Universal Licensing System
WPMM556
TWINBROOK ASSOCIATES INC
License details
| ULS identifier | 1797143 |
|---|
| Call sign | WPMM556 |
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| Radio service | IG |
|---|
| Status | C |
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| Grant date | 2003-07-09 |
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| Expiration | 2013-09-18 |
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| Cancellation | 2008-04-25 |
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| Frequency range | 451.4 - 463.95 MHz (18 frequencies) |
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| Locations | 1 |
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| Representative location | MIDDLESEX, MA |
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| Coordinates | 42.4042500, -71.2431111 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:16:20 |
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Licensee
| Name | TWINBROOK ASSOCIATES INC |
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| Applicant type | C |
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| FRN | 0009263302 |
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| Location | WALTHAM, MA |
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| Address | 42 CHERYL LAKE, WALTHAM, MA, 02154 |
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| Phone | 7818946316 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | MO | 451.35000000 | | | 5.000000 | | |
| 1 | 1 | MO | 451.37500000 | | | 5.000000 | | |
| 1 | 1 | MO | 451.40000000 | | | 5.000000 | | |
| 1 | 1 | MO | 451.50000000 | | | 5.000000 | | |
| 1 | 1 | MO | 451.55000000 | | | 5.000000 | | |
| 1 | 1 | MO | 451.62500000 | | | 5.000000 | | |
| 1 | 1 | MO | 451.65000000 | | | 5.000000 | | |
| 1 | 1 | MO | 451.70000000 | | | 5.000000 | | |
| 1 | 1 | MO | 451.82500000 | | | 5.000000 | | |
| 1 | 1 | MO | 451.95000000 | | | 5.000000 | | |
| 1 | 1 | MO | 451.97500000 | | | 5.000000 | | |
| 1 | 1 | MO | 452.05000000 | | | 5.000000 | | |
| 1 | 1 | MO | 452.12500000 | | | 5.000000 | | |
| 1 | 1 | MO | 452.57500000 | | | 5.000000 | | |
| 1 | 1 | MO | 452.60000000 | | | 5.000000 | | |
| 1 | 1 | MO | 452.62500000 | | | 5.000000 | | |
| 1 | 1 | MO | 452.67500000 | | | 5.000000 | | |
| 1 | 1 | MO | 452.97500000 | | | 5.000000 | | |
| 1 | 1 | MO | 461.82500000 | | | 5.000000 | | |
| 1 | 1 | MO | 463.95000000 | | | 5.000000 | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 451.35000000 | | 20K0F3E |
| 1 | 1 | 451.37500000 | | 20K0F3E |
| 1 | 1 | 451.40000000 | | 20K0F3E |
| 1 | 1 | 451.50000000 | | 20K0F3E |
| 1 | 1 | 451.55000000 | | 20K0F3E |
| 1 | 1 | 451.62500000 | | 20K0F3E |
| 1 | 1 | 451.65000000 | | 20K0F3E |
| 1 | 1 | 451.70000000 | | 20K0F3E |
| 1 | 1 | 451.82500000 | | 20K0F3E |
| 1 | 1 | 451.95000000 | | 20K0F3E |
| 1 | 1 | 451.97500000 | | 20K0F3E |
| 1 | 1 | 452.05000000 | | 20K0F3E |
| 1 | 1 | 452.12500000 | | 20K0F3E |
| 1 | 1 | 452.57500000 | | 20K0F3E |
| 1 | 1 | 452.60000000 | | 20K0F3E |
| 1 | 1 | 452.62500000 | | 20K0F3E |
| 1 | 1 | 452.67500000 | | 20K0F3E |
| 1 | 1 | 452.97500000 | | 20K0F3E |
| 1 | 1 | 461.82500000 | | 20K0F3E |
| 1 | 1 | 463.95000000 | | 20K0F3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | MIDDLESEX, MA | 42.40425000, -71.24311111 | | | | |
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 | 216 LAKE ST, WALTHAM, MA | | 7818946316 |
License history
| Date | File or call sign | Action |
|---|
| 2008-04-29 | WPMM556 | LICAN |
| 2008-04-29 | WPMM556 | LTSAPR |
| 2003-07-09 | WPMM556 | LIREN |
| 2003-06-23 | WPMM556 | LETRES |
| 2003-03-03 | WPMM556 | AUDOPR |
| 2000-11-23 | WPMM556 | LICCNV |
| 1998-09-18 | WPMM556 | LIISS |
| 1998-09-18 | WPMM556 | AUTHPR |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1797143 | 2026-08-02 01:16:20 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WPMM556 | ULS 1797143 | 2026-08-02 01:16:20 |
| Status | C | ULS 1797143 | 2026-08-02 01:16:20 |
| Service | IG | ULS 1797143 | 2026-08-02 01:16:20 |
| Grant Date | 2003-07-09 | ULS 1797143 | 2026-08-02 01:16:20 |
| Expiration Date | 2013-09-18 | ULS 1797143 | 2026-08-02 01:16:20 |
| Cancellation Date | 2008-04-25 | ULS 1797143 | 2026-08-02 01:16:20 |