Fall 2025 Station Information Profile (SIP) on File with Nielsen

 

Call Letter:	KSAK-FM
Frequency:	90.1
Station Name:	90.1 MT. ROCK
Format:	Variety
Network(s):	IND
City of License:	WALNUT
County of License:	Los Angeles Southeast
Mailing Address:	1100 NORTH GRAND AVE WALNUT, CA 91789
Phone:	909-594-5611
Fax:
URL Address:	www.mtrockradio.com
Broadcasts in HD:
Internet Streams:

Fall 2025 Reminder:

You no longer need to submit program information to Nielsen.

 

To view the simulcast combos that have requested Total Line Reporting, click here .