Universal Licensing System
WPPD642
ROBERTS OXYGEN COMPANY INC
License details
| ULS identifier | 1816815 |
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| Call sign | WPPD642 |
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| Radio service | IG |
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| Status | E |
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| Grant date | 1999-11-02 |
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| Expiration | 2004-11-02 |
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| Cancellation | 2005-01-08 |
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| Frequency range | 451.675 MHz |
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| Locations | 1 |
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| Representative location | MONTGOMERY, MD |
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| Coordinates | 39.1353889, -77.1755278 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:26:59 |
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Licensee
| Name | ROBERTS OXYGEN COMPANY INC |
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| Applicant type | C |
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| Location | ROCKVILLE, MD |
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| Address | ROCKVILLE, MD, 20855 |
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| Phone | 3019488100 |
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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 | MO | 451.67500000 | | | 4.000000 | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 451.67500000 | | 20K0F3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | MONTGOMERY, MD | 39.13538889, -77.17552778 | | | | |
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 | 17011 RAILROAD ST, GAITHERSBURG, MD | | 3019488100 |
License history
| Date | File or call sign | Action |
|---|
| 2005-01-08 | WPPD642 | LIEXP |
| 2004-08-09 | WPPD642 | LETRES |
| 2001-12-03 | WPPD642 | AUDOPR |
| 2000-11-23 | WPPD642 | LICCNV |
| 1999-11-02 | WPPD642 | LIISS |
| 1999-11-02 | WPPD642 | AUTHPR |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1816815 | 2026-08-02 01:26:59 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
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| Call Sign | WPPD642 | ULS 1816815 | 2026-08-02 01:26:59 |
| Status | E | ULS 1816815 | 2026-08-02 01:26:59 |
| Service | IG | ULS 1816815 | 2026-08-02 01:26:59 |
| Grant Date | 1999-11-02 | ULS 1816815 | 2026-08-02 01:26:59 |
| Expiration Date | 2004-11-02 | ULS 1816815 | 2026-08-02 01:26:59 |
| Cancellation Date | 2005-01-08 | ULS 1816815 | 2026-08-02 01:26:59 |