Winter 2026 Station Information Profile (SIP) on File with Nielsen
| Call Letter: | KOSC-FM | |
| Frequency: | 89.9 | |
| Station Name: | Classical California | |
| Format: | Classical | |
| Network(s): | IND | |
| City of License: | ANGWIN | |
| County of License: | Napa | |
| Mailing Address: | 1149 S Hill St, Suite H-100 LOS ANGELES, CA 90015 |
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| Phone: | 213-225-7400 | |
| Fax: | ||
| URL Address: | kdfc.com | |
| Broadcasts in HD: |
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| Internet Streams: |
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Winter 2026 Reminder:
You no longer need to submit program information to Nielsen.
To view the simulcast combos that have requested Total Line Reporting, click here .