Universal Licensing System
WKK21
INFINITY BROADCASTING CORPORATION OF ILLINOIS
License details
| ULS identifier | 987194 |
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| Call sign | WKK21 |
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| Radio service | AS |
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| Status | C |
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| Grant date | 1972-03-10 |
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| Expiration | 2004-12-01 |
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| Cancellation | 1999-09-20 |
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| Frequency range | 948.875 MHz |
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| Locations | 2 |
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| Representative location | CHICAGO, COOK, IL |
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| Coordinates | 41.8941944, -87.6172500 |
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| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-08-02 02:46:55 |
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Licensee
| Name | INFINITY BROADCASTING CORPORATION OF ILLINOIS |
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| Applicant type | C |
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| FRN | 0003476074 |
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| Location | WASHINGTON, DC |
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| Address | 600 NEW HAMPSHIRE AVE NW STE 1200, WASHINGTON, DC, 20037 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
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| 1 | 1 | FXO | 948.87500000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
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| 1 | 1 | 948.87500000 | | 430KF9W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
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| 1 | T | 666 N LAKE SHORE DR, CHICAGO, COOK, IL | 41.89419444, -87.61725000 | 180.400 m | | 116.700 m overall | |
| 2 | R | | 41.99225000, -88.02672222 | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
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| 1 | 1 | T | | | | 17.6000 | 288.5000 | | |
| 1 | 2 | R | | | | | | | |
License history
| Date | File or call sign | Action |
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| 1999-10-14 | WKK21 | LICAN |
| 1999-08-13 | WKK21 | LICCNV |
| 1999-01-12 | WKK21 | COR |
Sources and provenance
| Source | Source record | Retrieved | Match |
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| ULS | 987194 | 2026-08-02 02:46:55 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
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| Call Sign | WKK21 | ULS 987194 | 2026-08-02 02:46:55 |
| Status | C | ULS 987194 | 2026-08-02 02:46:55 |
| Service | AS | ULS 987194 | 2026-08-02 02:46:55 |
| Grant Date | 1972-03-10 | ULS 987194 | 2026-08-02 02:46:55 |
| Expiration Date | 2004-12-01 | ULS 987194 | 2026-08-02 02:46:55 |
| Cancellation Date | 1999-09-20 | ULS 987194 | 2026-08-02 02:46:55 |