| Callsign | KJ4ZYB |
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| Radio Service | HA - Amateur |
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| License Status | A - Active |
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| Grant Date | 2020-12-07 |
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| Effective Date | 2026-09-08 |
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| Expire Date | 2031-01-24 |
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| Cancel Date | |
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| Last Action Date | 2026-09-08 |
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| End Date | 2031-01-24 |
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| Available Date | 2033-01-25 |
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| Applicant Type | I - Individual |
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| Entity Name | Porterfield JR, Frederick Dale |
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| Street Address / Locality | 3585 Forester Rd SW
Roanoke, VA 24015 |
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| County | Roanoke city |
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| Zip Location | 37°15'24.3"N 79°58'52.8"W |
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| Maidenhead | FM07ag |
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| FRN | 0020544391 |
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| Licensee ID/SGIN | L01614361 / 000 |
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| Licensee Class | G - General |
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| Callsign Group | D - 2x3 |
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| ULS/Geo Region | 4 / 4 / VA |
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| Prev Callsign / Prev Class | T - Technician |
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| Next Callsign | |
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| Trustee Callsign / Trustee Name | |
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| Vanity Type | |
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| ULS File Number | 0012176902 |
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| Phonetic weight / Morse weight | 13 / 84 |
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