboring suburbs. Introduced in 1996 to manage growing demand, it now operates alongside 312 and overlay 872, requiring ten-digit dialing. This area strip captures a wide demographic and cultural cross-section—diverse neighborhoods, strong economic indicators, and deeply embedded community identity. Whether you’re dialing a number or tracing neighborhood identity, 773 tells an authentic Chicago story.

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FAQs

Where exactly does area code 773 apply in Chicago?

It covers most neighborhoods outside Chicago’s downtown Loop—places like Lakeview, Hyde Park, and Irving Park—as well as several nearby suburbs .

What time zone is used in the 773 area code?

773 uses Central Time—UTC‑6 during standard time and UTC‑5 during daylight saving periods .

When was area code 773 introduced?

The area code went into service on October 12, 1996, following a split from 312 due to growing demand .

Do I need to dial ten digits for local calls in this area?

Yes. Since the 872 overlay was added in 2009, ten-digit dialing is mandatory, even for local calls within the same area .

Is 773 a toll-free area code?

No, it’s a standard geographic code. Toll-free numbers begin with prefixes like 800 or 888—773 operates under normal local rate rules .

What neighborhoods or suburbs are included in 773?

It includes places like Cicero, Evanston, Des Plaines, Oak Park, Mount Prospect, Arlington Heights, and others across Cook and parts of DuPage County .