773 Area Code
Covers Chicago and nearby communities in Illinois.
(773) 555-0142Area code 773 map
Interactive coverage map for area code 773, centered on Chicago, Illinois
41.8847, -88.2040
Open in OpenStreetMapArea code 773 coverage map — centered on Chicago. Shaded area shows the approximate reach around the primary city.
773 is the area code for Chicago and the surrounding part of Illinois. It reaches roughly 2.7 million people across places such as Chicago, West Chicago and more. The region observes Central time, so a number like (773) 555-0142 is on that clock right now. On the ground it spans Cook, Dupage. It shares its territory with the overlay codes 872, 331, 630, which sit on the exact same map. Because the 773 region uses more than one area code, you must dial all ten digits — area code included — even for a local call. You do not, however, need to dial a leading 1 for calls within the US and Canada. Scroll on for a real-time clock, an area map, the cities and counties inside 773, its related area codes, and practical advice on 773 robocalls and caller-ID spoofing.
Cities covered by 773
Cities & neighborhoods
- Chicago
- West Chicago
Nearby & overlay area codes
Overlay codes (same area)
These share 773’s geography — a number in either code can be on the same street.
Neighboring codes
Codes for adjacent regions and metros.
Is a call from 773 a scam?
Because 773 covers a dense metro around Chicago, it's a common source of both real business calls and spam. Legitimate 773 calls come from local businesses, offices and neighbors; scam calls in this region tend to imitate delivery services, banks and utilities. Remember that caller ID is trivially spoofed — a scammer anywhere can make a 773 number appear on your screen — so the area code alone never proves a call is genuinely local.
Red flags to watch for
- Pressure to act right now, or threats of arrest, fines, or service being cut off.
- Requests to pay with gift cards, wire transfer, crypto, or a payment app.
- Asking for passwords, one-time codes, your SSN, or full card/bank numbers.
- A robocall or recording, or a number that won’t let you call back.
When unsure, hang up and call the organization back on a number you look up yourself.
Calling a 773 number from abroad
Every 773 number is a US/Canada +1 number. From a mobile anywhere, the simplest approach is to dial it in international format:
+1 773 555-0142If your phone can’t dial the +, replace it with your country’s exit code, then 1, then the number:
- UK, Germany, France & most of Europe
00 1 773 555-0142 - Australia
0011 1 773 555-0142 - Japan
010 1 773 555-0142 - Mexico
00 1 773 555-0142
Within the US and Canada you don’t need any of this — just dial the ten digits 773 555-0142.
Reverse phone lookup
Check any US or Canada number to see whether it's a working line, which carrier it sits on, whether it's mobile, landline or VoIP, and roughly where it's registered.
Shows carrier, line type and location. Owner name isn't available here.
Results are for personal, informational use only and may not be used for employment, credit, housing or tenant-screening decisions.
Area code 773: frequently asked questions
Where is the 773 area code located?
The 773 area code is located in Illinois, centered on Chicago. It covers Cook, Dupage and nearby communities including Chicago, West Chicago.
What time zone is 773 in?
Area code 773 is in the Central time zone (UTC-6 (CST) / UTC-5 (CDT)). You can see the exact current local time for Chicago on the live clock above.
What cities use area code 773?
Cities and areas that use 773 include Chicago, West Chicago. Its primary city is Chicago, IL.
Do I need to dial 1 before 773?
For calls within the US, you do not need to dial a leading 1, but you do need all ten digits: 773 plus the seven-digit number. The 773 area requires ten-digit dialing because more than one area code serves it.
Is 773 a toll-free or scam number?
No — 773 is a normal geographic area code for Chicago, not a toll-free code (toll-free codes are 800, 833, 844, 855, 866, 877 and 888). A 773 number is not inherently a scam, but the code can be spoofed. See the spam-call section above for how to tell.
What are the overlay area codes for 773?
Area code 773 is overlaid by 872, 331, 630, meaning those codes cover the same geographic area.