Universal Licensing System
WRKD904
SOLANO, COUNTY OF
License details
| ULS identifier | 4364802 |
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| Call sign | WRKD904 |
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| Radio service | MW |
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| Status | A |
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| Grant date | 2020-12-17 |
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| Expiration | 2030-12-17 |
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| Frequency range | 10975 - 11075 MHz (2 frequencies) |
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| Locations | 1 |
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| Coordinates | 38.1400000, -122.2223889 |
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| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-08-02 02:44:37 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FXO | 10975.00000000 | | | | | |
| 1 | 2 | FXO | 11075.00000000 | | | | | |
| 1 | 2 | FXO | 11075.00000000 | | | | | |
| 1 | 2 | FXO | 11075.00000000 | | | | | |
| 1 | 2 | FXO | 11075.00000000 | | | | | |
| 1 | 2 | FXO | 11075.00000000 | | | | | |
| 1 | 2 | FXO | 11075.00000000 | | | | | |
| 1 | 2 | FXO | 11075.00000000 | | | | | |
| 1 | 2 | FXO | 11075.00000000 | | | | | |
| 1 | 2 | FXO | 11075.00000000 | | | | | |
| 1 | 2 | FXO | 11075.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 10975.00000000 | | 40M0D7W |
| 1 | 2 | 11075.00000000 | | 30M0D7W |
| 1 | 2 | 11075.00000000 | | 30M0D7W |
| 1 | 2 | 11075.00000000 | | 30M0D7W |
| 1 | 2 | 11075.00000000 | | 30M0D7W |
| 1 | 2 | 11075.00000000 | | 30M0D7W |
| 1 | 2 | 11075.00000000 | | 30M0D7W |
| 1 | 2 | 11075.00000000 | | 30M0D7W |
| 1 | 2 | 11075.00000000 | | 30M0D7W |
| 1 | 2 | 11075.00000000 | | 30M0D7W |
| 1 | 2 | 11075.00000000 | | 30M0G7W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | Cummings Peak, 2 Km SE of, Crockett, CONTRA COSTA, CA | 38.02911111, -122.19752778 | 269.700 m | LTOWER | 36.600 m structure / 36.600 m overall | N |
| 2 | R | | 38.07783333, -122.16183333 | 175.000 m | | | |
| 3 | R | | 38.14000000, -122.22238889 | 34.700 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | RFS SC3-W100A | | V | 38.3000 | 30.1000 | | |
| 1 | 2 | R | RFS SC3-W100A | | | 38.3000 | | | |
| 1 | 3 | R | ANDREW SHPX4-11W | | | 41.0000 | 0.0000 | | |
| 2 | 1 | T | ANDREW SHPX4-11W | | V | 41.0000 | 350.0000 | | |
License history
| Date | File or call sign | Action |
|---|
| 2026-07-14 | WRKD904 | LETCNS |
| 2025-07-30 | WRKD904 | LIAUA |
| 2025-04-11 | WRKD904 | LIMOD |
| 2022-04-07 | WRKD904 | LIAUA |
| 2021-12-03 | WRKD904 | LIAUA |
| 2021-03-09 | WRKD904 | LIAUA |
| 2020-12-17 | WRKD904 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 4364802 | 2026-08-02 02:44:37 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WRKD904 | ULS 4364802 | 2026-08-02 02:44:37 |
| Status | A | ULS 4364802 | 2026-08-02 02:44:37 |
| Service | MW | ULS 4364802 | 2026-08-02 02:44:37 |
| Grant Date | 2020-12-17 | ULS 4364802 | 2026-08-02 02:44:37 |
| Expiration Date | 2030-12-17 | ULS 4364802 | 2026-08-02 02:44:37 |