Who called from 3129291870

I received a call from this number, when i tried calling back it also sent me directly to a vm, i just wish it would stop calling me.

312-929-1870 called this afternoon but left no voice mail message.  Added it to the blocked number list on my Digitone Call Blocker 10 gadget.

Caller ID displayed  "CHICAGO"

Woman called and said she was calling from K-hits and then some garble I could not understand.  Told her I don't listen to that station.  Was confused as my caller ID said STOP THE IL TAX.  So I hung up.

Left no message.

GETTING CALLS FROM 312-929-1870 ALMOST DAILY AND THEY NEVER LEAVE A MESSAGE.  CALLER ID LISTS THE NUMBER AS "STOP IL TAX".  I ASSUME IF THEY DO NOT LEAAVE A MESSAGE, THEY ARE NOT LEGITIMATE.