Universal Licensing System
WSDM447
Lighthouse School, Inc
License details
| ULS identifier | 4972414 |
|---|
| Call sign | WSDM447 |
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| Radio service | IG |
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| Status | A |
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| Grant date | 2024-06-25 |
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| Expiration | 2034-06-25 |
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| Frequency range | 452.7125 - 457.8875 MHz (4 frequencies) |
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| Locations | 1 |
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| Representative location | North Chelmsford, MIDDLESEX, MA |
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| Coordinates | 42.6445278, -71.3860278 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:09:25 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | MO | 452.16250000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | MO | 452.71250000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | MO | 457.16250000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | MO | 457.71250000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | MO | 457.88750000 | | | 4.000000 | 4.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 452.16250000 | | 11K2F3E |
| 1 | 1 | 452.16250000 | | 4K00F1D |
| 1 | 1 | 452.16250000 | | 4K00F1E |
| 1 | 1 | 452.71250000 | | 11K2F3E |
| 1 | 1 | 452.71250000 | | 4K00F1E |
| 1 | 1 | 452.71250000 | | 4K00F1D |
| 1 | 1 | 457.16250000 | | 4K00F1E |
| 1 | 1 | 457.16250000 | | 11K2F3E |
| 1 | 1 | 457.16250000 | | 4K00F1D |
| 1 | 1 | 457.71250000 | | 4K00F1E |
| 1 | 1 | 457.71250000 | | 4K00F1D |
| 1 | 1 | 457.71250000 | | 11K2F3E |
| 1 | 1 | 457.88750000 | | 4K00F1E |
| 1 | 1 | 457.88750000 | | 4K00F1D |
| 1 | 1 | 457.88750000 | | 11K2F3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | North Chelmsford, MIDDLESEX, MA | 42.64452778, -71.38602778 | | | | |
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 |
|---|
| 1 | 25 Wellman Ave, North Chelmsford, MA | MIDDLESEX | 9782514050 |
License history
| Date | File or call sign | Action |
|---|
| 2024-06-25 | WSDM447 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 4972414 | 2026-08-02 01:09:25 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WSDM447 | ULS 4972414 | 2026-08-02 01:09:25 |
| Status | A | ULS 4972414 | 2026-08-02 01:09:25 |
| Service | IG | ULS 4972414 | 2026-08-02 01:09:25 |
| Grant Date | 2024-06-25 | ULS 4972414 | 2026-08-02 01:09:25 |
| Expiration Date | 2034-06-25 | ULS 4972414 | 2026-08-02 01:09:25 |