Universal Licensing System
KRF523
SAN MATEO, COUNTY OF
License details
| ULS identifier | 1216843 |
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| Call sign | KRF523 |
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| Radio service | PW |
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| Status | A |
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| Grant date | 2023-06-09 |
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| Expiration | 2033-06-15 |
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| Frequency range | 39.98 - 45.4 MHz (2 frequencies) |
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| Locations | 1 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:09:32 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FBT | 39.98000000 | | | 35.000000 | | |
| 1 | 1 | FBT | 45.40000000 | | | 35.000000 | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 39.98000000 | | 20K0F3E |
| 1 | 1 | 45.40000000 | | 20K0F3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | | | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | | | | | |
Control points
| Number | Address | County | Phone |
|---|
| 2 | 400 COUNTY CENTER, Redwood City, CA | SAN MATEO | 6503634442 |
License history
| Date | File or call sign | Action |
|---|
| 2025-08-22 | KRF523 | LIAUA |
| 2023-06-09 | KRF523 | LIREN |
| 2013-03-27 | KRF523 | LIREN |
| 2013-03-25 | KRF523 | LETRES |
| 2011-12-15 | KRF523 | LIAUA |
| 2011-12-14 | KRF523 | ESCAPR |
| 2003-03-26 | KRF523 | LIREN |
| 2003-03-24 | KRF523 | LETRES |
| 2002-01-16 | KRF523 | AUDOPR |
| 2000-10-20 | KRF523 | LICCNV |
| 1998-05-19 | KRF523 | LIREN |
| 1998-05-19 | KRF523 | AUTHPR |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1216843 | 2026-08-02 01:09:32 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | KRF523 | ULS 1216843 | 2026-08-02 01:09:32 |
| Status | A | ULS 1216843 | 2026-08-02 01:09:32 |
| Service | PW | ULS 1216843 | 2026-08-02 01:09:32 |
| Grant Date | 2023-06-09 | ULS 1216843 | 2026-08-02 01:09:32 |
| Expiration Date | 2033-06-15 | ULS 1216843 | 2026-08-02 01:09:32 |