Universal Licensing System
KNN4
Aviation Spectrum Resources Inc
License details
| ULS identifier | 1968373 |
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| Call sign | KNN4 |
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| Radio service | AF |
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| Status | C |
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| Grant date | 2009-01-06 |
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| Expiration | 2019-01-27 |
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| Cancellation | 2018-10-10 |
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| Frequency range | 131.725 - 136.975 MHz (2 frequencies) |
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| Locations | 1 |
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| Representative location | SAN FRANCISCO, SAN MATEO, CA |
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| Coordinates | 37.6167500, -122.3831944 |
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| Source archive | l_coast.zip |
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| Dataset refreshed | 2026-08-02 02:08:26 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FA | 131.72500000 | | | 25.000000 | | HL |
| 1 | 1 | FA | 136.97500000 | | | 25.000000 | | HL |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 131.72500000 | | 13K0A2D |
| 1 | 1 | 136.97500000 | | 14K0G1D |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | SAN FRANCISCO INTL AIRPORT, SAN FRANCISCO, SAN MATEO, CA | 37.61675000, -122.38319444 | 3.000 m | BANT | 10.000 m structure / 11.000 m overall | N |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | 11.000 m | | | 360.0000 | | |
License history
| Date | File or call sign | Action |
|---|
| 2018-10-11 | KNN4 | LICAN |
| 2017-08-15 | KNN4 | LIMOD |
| 2015-02-06 | KNN4 | LIAUA |
| 2015-02-05 | KNN4 | LIAUA |
| 2015-02-05 | KNN4 | ESUAPR |
| 2015-02-04 | KNN4 | ESUAPR |
| 2010-04-13 | KNN4 | LIMOD |
| 2010-02-19 | KNN4 | ESUAPR |
| 2009-01-06 | KNN4 | LIREN |
| 2008-11-03 | KNN4 | LETRES |
| 2007-03-01 | KNN4 | AUTHPR |
| 2006-03-07 | KNN4 | AUTHPR |
| 2006-01-01 | KNN4 | LIASS |
| 2005-07-25 | KNN4 | ESCAPR |
| 2003-12-16 | KNN4 | LIREN |
| 2003-11-03 | KNN4 | LETRES |
| 2001-04-27 | KNN4 | LICCNV |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1968373 | 2026-08-02 02:08:26 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | KNN4 | ULS 1968373 | 2026-08-02 02:08:26 |
| Status | C | ULS 1968373 | 2026-08-02 02:08:26 |
| Service | AF | ULS 1968373 | 2026-08-02 02:08:26 |
| Grant Date | 2009-01-06 | ULS 1968373 | 2026-08-02 02:08:26 |
| Expiration Date | 2019-01-27 | ULS 1968373 | 2026-08-02 02:08:26 |
| Cancellation Date | 2018-10-10 | ULS 1968373 | 2026-08-02 02:08:26 |