Received a call on 08/10/2017 at 12:19 PM.  Did not leave voice mail.  Caller ID shows, "Hoffman Esta IL."  Other unsolicited calls I have received from this area code and exchange include:
(847) 839-1022 (Hoffman Esta IL)
(847) 839-1032 (Hoffman Esta IL)
(847) 839-3154 (FRIENDSHIPVLLGE)
(847) 839-3451 (Hoffman Esta IL)
(847) 839-4509 (Hoffman Esta IL)
(847) 839-4788 (Hoffman Esta IL)
(847) 839-4807 (Hoffman Esta IL)
(847) 839-5189 (Hoffman Esta IL)
(847) 839-5406 (Hoffman Esta IL)
(847) 839-5649 (SAFECO PRO & CA)
(847) 839-6300 (Hoffman Esta IL)
(847) 839-6343 (Hoffman Esta IL)
(847) 839-6542 (VOICE PROCESSIN)
(847) 839-6925 (LAIRD TECH)
(847) 839-7003 (HQ GLOBAL WORKP)
(847) 839-7003 (OMRON ELEC)
(847) 839-8937 (Hoffman Esta IL)
(847) 839-9304 (Hoffman Esta IL)
(847) 839-9908 (Hoffman Esta IL)