Cities in area code 773
These are the cities and communities covered by 773 in Illinois. "Covered" means the locality is a rate center holding 773 prefixes; the largest are Chicago Zone 03, Chicago Zone 01, Chicago Zone 02.
Chicago Zone 03, Chicago Zone 01, Chicago Zone 02, Chicago Zone 07, Chicago Zone 04, Chicago Zone 10, Chicago Zone 06 and Chicago Zone 08 hold the largest prefix inventories; and 2 smaller communities down to single-prefix localities. Each locality below links to its rate-center page with the full prefix list.
11 of the localities fall within FCC top-100 metropolitan statistical areas; the rest are smaller communities.
11 of these localities are also reachable through other area codes — overlay territory where the same place answers to several codes.
All of the code's territory keeps Central time.
Remember that people keep numbers when they relocate, so a 773 number is a where-it-was-issued fact, not a where-they-are fact.
| Locality (rate center) | Active prefixes | Metro area | All codes serving it |
|---|---|---|---|
| Chicago Zone 03 | 170 | Chicago-Naperville-Elgin, IL-IN | 708, 773, 872 |
| Chicago Zone 01 | 124 | Chicago-Naperville-Elgin, IL-IN | 312, 630, 708, 773, 847, 872 |
| Chicago Zone 02 | 79 | Chicago-Naperville-Elgin, IL-IN | 773, 872 |
| Chicago Zone 07 | 78 | Chicago-Naperville-Elgin, IL-IN | 312, 773, 872 |
| Chicago Zone 04 | 75 | Chicago-Naperville-Elgin, IL-IN | 312, 773, 872 |
| Chicago Zone 10 | 72 | Chicago-Naperville-Elgin, IL-IN | 773, 872 |
| Chicago Zone 06 | 56 | Chicago-Naperville-Elgin, IL-IN | 773, 872 |
| Chicago Zone 08 | 45 | Chicago-Naperville-Elgin, IL-IN | 773, 872 |
| Chicago Zone 05 | 40 | Chicago-Naperville-Elgin, IL-IN | 773, 872 |
| Chicago Zone 09 | 26 | Chicago-Naperville-Elgin, IL-IN | 773, 872 |
| Chicago Zone 11 | 20 | Chicago-Naperville-Elgin, IL-IN | 773, 872 |
FAQ
What is the biggest city in area code 773?
Chicago Zone 03 holds the most active prefixes (170), making it the code's largest numbering locality.
How many places does 773 cover?
11 rate centers in Illinois hold active 773 prefixes, from Chicago Zone 03 down to communities with a single prefix.
Does a 773 number guarantee the caller lives in one of these places?
No — the tables show where number blocks were issued. Porting and VoIP let people keep or acquire numbers anywhere.