The 773 area code is located in the state of Illinois, and according to Intelius data, covers roughly 1,468,533 phone numbers and 2,017,862 listings across 796 prefixes.
This is a General Purpose Code, in service since October 12, 1996.
Area code 773 is part of an overlay complex shared with:
Area code 773 was split from area code 312.
Local and long-distance calls within area code 773 both require 1 plus 10 digits dialing.
Have you received a call from a number with a 773 area code? Figure out who is calling you by performing a reverse phone lookup search. Intelius can provide you with a phone report that includes (when available) original line type and carrier, the number owner’s name, last known address and past addresses, age, possible relatives, and more.
| County Population (2025) | 5,194,625 |
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