To faciltiate users, the United States of America is divided into regions known as Area Codes, corresponding to particular geographic telephone dialing areas.
An area code denotes the regional location of a phone number within the United States.
The Area Code table below shows an area codes each.
Area Code 773 listing, by city
@The cities listed with each area code are the major cities for that area code;
| City / State | Area code | Zip Code | County | Iso | |
|---|---|---|---|---|---|
| Arlington Heights (Illinois) | 773 | 60005 | Cook | US-IL | |
| Calumet City (Illinois) | 773 | 60409 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60613 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60622 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60626 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60633 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60639 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60640 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60641 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60644 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60645 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60651 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60655 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60607 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60618 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60624 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60652 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60653 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60656 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60657 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60654 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60602 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60623 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60638 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60661 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60656 | Cook | US-IL | |
| Chicago (Illinois) | 773 | 60606 | Cook | US-IL | |
| Cicero (Illinois) | 773 | 60804 | Cook | US-IL | |
| Cicero (Illinois) | 773 | 60804 | Cook | US-IL | |
| Des Plaines (Illinois) | 773 | 60016 | Cook | US-IL | |
| Des Plaines (Illinois) | 773 | 60016 | Cook | US-IL | |
| Dolton (Illinois) | 773 | 60419 | Cook | US-IL | |
| Elmwood Park (Illinois) | 773 | 60707 | Cook | US-IL | |
| Evergreen Park (Illinois) | 773 | 60805 | Cook | US-IL | |
| Hinsdale (Illinois) | 773 | 60521 | DuPage | US-IL | |
| Lincolnwood (Illinois) | 773 | 60712 | Cook | US-IL | |
| Lyons (Illinois) | 773 | 60534 | Cook | US-IL | |
| Mount Prospect (Illinois) | 773 | 60056 | Cook | US-IL | |
| Oak Brook (Illinois) | 773 | 60523 | DuPage | US-IL | |
| Oak Park (Illinois) | 773 | 60302 | Cook | US-IL | |
| Palos Hills (Illinois) | 773 | 60465 | Cook | US-IL | |
| River Grove (Illinois) | 773 | 60171 | Cook | US-IL | |
| Summit Argo (Illinois) | 773 | 60501 | Cook | US-IL | |
| Wood Dale (Illinois) | 773 | 60191 | DuPage | US-IL | |
| Wood Dale (Illinois) | 773 | 60191 | DuPage | US-IL |