Where is area code 773?

Area code 773 covers Chicago, Illinois, excluding downtown neighborhoods. It serves most of the city's northwest, west, and north side neighborhoods.

What are the area codes for Illinois?

Illinois has multiple area codes including 312, 773, 872 (Chicago), 847, 224 (northern suburbs), 630, 331 (western suburbs), and others covering central and southern parts of the state.

What is the 773 area code an overlay for?

773 is an overlay for the 312 area code. Both serve the same geographic region in Chicago and require 10-digit dialing due to number exhaustion.

What is an overlay area code?

An overlay area code is added to a geographic region already served by another area code. It allows for more phone numbers without requiring existing users to change their numbers.

How many area codes are in the USA?

There are over 300 active area codes in the United States. Overlays and new codes are introduced regularly to meet growing demand.

Is there a pattern to area codes in US phone numbers?

Originally assigned by geography and population size, area codes now follow overlays and other rules to keep up with growth, making them more flexible, though less geographically consistent.

773 Area Code
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Looking to grow your business in Chicago and build stronger customer connections? A 773 area code number helps you build local trust and boost answer rates — without having a physical office in Illinois.

DialLink makes it easy for SMBs and startups to get a local number with powerful features like AI voice agents, call handling automation, and an intuitive setup. The 773 area code is an overlay for the original 312 area code, and both now serve the same central Chicago area, including The Loop and many surrounding neighborhoods.

Why Choose a 773 Area Code?

The 773 area code covers central and northwestern portions of Chicago, including many neighborhoods just outside The Loop. It was introduced as an overlay to the 312 area code to expand number availability in the area. This means both area codes serve the same region and are equally recognizable to local residents and businesses.

Whether you're a local entrepreneur, a growing startup, or a national company targeting the Chicago market, a 773 number positions you as local and trustworthy.

From finance and logistics to tech and media, Chicago is a high-value market full of opportunity. A 773 number gives your business a credible presence in the Windy City.

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773 Area CodeGet a Local Chicago Phone Number with DialLink