Caller ID shows "CASE LAW FIRM T". No message left on my voicemail.

Whitepages.com:
(312) 775-9059
Owner's name hidden by Whitepages for privacy reasons
Owner is based in Chicago, IL
Landline - Ameritech

Reversephonelookup.com:
Area Code (NPA):    312
Exchange (NXX):    775
Original Service Provider:    AT&T ILLINOIS
Zip Code Coverage:    60686, 60688, 60689
Original Service Type:    Landline
Carrier Type:    Regional Operating Company
Original Coverage Area:    Chicago Zone 1, IL
Switch CLLI Code:    CHCGILCLDS3