Universal Licensing System
WDR4
Aviation Spectrum Resources Inc
License details
| ULS identifier | 1974749 |
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| Call sign | WDR4 |
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| Radio service | AF |
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| Status | A |
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| Grant date | 2017-01-04 |
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| Expiration | 2027-01-23 |
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| Frequency range | 131.55 - 136.975 MHz (2 frequencies) |
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| Locations | 1 |
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| Representative location | MANCHESTER, HILLSBOROUGH, NH |
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| Coordinates | 42.9334167, -71.4378333 |
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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 |
|---|
| 1 | 1 | FA | 131.55000000 | | | 55.000000 | | HL |
| 1 | 1 | FA | 136.97500000 | | | 55.000000 | | HL |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 131.55000000 | | 13K0A2D |
| 1 | 1 | 136.97500000 | | 14K0G1D |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | Manchester Airport, MANCHESTER, HILLSBOROUGH, NH | 42.93341667, -71.43783333 | 71.000 m | BANT | 9.000 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 | | | | | |
Control points
| Number | Address | County | Phone |
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| 1 | 2551 RIVA RD, ANNAPOLIS, MD | ANNE ARUNDEL | 4102664034 |
License history
| Date | File or call sign | Action |
|---|
| 2021-07-28 | WDR4 | LIAUA |
| 2017-01-04 | WDR4 | LIREN |
| 2016-10-31 | WDR4 | LETRES |
| 2015-02-06 | WDR4 | LIAUA |
| 2015-02-05 | WDR4 | LIAUA |
| 2015-02-05 | WDR4 | ESUAPR |
| 2015-02-04 | WDR4 | ESUAPR |
| 2013-07-16 | WDR4 | LIMOD |
| 2013-05-02 | WDR4 | ESUAPR |
| 2007-03-01 | WDR4 | AUTHPR |
| 2007-01-09 | WDR4 | LIREN |
| 2006-10-30 | WDR4 | LETRES |
| 2006-03-07 | WDR4 | AUTHPR |
| 2006-01-01 | WDR4 | LIASS |
| 2005-07-25 | WDR4 | ESCAPR |
| 2001-12-11 | WDR4 | LIREN |
| 2001-10-29 | WDR4 | LETRES |
| 2001-04-27 | WDR4 | LICCNV |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1974749 | 2026-08-02 02:08:28 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WDR4 | ULS 1974749 | 2026-08-02 02:08:28 |
| Status | A | ULS 1974749 | 2026-08-02 02:08:28 |
| Service | AF | ULS 1974749 | 2026-08-02 02:08:28 |
| Grant Date | 2017-01-04 | ULS 1974749 | 2026-08-02 02:08:28 |
| Expiration Date | 2027-01-23 | ULS 1974749 | 2026-08-02 02:08:28 |