Universal Licensing System
WRDF881
California Internet, LLC dba GeoLinks
License details
| ULS identifier | 4151543 |
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| Call sign | WRDF881 |
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| Radio service | MG |
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| Status | A |
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| Grant date | 2019-04-19 |
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| Expiration | 2029-04-19 |
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| Frequency range | 21975 MHz |
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| Locations | 2 |
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| Representative location | Alameda, ALAMEDA, CA |
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| Coordinates | 37.7812500, -122.2674722 |
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| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-08-02 02:43:48 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FXO | 21975.00000000 | | | | | |
| 1 | 1 | FXO | 21975.00000000 | | | | | |
| 1 | 1 | FXO | 21975.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 21975.00000000 | | 50M0G7W |
| 1 | 1 | 21975.00000000 | | 50M0D7W |
| 1 | 1 | 21975.00000000 | | 50M0D7W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 1005 Atlantic Ave, Alameda, ALAMEDA, CA | 37.78125000, -122.26747222 | 5.200 m | B | 7.000 m structure / 7.000 m overall | |
| 2 | R | | 37.85080556, -122.19244444 | 531.300 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | COMMSCOPE VHLP2-23C | | V | 40.7000 | 40.5000 | | |
| 1 | 2 | R | COMMSCOPE VHLP1-23C | | | 35.6000 | | | |
Special conditions
| Type | Condition code |
|---|
| P | 4020 |
| P | 5106 |
License history
| Date | File or call sign | Action |
|---|
| 2026-01-26 | WRDF881 | LIASS |
| 2025-09-05 | WRDF881 | LIAUA |
| 2025-08-02 | WRDF881 | LIAUA |
| 2022-07-27 | WRDF881 | LIASS |
| 2021-01-01 | WRDF881 | LIASS |
| 2020-07-21 | WRDF881 | LETCNS |
| 2020-02-11 | WRDF881 | LITRAN |
| 2019-04-19 | WRDF881 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 4151543 | 2026-08-02 02:43:48 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WRDF881 | ULS 4151543 | 2026-08-02 02:43:48 |
| Status | A | ULS 4151543 | 2026-08-02 02:43:48 |
| Service | MG | ULS 4151543 | 2026-08-02 02:43:48 |
| Grant Date | 2019-04-19 | ULS 4151543 | 2026-08-02 02:43:48 |
| Expiration Date | 2029-04-19 | ULS 4151543 | 2026-08-02 02:43:48 |