Universal Licensing System
WNNJ611
DURHAM SCHOOL SERVICES
License details
| ULS identifier | 1580774 |
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| Call sign | WNNJ611 |
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| Radio service | GB |
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| Status | E |
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| Grant date | 2015-05-11 |
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| Expiration | 2025-06-13 |
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| Cancellation | 2025-08-16 |
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| Frequency range | 809.4875 - 854.4875 MHz (2 frequencies) |
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| Locations | 4 |
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| Representative location | SAN RAMON, CONTRA COSTA, CA |
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| Coordinates | 37.7382500, -121.9949722 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:20:26 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FX1 | 809.48750000 | | | 10.000000 | 30.000000 | |
| 4 | 1 | MO | 809.48750000 | | | 35.000000 | 40.000000 | |
| 2 | 1 | FB2 | 854.48750000 | | | 125.000000 | 125.000000 | |
| 3 | 1 | FB2 | 854.48750000 | | | 80.000000 | 80.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 809.48750000 | | 20K0F3E |
| 4 | 1 | 809.48750000 | | 20K0F3E |
| 2 | 1 | 854.48750000 | | 20K0F3E |
| 3 | 1 | 854.48750000 | | 20K0F3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | CONTRA COSTA, CA | | | | | N |
| 2 | T | WIEDEMAN HILL 2.8 MI SW, SAN RAMON, CONTRA COSTA, CA | 37.73825000, -121.99497222 | 565.000 m | | 53.000 m structure | N |
| 3 | T | SKAGGS PEAK, REDWOOD CITY, SAN MATEO, CA | 37.41077778, -122.30663889 | 734.000 m | | 16.000 m structure | N |
| 4 | T | CONTRA COSTA, CA | | | | | N |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | | | | | |
| 1 | 2 | T | | 44.000 m | | | | 421.000 | |
| 1 | 3 | T | | 18.000 m | | | | 518.000 | |
| 1 | 4 | T | | | | | | | |
Control points
| Number | Address | County | Phone |
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| 1 | 27577 INDUSTRIAL BLVD, HAYWARD, CA | ALAMEDA | 4155620803 |
License history
| Date | File or call sign | Action |
|---|
| 2025-08-16 | WNNJ611 | LIEXP |
| 2025-03-17 | WNNJ611 | LETRES |
| 2015-08-17 | WNNJ611 | ESUAPR |
| 2015-05-11 | WNNJ611 | LIREN |
| 2015-03-23 | WNNJ611 | LETRES |
| 2012-08-13 | WNNJ611 | EFUAPR |
| 2012-08-13 | WNNJ611 | ESUAPR |
| 2012-08-13 | WNNJ611 | EFUFNR |
| 2012-08-13 | WNNJ611 | ESUFNR |
| 2012-06-12 | WNNJ611 | LIAUA |
| 2012-06-11 | WNNJ611 | ESUAPR |
| 2012-05-24 | WNNJ611 | ESUFNR |
| 2005-06-11 | WNNJ611 | LIREN |
| 2005-03-21 | WNNJ611 | LETRES |
| 2005-03-10 | WNNJ611 | LIAUA |
| 2005-03-10 | WNNJ611 | LTSAPR |
| 2000-11-22 | WNNJ611 | LICCNV |
| 2000-07-26 | WNNJ611 | AUTHPR |
| 2000-07-26 | WNNJ611 | LIREN |
| 2000-03-10 | WNNJ611 | LETRES |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1580774 | 2026-08-02 01:20:26 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WNNJ611 | ULS 1580774 | 2026-08-02 01:20:26 |
| Status | E | ULS 1580774 | 2026-08-02 01:20:26 |
| Service | GB | ULS 1580774 | 2026-08-02 01:20:26 |
| Grant Date | 2015-05-11 | ULS 1580774 | 2026-08-02 01:20:26 |
| Expiration Date | 2025-06-13 | ULS 1580774 | 2026-08-02 01:20:26 |
| Cancellation Date | 2025-08-16 | ULS 1580774 | 2026-08-02 01:20:26 |