Universal Licensing System
WAU4
Aviation Spectrum Resources Inc
License details
| ULS identifier | 1973980 |
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| Call sign | WAU4 |
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| Radio service | AF |
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| Status | A |
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| Grant date | 2018-12-26 |
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| Expiration | 2029-01-12 |
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| Frequency range | 131.925 MHz |
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| Locations | 1 |
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| Representative location | CHICAGO, COOK, IL |
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| Coordinates | 41.9623611, -87.9185278 |
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| Source archive | l_coast.zip |
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| Dataset refreshed | 2026-08-02 02:08:28 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
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| 1 | 1 | FA | 131.92500000 | | | 10.000000 | | LL |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
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| 1 | 1 | 131.92500000 | | 6K00A3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
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| 1 | T | O HARE INTERNATIONAL AIRPORT, CHICAGO, COOK, IL | 41.96236111, -87.91852778 | 204.000 m | BANT | 8.000 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 |
|---|
| 2018-12-26 | WAU4 | LIREN |
| 2018-10-22 | WAU4 | LETRES |
| 2015-02-06 | WAU4 | LIAUA |
| 2015-02-05 | WAU4 | ESUAPR |
| 2015-02-05 | WAU4 | LIAUA |
| 2015-02-04 | WAU4 | ESUAPR |
| 2009-01-06 | WAU4 | LIREN |
| 2008-10-20 | WAU4 | LETRES |
| 2007-03-01 | WAU4 | AUTHPR |
| 2006-03-07 | WAU4 | AUTHPR |
| 2006-01-01 | WAU4 | LIASS |
| 2005-07-25 | WAU4 | ESCAPR |
| 2003-12-02 | WAU4 | LIREN |
| 2003-10-20 | WAU4 | LETRES |
| 2001-04-27 | WAU4 | LICCNV |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1973980 | 2026-08-02 02:08:28 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WAU4 | ULS 1973980 | 2026-08-02 02:08:28 |
| Status | A | ULS 1973980 | 2026-08-02 02:08:28 |
| Service | AF | ULS 1973980 | 2026-08-02 02:08:28 |
| Grant Date | 2018-12-26 | ULS 1973980 | 2026-08-02 02:08:28 |
| Expiration Date | 2029-01-12 | ULS 1973980 | 2026-08-02 02:08:28 |