Universal Licensing System
WPKN421
GREENFIELD ASSOCIATES
License details
| ULS identifier | 1785357 |
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| Call sign | WPKN421 |
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| Radio service | IG |
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| Status | T |
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| Grant date | 1997-05-09 |
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| Expiration | 2002-05-09 |
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| Cancellation | 2002-03-22 |
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| Frequency range | 463.875 - 468.875 MHz (2 frequencies) |
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| Locations | 2 |
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| Representative location | NICEVILLE, OKALOOSA, FL |
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| Coordinates | 30.4813056, -86.4177222 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-09 03:07:55 |
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Licensee
| Name | GREENFIELD ASSOCIATES |
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| Applicant type | C |
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| Location | PASADENA, CA |
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| Address | 1256 CLUBHOUSE DR, PASADENA, CA, 91105 |
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| Phone | 6267990133 |
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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 | FB2 | 463.87500000 | | | 10.000000 | 15.000000 | |
| 2 | 1 | MO | 468.87500000 | | | 1.000000 | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 463.87500000 | | 16K0F2D |
| 2 | 1 | 468.87500000 | | 16K0F2D |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
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| 1 | T | 1950 BLUEWATER BLVD, NICEVILLE, OKALOOSA, FL | 30.48130556, -86.41772222 | 35.000 m | B | 7.000 m structure / 11.000 m overall | N |
| 2 | T | | | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
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| 1 | 1 | T | | 11.000 m | | | | 8.000 | |
| 1 | 2 | T | | | | | | | |
Control points
| Number | Address | County | Phone |
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| 1 | 1256 CLUBHOUSE DR, PASADENA, CA | | 6267990133 |
License history
| Date | File or call sign | Action |
|---|
| 2002-03-22 | WPKN421 | LITERM |
| 2002-02-11 | WPKN421 | LETRES |
| 2001-11-06 | WPKN421 | AUDCAN |
| 2000-11-23 | WPKN421 | LICCNV |
| 1998-04-20 | WPKN421 | AUTHPR |
| 1998-04-20 | WPKN421 | LIMOD |
Sources and provenance
| Source | Source record | Retrieved | Match |
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| ULS | 1785357 | 2026-08-09 03:07:55 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
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| Call Sign | WPKN421 | ULS 1785357 | 2026-08-09 03:07:55 |
| Status | T | ULS 1785357 | 2026-08-09 03:07:55 |
| Service | IG | ULS 1785357 | 2026-08-09 03:07:55 |
| Grant Date | 1997-05-09 | ULS 1785357 | 2026-08-09 03:07:55 |
| Expiration Date | 2002-05-09 | ULS 1785357 | 2026-08-09 03:07:55 |
| Cancellation Date | 2002-03-22 | ULS 1785357 | 2026-08-09 03:07:55 |