Universal Licensing System
WRDU583
AT&T Mobility Spectrum, LLC
License details
| ULS identifier | 4182225 |
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| Call sign | WRDU583 |
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| Radio service | CF |
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| Status | A |
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| Grant date | 2019-07-23 |
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| Expiration | 2029-07-23 |
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| Frequency range | 5945.2 - 11175 MHz (7 frequencies) |
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| Locations | 3 |
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| Representative location | Greycliff, SWEET GRASS, MT |
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| Coordinates | 45.7929167, -109.6705833 |
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| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-08-02 02:47:18 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 3 | FXO | 5945.20000000 | | | | | |
| 1 | 3 | FXO | 6123.10000000 | | | | | |
| 1 | 4 | FXO | 6123.10000000 | | | | | |
| 1 | 2 | FXO | 10935.00000000 | | | | | |
| 1 | 1 | FXO | 10975.00000000 | | | | | |
| 1 | 2 | FXO | 11095.00000000 | | | | | |
| 1 | 1 | FXO | 11135.00000000 | | | | | |
| 1 | 2 | FXO | 11175.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 3 | 5945.20000000 | | 30M0D7W |
| 1 | 3 | 6123.10000000 | | 30M0D7W |
| 1 | 4 | 6123.10000000 | | 30M0D7W |
| 1 | 2 | 10935.00000000 | | 40M0D7W |
| 1 | 1 | 10975.00000000 | | 40M0D7W |
| 1 | 2 | 11095.00000000 | | 40M0D7W |
| 1 | 1 | 11135.00000000 | | 40M0D7W |
| 1 | 2 | 11175.00000000 | | 40M0D7W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | Deadmans Canyon Road, Greycliff, SWEET GRASS, MT | 45.79291667, -109.67058333 | 1551.700 m | MTOWER | 30.500 m structure / 32.900 m overall | |
| 2 | R | | 45.85625000, -109.96250000 | 1366.100 m | | | |
| 3 | R | | 45.64286111, -109.29988889 | 1243.600 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | ANDREW CORPORATION UHX6-107K RF | | H | 44.0000 | 287.3000 | | |
| 1 | 2 | R | ANDREW CORPORATION UHX6-107K RF | | | 44.0000 | | | |
| 2 | 1 | T | ANDREW CORPORATION UHX6-107K RF | | V | 44.0000 | 287.3000 | | |
| 2 | 2 | R | ANDREW CORPORATION UHX6-107K RF | | | 44.0000 | | | |
| 3 | 1 | T | ANDREW CORPORATION UHX6-59L LF | | H | 38.8000 | 119.9000 | | |
| 3 | 3 | R | ANDREW CORPORATION UHX6-59L LF | | | 38.8000 | | | |
| 4 | 1 | T | ANDREW CORPORATION UHX6-59L LF | | V | 38.8000 | 119.9000 | | |
| 4 | 3 | R | ANDREW CORPORATION UHX6-59L LF | | | 38.8000 | | | |
License history
| Date | File or call sign | Action |
|---|
| 2025-09-04 | WRDU583 | LIAUA |
| 2024-01-25 | WRDU583 | LIAUA |
| 2023-01-18 | WRDU583 | LIAUA |
| 2023-01-12 | WRDU583 | LIAUA |
| 2019-07-23 | WRDU583 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 4182225 | 2026-08-02 02:47:18 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WRDU583 | ULS 4182225 | 2026-08-02 02:47:18 |
| Status | A | ULS 4182225 | 2026-08-02 02:47:18 |
| Service | CF | ULS 4182225 | 2026-08-02 02:47:18 |
| Grant Date | 2019-07-23 | ULS 4182225 | 2026-08-02 02:47:18 |
| Expiration Date | 2029-07-23 | ULS 4182225 | 2026-08-02 02:47:18 |