A sublet in Lakeview or Hyde Park draws calls from strangers.
Put a 773 number on the listing, take the calls on your own phone and burn the number the day the sublet is taken.
Ask for 773 when you create a number on ExpressNumber, and the number you hand out reads as Chicago, from Rogers Park to the South Side. Calls ring the phone in your pocket, and you burn the number when you are done.
Put a 773 number on the listing, take the calls on your own phone and burn the number the day the sublet is taken.
Post a 773 number, set it to Texts only and end the number once the tickets are gone.
Print a 773 number on the card and the window. When the business changes hands, burn the number with it.
Area code 773 covers the City of Chicago outside the Loop, including O'Hare and Midway airports.
The Illinois Commerce Commission describes it as the outlying northern, western and southern neighborhoods of the city, while 312 serves only downtown and the Loop. The numbering administrator's 1996 map of the split names Rogers Park, Edgewater, Lakeview, Austin, Hyde Park, Beverly, Pullman and South Chicago.
Chicago, IL
Area code 773 and the codes around it, oldest first.
1947
312
Split from
1996
773
This code
2009
872
Shares the area
From the public records of the body that runs US phone numbering, read October 21, 2026.
773 was split from 312 and entered service on October 12, 1996. The Loop kept 312, and the rest of the city took the new code.
The last available 773 prefix was assigned on July 9, 2009. A third code, 872, was laid over both 312 and 773, and since November 7, 2009 every local call has been dialed as 1 plus all ten digits.
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More in the full FAQ.
Create a number in your dashboard, type 773 as the area code and give it a name, such as Sublet listing. It is live in about a minute. You do not need to live in Chicago: calls ring the phone you already carry.
Yes, for taking calls and texts. A baker, a mover or a bike repair stand can put a 773 number on the sign and the website, take the calls on their own phone and burn the number when the work moves on.
Yes. 312, 773 and 872 all cover the City of Chicago, and a local call between them is dialed with 1 plus all ten digits. 312 started in 1947, 773 in 1996 and 872 in 2009.
No. Your numbers are receive-only: they take calls and texts, and they never make them. You answer calls on your own phone, and you cannot reply to a text from the inbox.
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More area codes
The state, the dates and the related codes are rows of the North American Numbering Plan Administrator's area code database. The places are from its planning letters and the state’s own pages. Read October 21, 2026.
Hand out a number you can burn. Keep the one your family calls.
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