Universal Licensing System
WNTC434
SAN MATEO, COUNTY OF
License details
| ULS identifier | 1019890 |
|---|
| Call sign | WNTC434 |
|---|
| Radio service | MW |
|---|
| Status | A |
|---|
| Grant date | 2020-03-17 |
|---|
| Expiration | 2030-06-07 |
|---|
| Frequency range | 6585 - 23125 MHz (2 frequencies) |
|---|
| Locations | 2 |
|---|
| Representative location | PORTOLA VALLEY, SAN MATEO, CA |
|---|
| Coordinates | 37.3721389, -122.2082778 |
|---|
| Source archive | l_micro.zip |
|---|
| Dataset refreshed | 2026-08-02 02:47:56 |
|---|
Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FXO | 6585.00000000 | | | | | |
| 1 | 2 | FXO | 23125.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 6585.00000000 | | 10M0F9W |
| 1 | 2 | 23125.00000000 | | 20M0F9W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 135 PORTOLA RD, PORTOLA VALLEY, SAN MATEO, CA | 37.37213889, -122.20827778 | 175.300 m | | 4.900 m structure / 5.500 m overall | |
| 2 | R | | 37.32880556, -122.21272222 | 719.300 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | H | 42.3000 | 184.7000 | | |
| 1 | 2 | R | | | | 36.2000 | | | |
| 2 | 1 | T | | | H | 46.3000 | 184.7000 | | |
| 2 | 2 | R | | | | 46.3000 | | | |
License history
| Date | File or call sign | Action |
|---|
| 2025-08-29 | WNTC434 | LIAUA |
| 2020-03-17 | WNTC434 | LIREN |
| 2020-03-16 | WNTC434 | LETRES |
| 2010-03-23 | WNTC434 | LIREN |
| 2010-03-15 | WNTC434 | LETRES |
| 2000-03-10 | WNTC434 | LIREN |
| 1999-08-14 | WNTC434 | LICCNV |
| 1995-04-03 | WNTC434 | LIREN |
| 1990-06-04 | WNTC434 | LIMOD |
| 1990-05-24 | WNTC434 | LIMOD |
| 1990-03-05 | WNTC434 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1019890 | 2026-08-02 02:47:56 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WNTC434 | ULS 1019890 | 2026-08-02 02:47:56 |
| Status | A | ULS 1019890 | 2026-08-02 02:47:56 |
| Service | MW | ULS 1019890 | 2026-08-02 02:47:56 |
| Grant Date | 2020-03-17 | ULS 1019890 | 2026-08-02 02:47:56 |
| Expiration Date | 2030-06-07 | ULS 1019890 | 2026-08-02 02:47:56 |