Phone number reference · United States
773 area code
Much of Chicago outside its central 312 numbering area.
773 is associated with much of Chicago beyond the central 312 area. The 872 overlay serves both regions. Chicago's suburbs have other numbering arrangements, so a 773 number should not be treated as a complete description of the metropolitan area or a customer's present address.
Chicago outside the central 312 region
Geographic code · In service
773 at a glance
- Region
- Chicago outside the central 312 region
- Time zone
- Central Time
- In service since
- 12-Oct-1996
- Overlay arrangement
- 773/872
Numbering details checked September 21, 2026 against the NANPA database. See the official area-code maps for boundaries.
Questions about 773
Can a Chicago customer have 773 or 872?
Yes. 872 overlays the 773 region as well as 312. Keep the full number and ask for the neighborhood or service address rather than filtering Chicago inquiries to one prefix.
Is a 773 call safe to answer?
The 773 prefix identifies a numbering region, not a caller's identity or trustworthiness. Verify an unexpected request by contacting the organization through a number you already know.
Can I get a 773 business number?
Search the available numbers in VeraDial. Inventory changes, so a 773 number is not guaranteed. You can also keep your current carrier number and forward voice calls to a VeraDial line; existing texts stay with your carrier.
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