Universal Licensing System
WRDB420
BOB, LLC
License details
| ULS identifier | 4135497 |
|---|
| Call sign | WRDB420 |
|---|
| Radio service | CF |
|---|
| Status | C |
|---|
| Grant date | 2019-03-19 |
|---|
| Expiration | 2029-03-19 |
|---|
| Cancellation | 2025-07-22 |
|---|
| Frequency range | 11225 MHz |
|---|
| Locations | 1 |
|---|
| Coordinates | 38.9582500, -77.4235000 |
|---|
| Source archive | l_micro.zip |
|---|
| Dataset refreshed | 2026-08-02 02:47:10 |
|---|
Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FXO | 11225.00000000 | | | | | |
| 1 | 1 | FXO | 11225.00000000 | | | | | |
| 1 | 1 | FXO | 11225.00000000 | | | | | |
| 1 | 1 | FXO | 11225.00000000 | | | | | |
| 1 | 1 | FXO | 11225.00000000 | | | | | |
| 1 | 1 | FXO | 11225.00000000 | | | | | |
| 1 | 2 | FXO | 21875.00000000 | | | | | |
| 1 | 2 | FXO | 21875.00000000 | | | | | |
| 1 | 2 | FXO | 21875.00000000 | | | | | |
| 1 | 2 | FXO | 21875.00000000 | | | | | |
| 1 | 2 | FXO | 21875.00000000 | | | | | |
| 1 | 2 | FXO | 21875.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 11225.00000000 | | 37M8D7W |
| 1 | 1 | 11225.00000000 | | 37M8D7W |
| 1 | 1 | 11225.00000000 | | 37M8D7W |
| 1 | 1 | 11225.00000000 | | 37M8D7W |
| 1 | 1 | 11225.00000000 | | 37M8D7W |
| 1 | 1 | 11225.00000000 | | 37M8D7W |
| 1 | 2 | 21875.00000000 | | 47M3D7W |
| 1 | 2 | 21875.00000000 | | 47M3D7W |
| 1 | 2 | 21875.00000000 | | 47M3D7W |
| 1 | 2 | 21875.00000000 | | 47M3D7W |
| 1 | 2 | 21875.00000000 | | 47M3D7W |
| 1 | 2 | 21875.00000000 | | 47M3D7W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 11800 Sunrise Valley Dr, Reston, FAIRFAX, VA | 38.94947222, -77.35511111 | 144.000 m | BMAST | 56.000 m structure / 58.000 m overall | N |
| 2 | R | | 39.00616667, -77.48775000 | 89.000 m | | | |
| 3 | R | | 38.95825000, -77.42350000 | 96.000 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | RF Engineering & Energy R RFMA-1135UH06S | | V | 34.5000 | 298.7000 | | |
| 1 | 2 | R | RF Engineering & Energy R RFMA-1135UH06S | | | 34.5000 | 0.0000 | | |
| 1 | 3 | R | RF Engineering & Energy R RFMA-2341UH06S | | | 40.5000 | 0.0000 | | |
| 2 | 1 | T | RF Engineering & Energy R RFMA-2341UH06S | | V | 40.5000 | 279.4000 | | |
Special conditions
| Type | Condition code |
|---|
| P | 4020 |
| P | 5106 |
License history
| Date | File or call sign | Action |
|---|
| 2025-07-23 | WRDB420 | LICAN |
| 2025-04-23 | WRDB420 | LITRAN |
| 2024-05-11 | WRDB420 | LIAUA |
| 2020-10-24 | WRDB420 | LITRAN |
| 2020-09-21 | WRDB420 | LITRAN |
| 2020-08-05 | WRDB420 | LIAUA |
| 2019-08-06 | WRDB420 | LIMOD |
| 2019-03-19 | WRDB420 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 4135497 | 2026-08-02 02:47:10 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WRDB420 | ULS 4135497 | 2026-08-02 02:47:10 |
| Status | C | ULS 4135497 | 2026-08-02 02:47:10 |
| Service | CF | ULS 4135497 | 2026-08-02 02:47:10 |
| Grant Date | 2019-03-19 | ULS 4135497 | 2026-08-02 02:47:10 |
| Expiration Date | 2029-03-19 | ULS 4135497 | 2026-08-02 02:47:10 |
| Cancellation Date | 2025-07-22 | ULS 4135497 | 2026-08-02 02:47:10 |