Universal Licensing System
WRBY900
CONCRETE TECHNOLOGY SERVICES
License details
| ULS identifier | 4069424 |
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| Call sign | WRBY900 |
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| Radio service | IG |
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| Status | A |
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| Grant date | 2018-07-27 |
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| Expiration | 2028-07-27 |
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| Frequency range | 451.3125 - 452.0375 MHz (5 frequencies) |
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| Locations | 1 |
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| Representative location | WASHINGTON, DC |
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| Coordinates | 38.8938611, -77.0457778 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:22:12 |
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Licensee
| Name | CONCRETE TECHNOLOGY SERVICES |
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| Applicant type | C |
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| FRN | 0027648765 |
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| Location | GLENN DALE, MD |
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| Address | 10005 GOOD LUCK RD, GLENN DALE, MD, 20769 |
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| Phone | 3017947500 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | MO | 451.31250000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | MO | 451.43750000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | MO | 451.48750000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | MO | 451.58750000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | MO | 452.03750000 | | | 4.000000 | 4.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 451.31250000 | | 7K60FXD |
| 1 | 1 | 451.31250000 | | 7K60FXE |
| 1 | 1 | 451.43750000 | | 7K60FXD |
| 1 | 1 | 451.43750000 | | 7K60FXE |
| 1 | 1 | 451.48750000 | | 7K60FXE |
| 1 | 1 | 451.48750000 | | 7K60FXD |
| 1 | 1 | 451.58750000 | | 7K60FXE |
| 1 | 1 | 451.58750000 | | 7K60FXD |
| 1 | 1 | 452.03750000 | | 7K60FXD |
| 1 | 1 | 452.03750000 | | 7K60FXE |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | WASHINGTON, DC | 38.89386111, -77.04577778 | | | | |
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 |
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| 1 | 10005 GOOD LUCK RD, GLENN DALE, MD | MONTGOMERY | 3017947500 |
License history
| Date | File or call sign | Action |
|---|
| 2019-04-30 | WRBY900 | LETCNS |
| 2018-07-27 | WRBY900 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 4069424 | 2026-08-02 01:22:12 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WRBY900 | ULS 4069424 | 2026-08-02 01:22:12 |
| Status | A | ULS 4069424 | 2026-08-02 01:22:12 |
| Service | IG | ULS 4069424 | 2026-08-02 01:22:12 |
| Grant Date | 2018-07-27 | ULS 4069424 | 2026-08-02 01:22:12 |
| Expiration Date | 2028-07-27 | ULS 4069424 | 2026-08-02 01:22:12 |