Universal Licensing System
WRDT907
HALLMARK AVIATION
License details
| ULS identifier | 4180978 |
|---|
| Call sign | WRDT907 |
|---|
| Radio service | IG |
|---|
| Status | A |
|---|
| Grant date | 2019-07-18 |
|---|
| Expiration | 2029-07-18 |
|---|
| Frequency range | 451.4125 - 457.8125 MHz (10 frequencies) |
|---|
| Locations | 1 |
|---|
| Representative location | MILLBRAE, SAN MATEO, CA |
|---|
| Coordinates | 37.6154167, -122.3898611 |
|---|
| Source archive | l_LMpriv.zip |
|---|
| Dataset refreshed | 2026-08-02 01:22:59 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | MO | 451.41250000 | | | 5.000000 | 5.000000 | |
| 1 | 1 | MO | 451.51250000 | | | 5.000000 | 5.000000 | |
| 2 | 1 | MO | 451.68750000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | MO | 452.18750000 | | | 5.000000 | 5.000000 | |
| 2 | 1 | MO | 452.81250000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | MO | 452.86250000 | | | 5.000000 | 5.000000 | |
| 2 | 1 | MO | 456.68750000 | | | 4.000000 | 4.000000 | |
| 2 | 1 | MO | 457.03750000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | MO | 457.18750000 | | | 5.000000 | 5.000000 | |
| 2 | 1 | MO | 457.81250000 | | | 4.000000 | 4.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 451.41250000 | | 7K60FXE |
| 1 | 1 | 451.51250000 | | 7K60FXE |
| 2 | 1 | 451.68750000 | | 7K60FXE |
| 1 | 1 | 452.18750000 | | 7K60FXE |
| 2 | 1 | 452.81250000 | | 7K60FXE |
| 1 | 1 | 452.86250000 | | 7K60FXE |
| 2 | 1 | 456.68750000 | | 7K60FXE |
| 2 | 1 | 457.03750000 | | 7K60FXE |
| 1 | 1 | 457.18750000 | | 7K60FXE |
| 2 | 1 | 457.81250000 | | 7K60FXE |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | SAN FRANCISCO, SAN MATEO, CA | 37.62130556, -122.37894444 | | | | |
| 2 | T | MILLBRAE, SAN MATEO, CA | 37.61541667, -122.38986111 | | | | N |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | | | | | |
| 1 | 2 | T | | | | | | | |
Control points
| Number | Address | County | Phone |
|---|
| 1 | SAN FRANCISCO INTERNATIONAL AIRPORT, TERMINAL 4, SAN FRANCISCO, CA | SAN MATEO | 2134475438 |
| 2 | 100 INTERNATIONAL TERMINAL SFO, MILLBRAE, CA | SAN MATEO | 6508736132 |
License history
| Date | File or call sign | Action |
|---|
| 2020-04-21 | WRDT907 | LETCNS |
| 2020-04-20 | WRDT907 | LIMOD |
| 2019-07-18 | WRDT907 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 4180978 | 2026-08-02 01:22:59 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WRDT907 | ULS 4180978 | 2026-08-02 01:22:59 |
| Status | A | ULS 4180978 | 2026-08-02 01:22:59 |
| Service | IG | ULS 4180978 | 2026-08-02 01:22:59 |
| Grant Date | 2019-07-18 | ULS 4180978 | 2026-08-02 01:22:59 |
| Expiration Date | 2029-07-18 | ULS 4180978 | 2026-08-02 01:22:59 |