Numbers with this prefix were first introduced in 1999.While 7737869555 was originally issued with the info above, the owner of the phone number (773) 786-9555 may have transferred it through a process called porting.
Caller name: Chicago illinois
Caller type: Debt Collector
Said thet were irs. Threatened me with jailtime for tax evasion and tax fraud. They went to vm. Was a recording that called. Pretty sure it's a scam. Gave me 24 yrs to call back and when I did it was a busy signal