(773) 788-9100

5 FTC complaints between Mar 2, 2026 and Apr 21, 2026.

The FTC complaints came in every month from Mar 2026 to Apr 2026; the busiest was Apr 2026, with 4 of 5.

FTC complaints are filed by consumers with the U.S. Federal Trade Commission's Do Not Call registry; they aren't verified by the FTC or by us.

What callers claimed

5 of its 5 FTC complaints (100%) are about medical and prescription offers, against 11% of the 33,158 FTC complaints about all numbers in area code 773.

Complaint categories chosen by FTC complainants:

• Medical & prescriptions 5 · 100%

The number's block is assigned to Illinois Bell Tel Co.

Time of day of 5 calls; most often the 9 a.m. hour (4):

The date and time of the call as complainants entered them on the FTC form; the time zone isn't recorded. Times entered as exactly midnight or noon are left out (they're usually the form's default).

Rate centre (NANPA abbreviation)

CHICGOZN08, IL, USA

Block assigned to

Illinois Bell Tel Co

From the North American Numbering Plan Administrator (Nov 3, 2026). This is who the number block was assigned to; numbers can be moved between carriers, and caller IDs can be faked.

5 of 5 complainants (100%) have area code 773, the number's own. Scam callers often show a local-looking number (“neighbour spoofing”); a local business calling nearby customers looks the same.

Area code 773: where it is, time zone, spam calls →

• Don't share personal or banking details, or pay anyone, on a call you didn't expect. Hang up and call the organization back on a number you find yourself.
• Block it from your recent calls (iPhone: ⓘ, then “Block this Caller”; Android: long-press, then “Block”).
• Report fraud to the Canadian Anti-Fraud Centre (1-888-495-8501).
• Report telemarketing if you're registered and still got the call: to the National Do Not Call List.
• A collector calling? How to check a collection agency in your province.
• Report fraud to the FTC.
• Report telemarketing if you're registered and still got the call: to the National Do Not Call Registry.
• A collector calling? See the FTC's guide to your rights.
• Report fraud: in the U.S. to the FTC; in Canada to the Canadian Anti-Fraud Centre (1-888-495-8501).
• Report telemarketing if you're registered and still got the call: in the U.S. to the National Do Not Call Registry; in Canada to the National Do Not Call List.
• A collector calling? In the U.S., see the FTC's guide to your rights; in Canada, how to check a collection agency in your province.

Who called me from (773) 788-9100?

No complaint names the caller; FTC complainants most often said the calls were about medical and prescription offers. The number is in a block assigned to Illinois Bell Tel Co (rate centre CHICGOZN08, IL) (NANPA, Nov 3, 2026); numbers can move between carriers, so the caller's provider may differ.

Is (773) 788-9100 a scam?

Canadial rates it medium risk, from 5 complaints, latest Apr 21, 2026, 100% robocalls.

Is (773) 788-9100 a debt collector or collection agency?

Nothing says it is: none of its 5 complaints describe debt collection.

Should I call (773) 788-9100 back?

No. Calling back can confirm that your line is answered. If the caller claimed to be a company or agency you deal with, contact it on a number you find yourself.

How many times has (773) 788-9100 been reported?

5 complaints to the U.S. FTC's Do Not Call registry between Mar 2, 2026 and Apr 21, 2026.

What do callers from (773) 788-9100 say?

5 of its 5 FTC complaints (100%) are about medical and prescription offers, against 11% of the 33,158 FTC complaints about all numbers in area code 773.

When does (773) 788-9100 call?

In FTC complaints, the most common time was the 9 a.m. hour (4 of 5 calls with a time); the most common day was Tuesday (4 of 5).