Universal Licensing System
WPSI494
MADDOX ENGINEERS & SURVEYORS INC
License details
| ULS identifier | 1987890 |
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| Call sign | WPSI494 |
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| Radio service | IG |
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| Status | E |
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| Grant date | 2011-02-19 |
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| Expiration | 2021-05-08 |
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| Cancellation | 2021-07-17 |
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| Frequency range | 461.025 - 464.75 MHz (14 frequencies) |
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| Locations | 2 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:14:43 |
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Licensee
| Name | MADDOX ENGINEERS & SURVEYORS INC |
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| Applicant type | C |
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| FRN | 0004673224 |
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| Location | ROCKVILLE, MD |
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| Address | 3204 TOWER OAKS BLVD SUITE 200 A, ROCKVILLE, MD, 20852 |
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| Phone | 3017629001 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FBT | 461.02500000 | | | 35.000000 | 35.000000 | |
| 1 | 1 | FBT | 461.07500000 | | | 35.000000 | 35.000000 | |
| 1 | 1 | FBT | 461.10000000 | | | 35.000000 | 35.000000 | |
| 1 | 1 | FBT | 462.12500000 | | | 35.000000 | 35.000000 | |
| 1 | 1 | FBT | 462.37500000 | | | 35.000000 | 35.000000 | |
| 1 | 1 | FBT | 462.40000000 | | | 35.000000 | 35.000000 | |
| 2 | 1 | FBI | 464.50000000 | | | 35.000000 | 35.000000 | |
| 2 | 1 | FBI | 464.55000000 | | | 35.000000 | 35.000000 | |
| 1 | 1 | FBT | 464.60000000 | | | 35.000000 | 35.000000 | |
| 1 | 1 | FBT | 464.62500000 | | | 35.000000 | 35.000000 | |
| 1 | 1 | FBT | 464.65000000 | | | 35.000000 | 35.000000 | |
| 1 | 1 | FBT | 464.70000000 | | | 35.000000 | 35.000000 | |
| 1 | 1 | FBT | 464.72500000 | | | 35.000000 | 35.000000 | |
| 1 | 1 | FBT | 464.75000000 | | | 35.000000 | 35.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 461.02500000 | | 11K2F1D |
| 1 | 1 | 461.07500000 | | 11K2F1D |
| 1 | 1 | 461.10000000 | | 11K2F1D |
| 1 | 1 | 462.12500000 | | 11K2F1D |
| 1 | 1 | 462.37500000 | | 11K2F1D |
| 1 | 1 | 462.40000000 | | 11K2F1D |
| 2 | 1 | 464.50000000 | | 11K2F1D |
| 2 | 1 | 464.55000000 | | 11K2F1D |
| 1 | 1 | 464.60000000 | | 11K2F1D |
| 1 | 1 | 464.62500000 | | 11K2F1D |
| 1 | 1 | 464.65000000 | | 11K2F1D |
| 1 | 1 | 464.70000000 | | 11K2F1D |
| 1 | 1 | 464.72500000 | | 11K2F1D |
| 1 | 1 | 464.75000000 | | 11K2F1D |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | | | | | | |
| 2 | T | | | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | | | | | | | | |
| 1 | 2 | | | | | | | | |
Control points
| Number | Address | County | Phone |
|---|
| 2 | 3204 TOWER OAKS BLVD SUITE 200 A, ROCKVILLE, MD | MONTGOMERY | 3017629001 |
License history
| Date | File or call sign | Action |
|---|
| 2021-07-17 | WPSI494 | LIEXP |
| 2021-02-15 | WPSI494 | LETRES |
| 2014-04-16 | WPSI494 | LIMOD |
| 2014-04-15 | WPSI494 | ESUAPR |
| 2012-09-17 | WPSI494 | LIMOD |
| 2012-06-30 | WPSI494 | ESUAPR |
| 2011-03-24 | WPSI494 | AUTHPR |
| 2011-02-19 | WPSI494 | LIREN |
| 2011-02-15 | WPSI494 | ESUAPR |
| 2011-02-14 | WPSI494 | LETRES |
| 2001-05-08 | WPSI494 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1987890 | 2026-08-02 01:14:43 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WPSI494 | ULS 1987890 | 2026-08-02 01:14:43 |
| Status | E | ULS 1987890 | 2026-08-02 01:14:43 |
| Service | IG | ULS 1987890 | 2026-08-02 01:14:43 |
| Grant Date | 2011-02-19 | ULS 1987890 | 2026-08-02 01:14:43 |
| Expiration Date | 2021-05-08 | ULS 1987890 | 2026-08-02 01:14:43 |
| Cancellation Date | 2021-07-17 | ULS 1987890 | 2026-08-02 01:14:43 |